Unlike many white-light solar filters that produce views of the sun with a red-orange, bluish, or yellow tint, the Baader AstroSolar 80mm White-Light Solar Filter for Binocularsreveals the sun in its natural white color to show more surface details with greater clarity. The filter is mounted onto a clear-white IR-rejecting plastic ring, which acts as a stabilizing element for the filter cell, and the ring is in turn mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar to minimize thermal stress on the film for increased resistance to developing pinholes or tears.

With the ability to be installed on the outside or inside of a binocular optical tube or camera lens, this filter provides a safe way to view the sun or to capture images with a camera. To fit most binocular configurations, one side of the filter housing is cut off and should be installed on the inside of the optical tube to prevent the housings from interfering with each other when the bridge is nearly closed. Recommended for objectives from 70-90mm, the filter is engineered with three centering bolts that can fit housings and lenses with an outside diameter of 111-126mm or an inside diameter of 85-100mm (if inside mounting is possible). Installation and removal are quick and easy with no tools or permanent modification to the optic or lens required. This is a single solar filter; for proper use on binoculars, two filters must be ordered.

For Safe Solar Viewing with Binoculars    Broadband Neutral-White Color    70-90mm Recommended Aperture    Front Clear White IR-Rejecting Ring    Three Centering Bolts and Safety Straps    No Tools or Modifications Required    One Solar Filter

• For the correct fit, measure the outside or inside diameter of the binocular optical tube or lens housing—including hardware like retaining rings and screw heads—and choose the size that matches the measurement with some extra room
• Recommended for 70-90mm objective lens diameters
• 85-100mm inside diameters
• 111-126mm outside diameter

Related Questions and Answers

Q: 1. What would be the best size for a Nikon 18-200 lens? The current screw-on filter is 72mm.

A: Measure diameter at end of lens with out a lenscap. See specs for this filter and see if it slides over your lens.

Q: 2. Can I use this to take photos of the sun for practice of the upcoming solar eclipse?

A: Yes. The DayStar Filters 70mm White-Light Universal Lens Solar Filter can be used for solar photography with or without an eclipse.

Q: 3. how can I adapt the Baader U-Filter 2" to a Nikkor AF-S 50mm 1:1.8G Lens?

A: 2" is the outside diameter of the filter, not the thread. It's an M48 thread as stated on the manufacturer website, baader-planetarium. Use a normal step-up ring.

Q: 4. It looks like the ASFT 100 and the ASSF 80 will both fit my telescope. The Baader film is the same in both filters. What am I getting in the ASFT 100 that warrants spending the extra $10?

A: A larger metal ring. A larger film area.

Q: 5. What storage container would you recommend for a pair of these filters? Thanks

A: It would be best to use the box the filter comes in or use this Print File box: https://bhpho.to/3uHvHCQ

Q: 6. Will this fit the ASTROMASTER 70EQ Telescope?

A: Any chance to fit Sky-Watcher 70mmDo u know ?

Q: 7. would this filter fit on a Sony SEL1670Z 16-70mm f/4?

A: I agree with Nathan, the 65-89mm filter would be too big unless you wrapped something around the lens first. The Day Star 50mm sounds perfect for your lens. The B&H site is now showing the larger filter as discontinued at this time anyway.

Q: 8. My Nikon Action EX 16x50 binos have an outside diameter of exactly 60mm. Should I order the 60mm filters or the 70mm?

A: The Alpine Astronomical 60mm Baader AstroSolar White-Light Solar Filter for Binoculars (Single) would be too large to fit 16x50 binoculars. This Daystar kit would fit instead: https://bhpho.to/3qFnkJe

Q: 9. What size would you recommend for a Zeiss 20x60 IS binoculars? Are these the safest filters to use? Thanks.

A: The Alpine Astronomical 60mm Baader AstroSolar White-Light Solar Filter for Binoculars (Single) BH #ALASBF60 • MFR #ASBF-60 would be the appropriate sixe for the Zeiss 20x60 IS binoculars.

Q: 10. Any chance to fit Sky-Watcher 70mm ?

A: We created the Eclipsmart Solar Filters to be perfectly fit on Celestron telescopes. I can not say with any certainty that they will fit another telescope outside Celestron's