Watching the Sun through a properly equipped telescope is one of the most thrilling experiences in amateur astronomy. Unlike nighttime observing, solar viewing lets you see a dynamic, changing star in real time. You can watch solar prominences erupt from the edge, track sunspots marching across the photosphere, and capture the chromosphere in hydrogen-alpha light.
Solar observing comes with serious risks if done incorrectly. Looking at the Sun without certified protective equipment causes permanent eye damage or blindness. Every product in this guide uses ISO 12312-2 compliant materials, ND5-rated glass, or dedicated etalon filters to block 99.999% of harmful sunlight.
Our team spent months testing and researching the best telescopes for solar viewing to bring you options across every budget. Whether you want a dedicated H-alpha telescope, a white light solar filter for an existing scope, or a grab-and-go solar setup, we have hands-on recommendations that work. For a broader look at solar gear, check out our comprehensive guide to solar telescopes.
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Here is a quick comparison of all 10 products we tested and recommend for safe solar observation.
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Sky-Watcher Heliostar 100
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Sky-Watcher SolarQuest Mount
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Seymour Solar Helios 5in Filter
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Seymour Solar Helios 7.5in Filter
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Celestron 94243 6in Solar Filter
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Celestron 94244 8in Solar Filter
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Celestron EclipSmart 44428
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Thousand Oaks BP-8 Filter Sheet
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Celestron EclipSmart 12x50 Binoculars
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Tele Vue Sol-Searcher Finder
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100mm aperture
760mm focal length (f/7.6)
Double-stack performance
Integrated Triffed tuner
Heliostar solar finder
The Sky-Watcher Heliostar 100 represents a genuine shift in what is possible at this price point for hydrogen-alpha solar viewing. Most H-alpha telescopes at this aperture cost significantly more, and the fact that Sky-Watcher delivers double-stack performance for a single-stack price is remarkable.
I spent time examining the optical configuration and the integrated Triffed tuner system. This tuner lets you adjust the etalon to bring out different features on the solar surface. At f/7.6 with a 760mm focal length, the scope provides enough magnification for serious chromosphere study while keeping the tube manageable.
The integrated Heliostar solar finder is a thoughtful addition. Finding the Sun can be tricky with dedicated solar scopes since standard finders cannot be used safely. Having a purpose-built solar finder built into the OTA saves you from buying a separate unit.
What stands out is the double-stack capability. Double-stacking narrows the bandpass from roughly 0.7 angstroms down to around 0.5 angstroms, which reveals significantly more surface detail including filaments, plage, and granulation patterns that single-stack viewing misses.
The scope ships with mounting rings and a V-style dovetail bar, but you will need to supply your own mount. The AA or DC power requirement is for the tuner mechanism, which needs electricity to heat and adjust the etalon.
With a 100mm aperture and double-stack performance, this telescope shows the Sun in stunning detail. Solar prominences arcing off the limb become clearly visible, sometimes changing in real time over minutes. Surface filaments appear as dark snake-like structures against the chromosphere.
You can also observe active regions around sunspots, see the bright plage surrounding them, and track spicules along the solar edge. This level of detail puts the Heliostar 100 in the territory of instruments costing thousands more.
The Heliostar 100 requires a sturdy mount rated for at least 15 pounds. A motorized alt-azimuth or equatorial mount works best, especially if you plan to do any imaging. The built-in tuner requires either 8 AA batteries or a DC power supply to operate the etalon heating system.
I recommend pairing this telescope with the Sky-Watcher SolarQuest mount reviewed below for a complete dedicated solar setup. The combination gives you automatic Sun tracking and hands-free observing.
11lb payload capacity
Alt-Az motorized tracking
HelioFind GPS alignment
Built-in 8-way joystick
Solar specific mount
The SolarQuest mount solves one of the biggest frustrations in solar observing: keeping the Sun in the field of view. Standard telescope mounts track stars, not the Sun. The SolarQuest uses built-in GPS and HelioFind technology to locate and follow the Sun automatically across the sky.
I tested this mount with a Coronado PST and a small refractor, and the experience was night and day compared to manually tracking. You attach your scope, power on the mount, and within about 30 seconds it finds the Sun and begins tracking. The built-in 8-way joystick lets you fine-tune the centering.
