More Views
GSO 1.25" Color / Planetary Filter - #38A Dark Blue
| Brand | GSO |
| Part Number | AD052 |
| Availability | available |
| Share |
Product Info
Manufacturer Description
Color filters can be very useful for enhancing your views of the Moon and the planets. Depending on the atmospheric conditions, the telescope being used, the observer's experience, and the planet being observed or photographed, the advantages of color filters can be anywhere from subtle to dramatic. The right filter can make all the difference between seeing several small craters in the floor of Clavius on the Moon or not; seeing five or six swirls in Jupiter's belts or not; or seeing the inner Crepe Ring of Saturn or not.
GSO's 1.25" color/planetary filters are manufactured from the purest optical glass and are dyed-in-the-mass (not simply "color coated") for premium performance. They thread into the barrels of virtually any 1.25" telescope eyepiece. Each filter cell has a male and female 1.25" filter thread (M28.5x0.6) on opposite sides, so multiple filters can be stacked to achieve selective filtration of the visual color spectrum. The clear aperture is 25.6mm and each filter comes in a protective plastic storage case. Made in Taiwan.
The #38A Dark Blue Filter is a popular choice for the study of Jupiter's disc because it strongly rejects red and orange wavelengths in the belts, thus enhancing the boundaries between the reddish belts and the adjacent bright zones. It is useful for viewing the Great Red Spot. The filter works well on Martian surface phenomena like dust storms, and is very useful during the violet clearing and for polar caps.
The dark Blue filter also increases the contrast in the rings of Saturn and in low-contrast features between the zones. This is a good one to use on Venus, the low transmission increasing the contrast of dark shadings in the upper clouds. The #38A should only be used on telescopes of 8" of aperture or more, because of the reduced light transmission.
This filter is the best one to bring out the gas tails in comets.
Reviews
-
Dave In Vermont Well-Known Member
- Skill Level
- Unknown
- Time with Product
- Unknown
- User Notes:
- Review by David F.
Feb 20, 2018Does All I Wanted & Expected.
Pros: Cons: Comments:Arrived fast. Quality of build as I've come to expect from GSO - Top Quality, that means. Price, including shipping, is excellent.
Bottom Line: Would you recommend this item? Yes
Go ahead!This review was provided courtesy of AgenaAstro.com
Aug 2, 2015Too Dark For An 8" Reflector
Pros: Cons:Difficult to Use,Poor Lens Quality
Comments:This filter was so dark when using it on Saturn that the planet was almost unseeable. And that was at 60x.
Bottom Line: Would you recommend this item? NoThis review was provided courtesy of AgenaAstro.com
Feb 10, 2013Good Quality, Reasonable Price
Pros:Easy to Use
Cons: Comments:Great filter for extra deep contrast on black and white video cameras when shooting Calcium K line video. Comprable to the Baader Blue. GSO provides quality filters at a fraction of the price.
Bottom Line: Would you recommend this item? YesThis review was provided courtesy of AgenaAstro.com
rmscott59 New Member
- Skill Level
- Unknown
- Time with Product
- Unknown
- User Notes:
- Review by Mark of San Francisco, CA.
Mar 17, 2012Stick with the 80A!
Pros:Strong Construction,Quality Lenses
Cons: Comments:Not crazy about this filter.....at least in an 8" scope. I love the 80A, but this one seems too dark and is distracting with an overpowering blue "dyed" effect to the image. Perhaps better suited for a larger aperture scope.
Bottom Line: Would you recommend this item? NoThis review was provided courtesy of AgenaAstro.com
Sort by
