I'm interested in seeing if anyone (I know bytor has one) is using a dew shield for a dob. Mainly interested in knowing what effect it has, and how it was made/what it is made of.
Also would a dew sheild help block out light? I have a light constantly on at night next door (back door light) which I would love to try and block out as much as I can (turning it off isn't an option).
Its really easy...I just went to my Local foam company and bought a matt black 5ml sheet of closed foam...it was $17 and will be heaps to make 3 shields if wanted......
A dew shield will temporarily slow down the dew process but as you have a Dob...you dont have to worry about the corrector plate like us SCT owners.......The dew shield will help with light polution from next door......it stops some of that unwanted light entering your tube.
dont know much bout these ken, I assume they only cut stray light out and not from the object the scope is pointed at right?
in which case your could probably get more contrast?
Yep in general dew isnt a problem for a dob style scope, although some large truss dobs users have a heater on their secondary mirror.
A tube extension however is a good idea for blocking stray light.
Stray light can be seen from the focuser from out the end of the tube in many dobs (including GSO dobs) and it can also illuminate the spider vanes which can also be seen from the focuser.
A nicely blackened tube extension will improve contrast.
I should of listened to Ian from NT from the start.....Just dropped into Sirus Optics and picked up a Orion flexible dew shield for my 10" for $45.....I am very impressed with the Quality as well....I will post a pic....
All others were marked $59 but this one was marked $45 so I grapped it......Looks very durable and is fitted with Velcro and a cushioning pad.....I know I just said it but it looks and feel great......
Look similar to the foam one I made but its nothing like it.
l know that the flexible shields are cheap but if anyone is interested l can custom make a rigid shield painted any colour you like any length you like for $120.00 + post eg: Perth $15.00, Q/Land $10.00.