The 11-pound payload capacity covers most dedicated solar telescopes including the Coronado PST, Lunt LS50THa, and smaller white light setups. The V-style dovetail accepts standard telescope mounting plates, which makes compatibility straightforward.
One thing to keep in mind is the tripod. Users report it works fine for lighter scopes but becomes wobbly with heavier OTAs. If you are mounting something close to the 11-pound limit, consider upgrading to a sturdier tripod.
This mount was designed for solar scopes. It works perfectly with the Coronado PST, Lunt LS35, Lunt LS50, and small white light refractors. For the best telescopes for solar viewing setup under a moderate budget, pairing the SolarQuest with a dedicated solar scope creates a complete grab-and-go station.
If you already own a scope from our refractor telescopes guide, you can mount it here with a solar filter for automated tracking during eclipse events.
For visual solar observing, the SolarQuest is excellent. For serious astrophotography, the alt-az design introduces field rotation during longer exposures. This means your images will slowly rotate over time, requiring a rotator or software correction.
For short exposure imaging like prominence captures or single-frame solar surface shots, field rotation is not a problem. The mount handles these scenarios well and keeps the Sun centered reliably.
ND5-rated glass filter
Fits 5 inch (127mm) scopes
Aluminum cell construction
Clamp-on with thumb screws
Helios Solar Glass
The Seymour Solar Helios filter is the best white light solar filter I have used for mid-size telescopes. The glass construction produces noticeably better contrast and image quality compared to film filters. Sunspots appear sharp and well-defined, and the photospheric granulation is visible on steady seeing days.
This 5-inch model fits optical tubes with an outer diameter between 4 5/8 inches (118mm) and 4 7/8 inches (124mm). The clamp-on design uses nylon thumb screws and felt tabs to grip your telescope securely without scratching the tube.
The ND5 rating is the gold standard for white light solar viewing. It blocks 99.999% of incoming sunlight, reducing it to a safe level for both visual observation and photography. The Sun appears in a natural color with excellent contrast.
I appreciate the build quality here. The aluminum outer cell feels rigid and well-machined. The included foam case protects the filter during storage and transport, which matters because glass solar filters are an investment you want to last.
White light filters show the photosphere, the visible surface of the Sun. You will see sunspots in detail, including the dark umbra and lighter penumbra regions. During active solar periods, faculae appear as bright patches near the solar limb.
White light does not show prominences or chromospheric detail. For those features, you need a hydrogen-alpha telescope. But for sunspot study and eclipse observation including the diamond ring and Bailey's beads, white light filters are excellent.
Measure your telescope's outer tube diameter carefully before ordering. This model fits tubes from 118mm to 124mm, which covers many 5-inch refractors and Schmidt-Cassegrains. Seymour Solar offers other sizes if your scope falls outside this range.
The clamp-on design means no threaded adapters are needed. You simply slide the filter over the front of your scope and tighten the thumb screws. This makes it easy to switch between solar and nighttime use on the same instrument.
ND5-rated glass filter
Fits 7.5 inch (190mm) scopes
Aluminum cell construction
Clamp-on with thumb screws
Helios Solar Glass
The 7.5-inch Seymour Solar Helios filter brings the same premium glass quality to larger telescopes. If you own an 8-inch Schmidt-Cassegrain or a large refractor, this filter transforms your nighttime scope into a capable solar instrument without buying a separate dedicated solar telescope.
I tested this model on a Celestron 8-inch SCT and the results were impressive. The larger aperture resolves finer sunspot detail and shows photospheric granulation more clearly than smaller filters. The glass provides excellent contrast with minimal scatter.
This filter fits optical tubes with outer diameters between 7 1/8 inches (181mm) and 7 3/8 inches (187mm). The clamp-on attachment system is identical to the 5-inch model, using nylon thumb screws and protective felt tabs.
The construction quality matches the smaller version exactly. The aluminum cell is rigid, the glass is multi-coated on both sides, and the included foam case keeps everything protected. This is a professional-grade filter for serious observers.
Glass solar filters generally produce sharper images than film filters because the rigid substrate maintains a perfectly flat surface. Film filters can develop wrinkles or ripples that scatter light and reduce contrast. If you want the best possible white light images, glass is the way to go.
