Quote:
If your primary scope is the 8" solid tube DOB then I seriously doubt that you are going to need a dew shield
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You'd be surprised Darren! These type of dew shields work to:
1) Stop stray light entering the focal path
2) Stop the secondary from getting fogged up
3) Prolong the time before the primary gets dew on it
The GS dobs have their secondary mirrors quite close to the end of the tube, so secondaries fogging up and stray light are common problems.