Product Description
This economical 2" dark green filter makes an excellent moon filter as it reduces the moons glare by only transmitting about 24% of the light. This filter threads into your 2"-star diagonal. You can then use it with all of your eyepieces without having to move the filter from one eyepiece to the next. So, when you are ending your visual observing session and ready to sacrifice your night vision by looking at the moon, thread in the filter and enjoy cruising above the surface of our nearest neighbor.
While the 58A is also used as a planetary filter to enhance the cloud cover on Venus, Jupiter and Saturn, this filter significantly darkens the view. So, we do not recommend it as a planetary filter for Apo refractors under 152 mm.
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2"Moon Filter
Very Shallow treaths. It does not feel secure when attached to the diagonal. Stellarvue comment: I was concerned when I read your review so I inspected the filter. It has between two and three threads which is shallow. I then used our laboratory scale and weighed the filter. It is 0.6 oz. 2 1/2 threads are sufficient to hold something this light securely. This filter would not be used for stacking so I will continue to sell these based on my review. They are a very inexpensive way to view the moon without completely destroying one's night vision.