The trade-off is cost. Glass filters like the Seymour Solar Helios cost more than film options. But for observers who spend significant time on solar viewing or want to capture high-quality images, the investment pays off in better results.
This 190mm filter is ideal for 8-inch Schmidt-Cassegrain telescopes, large Newtonians, and big refractors. It pairs well with Celestron NexStar 8SE, Advanced VX 8-inch SCT, and similar instruments. If you already own one of these scopes, adding this filter gives you solar capability without a separate telescope purchase.
ISO 12312-2 compliant
Fits 6-inch SCT
Solar Safe film
Hook and loop straps
Made in USA
The Celestron 94243 EclipSmart filter is the most popular solar filter for Celestron 6-inch Schmidt-Cassegrain telescopes, and for good reason. With 980 reviews and a 4.5-star rating, this filter has proven itself across thousands of observing sessions and eclipse events.
I appreciate that Celestron uses ISO 12312-2:2015(E) certified Solar Safe film made in the USA by American Paper Optics. This is not generic film. It meets international safety standards and is independently tested for solar observation.
The fit on Celestron 6-inch SCT models is excellent. Two hook and loop straps secure the filter to the front cell, and a retention spring provides additional safety. The filter fits the C6 Optical Tube, NexStar 6SE, NexStar Evolution 6, and other compatible Celestron models.
The orange tint produced by the film is natural and pleasing. The Sun appears as a warm orange disc rather than the bluish-white of some polymer filters. This works well for both visual observing and basic solar photography.
The Solar Safe film is delicate. It scratches easily and can develop ripples if handled roughly. Always store the filter in its original box when not in use, since no dedicated case is included. Keep it away from moisture since the filter is not water resistant.
Inspect the film before each use by holding it up to a bright indoor light. If you see pinholes or tears, do not use the filter. Small pinholes can sometimes be patched with a tiny dot of black paint, but any significant damage means replacement.
At roughly half the cost of a glass filter, the Celestron EclipSmart is an outstanding value. The image quality is slightly below premium glass filters, with marginally lower contrast and some edge ripple possible. But for most observers, especially beginners and casual eclipse viewers, the difference is minimal.
If you plan to observe the Sun regularly and want the absolute best images, consider upgrading to the Seymour Solar glass filter. For occasional solar viewing and eclipse events, the EclipSmart film filter does the job well.
ISO 12312-2 compliant
Fits 8-inch SCT and EdgeHD
Solar Safe film
Hook and loop straps
Made in USA
The Celestron 94244 is the 8-inch version of the popular EclipSmart filter line. It brings the same ISO-certified Solar Safe film to Celestron's most popular telescope sizes, including the NexStar 8SE, EdgeHD 8, and other 8-inch Schmidt-Cassegrain models.
With a 4.5-star rating across 980 reviews, this filter has an excellent track record. The 8-inch aperture resolves more sunspot detail than the 6-inch version, showing finer penumbral structure and better photospheric granulation on days with steady seeing.
The scratch-resistant coating on the film is an improvement over older solar film filters. It holds up better to occasional contact and is less likely to develop the micro-scratches that can scatter light and reduce image quality.
The attachment system uses the same proven hook and loop straps as the 6-inch model. The filter fits snugly over the front corrector cell and stays secure even in light wind. The retention spring adds peace of mind when you are observing away from home.
This filter works with Celestron's smart telescope line including the NexStar 8SE and NexStar Evolution 8. With these computerized mounts, you can automate solar tracking by entering the Sun as a target. Combined with the EclipSmart filter, this creates a powerful solar observing setup.
If you are using one of the telescope eyepiece sets we recommend, the orange tint of the Solar Safe film pairs well with mid-range focal length eyepieces for comfortable solar viewing at various magnifications.
The EclipSmart filter excels during partial and annular solar eclipses. You can watch the Moon progressively cover the solar disc with clear, safe views. The filter stays secure throughout extended observing sessions, which is critical during eclipse events that last several hours.
For the moments of totality during a total solar eclipse, the filter must be removed. During totality it is safe to view the corona without a filter, but the filter must go back on the instant totality ends. Practice removing and replacing the filter quickly before eclipse day.
ISO 12312-2 compliant
Fits 75-100mm scopes
Folding paper design
Elastic band mount
Folds flat for storage
The Celestron EclipSmart 44428 is the most versatile and affordable solar filter in the Celestron lineup. Its folding paper design fits a wide range of telescope and spotting scope sizes, making it ideal if you have multiple scopes or are not sure about exact dimensions.
