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GSO 1.25" Color / Planetary Filter - #80A Medium Blue

4.9 (7 Reviews) Read Reviews Write Review
Brand GSO
Part Number AD053
Availability available

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 #80A Medium Blue Filter is one of the most commonly used filters amongst the entire spectrum of filters. It is perhaps the best filter for the study of detail on Jupiter and Saturn. It enhances the contrast of rills and festoons in Jupiter's cloud belts, as well as details of the Great Red Spot. It brings out detail in Saturn's belts and polar features. The filter is very useful on Mars in showing the high clouds and ice caps, and is especially useful during the violet clearing.

When used on Mercury around twilight, it improves the surface markings, whereas for Venus it shows dark shadings in the upper clouds. You can even use it on double stars - try it on Antares, for example. It is also a very useful filter for the Moon. The blue filter also brings out gas tails of comets.

Reviews

4.9 (Based on 7 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      Review by Michael K.
      1535682175
      Aug 30, 2018

      5.0 great transaction, quick shipment, quality

      Pros:

      Cons:

      Comments:

      great transaction, quick shipment, quality product

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Richard K.
      1510383025
      Nov 10, 2017

      4.0 Basic blue filter

      Pros:

      Cons:

      Comments:

      I had discovered that my old blue filter had become damaged, so I ordered this one as a replacement. Looks and works well.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by david m.
      1501005910
      Jul 25, 2017

      5.0 Missing Piece

      Pros:

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      Comments:

      I had a 80a but not another blue. this works really nice on bright objects like the Moon, Saturn, and Jupiter. Cuts some of the glare. Really like it

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by James J.
      1497392936
      Jun 13, 2017

      5.0 GSO Planetary filters

      Pros:

      Cons:

      Comments:

      Upon receiving this filter I used it with a Tele Vue refractor to observe the Red Spot on Jupiter, along with detail within its cloud belts, and fine detail on the first quarter Moon. The filter enhanced contrast and detail. These are fine filters at a bargain price, well made and finished, and thread smoothly into all my eyepieces. I've added a few more colors to my arsenal. By the way, Agena shipping and fast service is the best.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Jim B.
      1484994114
      Jan 21, 2017

      5.0 Works for me...

      Pros:

      Cons:

      Comments:

      Another well constructed GSO product. The 1.25 color planetary filter seems to do it's job... even though I'm just a beginner... this filter seems to bring out the moon's details out much better than not having a filter on the eyepiece...

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    6. Stalker

      Stalker New Member

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      Review by Stalker of Rio de Janeiro. RJ.
      1267920000
      Mar 6, 2010

      5.0 Nice filter, nice price.

      Pros:

      Strong Construction,Quality Lenses

      Cons:

      Comments:

      I purchased the #80A Blue. It works fine with Saturn and Jupiter. No doubt, this filter is very good.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    7. zanti-misfit

      zanti-misfit New Member

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      Review by zanti-misfit of Enterprise, AL.
      1257724800
      Nov 8, 2009

      5.0 These are fun to use.

      Pros:

      Accurate,Compact,Strong Construction,Quality Lenses

      Cons:

      None

      Comments:

      I recently purchased one of these filters, the #80A Blue. I wanted to start with one that could be useful for a wide variety of objects and then narrow it down from there.

      As for the filter itself it's a good one. Solid construction with well made threading. Had no problem attaching it to all of my lenses. The glass was clean and scratch free. Excellent.

      I've used this filter on everything from viewing the moon to Jupiter and beyond. It's worked very well I must say, and enjoyed the enhanced images. You can see just a little more definition with certain objects, certain areas. I also like using this stacked with my moon filter. A nice effect indeed.

      These are well made and affordable. Be sure to do a little research to figure out what color you'll need for the targets you have in mind. They all offer a little something special, with some being more useful than others overall. But at these prices having them all wouldn't be a bad idea. That's my plan.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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