Telescope Dew Cap
About The Telescope Dew Cap / Lens Shield
A common problem for amateur astronomers is the amount of dew that can build up on the correcter plate of a telescope. This is easily overcome by the addition of a lens shade or dew cap, and which is designed to fit on the front end of the telescope to reduce the amount of dew.
What's more, it serves as a lens shade by blocking stray light from falling on the corrector plate, which improves the contrast significantly.
Regrettably even the sharpest telescopic views tend to be under precisely the same atmospheric conditions that cause dew to form. The first thing you will notice is that stars are harder to see and begin to form halos.
A quick check with a flashlight unearths wet haze covering the optics, which in severe cases may cause the entire scope to be soaked.
Trying to wipe the moisture away will probably only make things worse and could adversely effect the lens multi coatings. The answer to this dilemma is a lens shade.
The Celestron 94014 Lens Shade for Schmidt-Cassegrains (11 ") shown here is made from a lightweight flexible material and is compatible with all 11" optical tubes.
These caps use a thicker material and do not crack easily as some other manufacturer`s products tend to do. Being of a rugged material construction it really is top quality.
Being heavily seamed (not glued) it makes for lasting quality and velcro closures insure a perfect fit time after time.
- The Celestron 11" SCT Lens Shade was designed for Celestron 11" SCT telescopes and telescopes of similar diameter.
- Fit on the front end of the telescope to reduce the amount of dew that builds up on the corrector plate.
- The Celestron 11" SCT Dew Shield prevents stray light from falling on the corrector plate, which greatly improves contrast.
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