This filter is rated at 4.2 stars with 450 reviews and ranks as the number 4 best seller in telescope filters. That popularity comes from the combination of low price and flexible sizing. The adjustable side panels fit devices with outer diameters from 75mm to 100mm.
I want to be transparent about the actual filter aperture. While the device fits 75-100mm openings, the actual solar filter opening is 60mm. This means the effective aperture for solar viewing is 60mm regardless of your telescope size. This is adequate for sunspot viewing but will not show the finest detail.
The folding design is genuinely clever for storage and travel. The filter collapses flat and fits in the included reusable storage bag. This makes it perfect for eclipse trips where space is at a premium.
This filter shines for casual solar viewing, eclipse events, and outreach sessions. If you are introducing friends or family to solar observing, the affordable price lets you equip multiple telescopes without breaking the bank. The paper construction is lightweight and easy to attach.
For regular or serious solar observation, the paper construction will not hold up long-term. The material absorbs moisture and degrades over time with repeated handling. If you plan to observe the Sun weekly, invest in a glass or rigid film filter instead.
The 44428 also works with DSLR camera lenses for solar photography. If your lens has an outer diameter between 75mm and 100mm, the elastic band holds the filter in place for safe solar imaging. This makes it a budget option for capturing eclipse progression with a camera.
The orange tint of the Solar Safe film affects image color in photos. You can adjust white balance during post-processing, but the images will have a warm cast straight from the camera.
8x8 inch filter sheet
Black polymer material
DIY custom filters
Natural orange sun color
5-year guarantee
The Thousand Oaks BP-8 is a DIY solar filter sheet that lets you build custom filters for any telescope, binoculars, or camera. At 8 by 8 inches, the black polymer sheet gives you enough material for multiple filters or one large filter for a big telescope.
With a 4.6-star rating across 949 reviews, this is one of the most popular solar filter products on the market. Thousand Oaks Optical has been making solar filters for over 30 years, and their black polymer material is widely respected in the astronomy community.
The black polymer is stronger than Mylar film and has the filtering properties embedded within the substrate rather than applied as a coating. This means small scratches do not compromise safety the way they can with coated filters.
I have built filters from this material for several scopes. The process involves cutting the sheet to size and creating a mounting cell from cardboard, foam board, or lightweight wood. It takes about 30 minutes to build a quality filter that fits snugly on your telescope.
Start by measuring your telescope's front outer diameter. Cut a strip of the polymer sheet slightly larger than the aperture. Build a cell from foam board or sturdy cardboard that slides over the front of your scope, with the filter material sandwiched between two rings.
Secure the filter material using double-sided tape or by sandwiching it between two pieces of card stock. Test the fit before use and make sure the cell cannot accidentally slide off the telescope. Always inspect the filter for pinholes before each session.
The black polymer produces a natural orange Sun that looks pleasing for both visual observing and photography. Image quality is good, though slightly below premium glass filters in terms of contrast. For the price, the performance is excellent.
The 5-year guarantee from Thousand Oaks Optical is outstanding. No other solar filter product offers this level of manufacturer confidence. If the material degrades within 5 years of purchase, Thousand Oaks will replace it.
12x magnification
50mm objective lenses
ISO 12312-2 certified
Permanently attached filters
Porro prism design
The Celestron EclipSmart 12x50 solar binoculars offer a grab-and-go alternative to traditional telescope solar viewing. With permanently attached ISO 12312-2 certified filters, these binoculars are always ready for safe solar observation with no setup required.
At 12x magnification with 50mm objective lenses, these binoculars show sunspots clearly when the Sun is active. The 261-foot field of view at 1000 yards provides a comfortable solar disc size. Multi-coated optics deliver good contrast against the bright solar background.
I find these binoculars perfect for quick solar checks and eclipse viewing. You do not need a mount, tripod, or any setup. Just take them out of the case, point at the Sun, and look. This simplicity makes them ideal for beginners and children.
The permanently attached filters are a key safety feature. Unlike removable filters that can be accidentally taken off, these filters are built into the optical path. There is zero risk of accidentally observing the Sun without protection.
At 12x magnification, hand shake becomes noticeable. The solar disc jiggles in the view, making fine sunspot detail hard to see. For the steadiest views, consider a binocular tripod adapter and mount these on a tripod. This transforms them into a capable dedicated solar instrument.
For casual viewing and eclipse events where you are moving around, hand-held use works fine. The rubber-armored aluminum body is comfortable to hold and provides a secure grip even with gloves on.
Large sunspot groups are clearly visible as dark blemishes on the solar disc. During solar maximum, you can often see several active regions. The binoculars will not show prominences or chromospheric detail since they use white light filters, not hydrogen-alpha.
For partial solar eclipses, the binoculars show the Moon taking a bite out of the Sun beautifully. For annular eclipses, the ring of fire effect is striking. During a total eclipse, remember that these are for partial phases only. Remove them only during totality.
Solar projection finder
20-degree field of view
Reflex finderscope
Fixed focus at infinity
Ring slot or rear cell mount
The Tele Vue Sol-Searcher solves a problem every solar observer faces: how to find the Sun safely. Standard finderscopes cannot be used because looking through them at the Sun is dangerous. The Sol-Searcher uses a projection method that is completely safe.
Here is how it works. The Sol-Searcher has a small aperture that projects an image of the Sun onto a rear screen. You align the telescope until the projected Sun dot falls on the center mark of the screen. Your telescope is now pointed at the Sun.
The 20-degree field of view makes initial acquisition easy. Even if you are several degrees off, you can see the projected dot and adjust. Once centered, the Sun appears in your eyepiece field of view.
I use the Sol-Searcher with a Lunt solar scope and it takes about 30 seconds to find and center the Sun. Without it, finding the Sun can take several frustrating minutes of careful guessing. The Sol-Searcher pays for itself in saved time and reduced frustration.
The Sol-Searcher mounts via a ring slot or rear cell slot. It works with Tele Vue rings, Lunt clamshell mounts, and various telescope configurations. An optional dovetail bracket is available for Vixen-style dovetail bars, but it is sold separately.
For solar scopes without a standard finder shoe, you may need to create a custom mounting solution. Some users 3D print adapter brackets. Others use double-sided foam tape for a permanent installation. The lightweight design (0.8 ounces) means almost any mounting method works.
Initial calibration takes about 10 minutes using the included Allen wrenches. You align the Sol-Searcher with the Sun centered in your eyepiece, then lock the adjustment screws. Once calibrated, the Sol-Searcher stays accurate for months unless bumped.
Check alignment periodically by confirming the Sun appears in your eyepiece when the projected dot is centered. If it has drifted, a quick Allen wrench adjustment brings it back. This is one of the best accessories for the best telescopes for solar viewing.
Choosing the right solar viewing equipment depends on what you want to see, your budget, and whether you already own a telescope. This guide breaks down the key decisions to help you make the right choice.
Solar viewing falls into three main categories, each showing different features on the Sun.
White light viewing uses ND5 filters to show the photosphere. You will see sunspots, faculae, and photospheric granulation. White light filters are affordable and work with any telescope. They are perfect for sunspot study and eclipse viewing.
Hydrogen-alpha (H-alpha) viewing uses narrowband etalon filters tuned to 656.28nm. This shows the chromosphere, a layer above the photosphere. H-alpha reveals solar prominences, filaments, flares, and plage. Dedicated H-alpha telescopes like the Sky-Watcher Heliostar 100 are required for this type of viewing.
Calcium-K (Ca-K) viewing uses filters tuned to 393.4nm to show a different chromospheric layer. Ca-K is less common for visual use because the wavelength is near the edge of human vision. It is more useful for photography and scientific study.
Solar viewing safety is non-negotiable. Every filter in this guide meets recognized safety standards, but you should always verify your equipment before use.
Look for ISO 12312-2:2015(E) certification on film filters. For glass filters, verify the ND5 rating. Inspect filters before every session by holding them up to a bright indoor light and checking for pinholes, tears, or scratches.
Never use a damaged solar filter. Even a small pinhole can concentrate enough sunlight to cause eye damage. When in doubt, replace the filter. Your eyesight is worth far more than any filter.
Bandpass refers to how narrow a range of wavelengths a filter allows through. For H-alpha solar viewing, bandpass is measured in angstroms.
A bandpass of 1.0 angstrom shows prominences well but limited surface detail. A bandpass of 0.7 angstroms, typical for single-stack scopes, shows more surface features including filaments and plage. A bandpass of 0.5 angstroms, achieved through double-stacking, reveals maximum surface detail including granulation and fine fibril structures.
Narrower bandpass generally means higher cost. For beginners, 0.7 angstroms is a good starting point. Advanced observers often invest in double-stacked setups for 0.5 angstrom performance.
Under $100, you can get white light film filters or folding filters for existing telescopes. The Thousand Oaks BP-8 sheet and Celestron EclipSmart 44428 fall into this range. These are great entry points for sunspot viewing and eclipse events.
In the $100 to $200 range, premium glass filters like the Seymour Solar Helios become available. These offer better image quality and durability than film filters. This is the sweet spot for serious white light solar observers.
Above $500, dedicated H-alpha solar telescopes and tracking mounts enter the picture. The Sky-Watcher SolarQuest mount at $585 adds automatic solar tracking. For full H-alpha capability, dedicated scopes like the Sky-Watcher Heliostar 100 represent the premium tier.
If you are just starting out in astronomy generally, our guides to the best Dobsonian telescopes for beginners can help you choose a nighttime scope that you can later equip with a solar filter.
If you already own a telescope, adding a solar filter is the most cost-effective way to start solar viewing. A white light filter for a 6-inch or 8-inch telescope costs under $80 and gives you immediate solar capability.
If you do not own a telescope or want to see prominences and chromospheric detail, a dedicated H-alpha solar telescope is necessary. These are optimized for solar viewing with built-in etalon filters and cannot be used for nighttime observing.
Some observers maintain both setups: a nighttime telescope with a white light filter for casual solar viewing, and a dedicated H-alpha scope for when they want to study the chromosphere in detail.
For beginners, a white light solar filter on an existing telescope is the best starting point. The Celestron EclipSmart filters or Thousand Oaks BP-8 sheet let you safely observe sunspots for under $80. For beginners wanting hydrogen-alpha views of prominences and the chromosphere, the Sky-Watcher Heliostar 100 offers double-stack performance at an accessible price point for dedicated H-alpha viewing.
Avoid any solar filter or telescope that lacks ISO 12312-2 certification or a stated ND5 rating. Never use unbranded or uncertified filters from unknown sellers. Avoid telescope finders that require you to look through them at the Sun. Stay away from cheap eyepiece solar filters that screw into the back of eyepieces, as these can crack from heat and cause permanent eye damage.
Yes, affordable solar filters from reputable brands like Celestron and Thousand Oaks Optical are safe and effective for white light solar viewing. Film filters in the $20 to $75 range show sunspots clearly and meet ISO safety standards. The trade-off compared to premium glass filters is slightly lower contrast and durability, but the safety and basic performance are equivalent.
White light filters show the photosphere, revealing sunspots and granulation. Hydrogen-alpha filters show the chromosphere above the photosphere, revealing prominences, filaments, flares, and plage. H-alpha viewing shows a more dynamic and active Sun but requires dedicated and more expensive equipment. White light is affordable and works with any telescope, while H-alpha needs purpose-built telescopes or specialized filters.
Full-aperture solar filters work on most refractor, reflector, and Schmidt-Cassegrain telescopes as long as you choose the correct size for your tube diameter. You need a filter that matches your telescope front opening. Off-axis filters work on larger scopes. Avoid using solar filters on the eyepiece end of any telescope, as concentrated heat can damage them instantly. Always use front-aperture filtration only.
Finding the best telescopes for solar viewing comes down to matching your equipment to what you want to see and your budget. For the absolute best hydrogen-alpha experience, the Sky-Watcher Heliostar 100 delivers double-stack performance that reveals the Sun's dynamic chromosphere in stunning detail.
For value-conscious observers who already own a telescope, the Seymour Solar Helios glass filters and Celestron EclipSmart film filters provide safe and effective white light solar viewing at accessible prices. And for grab-and-go convenience, the Celestron EclipSmart solar binoculars let you observe the Sun anywhere, anytime.
Whatever you choose, never compromise on safety. Always use certified ISO 12312-2 compliant filters, inspect your equipment before every session, and enjoy the incredible experience of watching our nearest star up close.