Home Dew Shield

[EdskiMax]

So i'm expecting to take delivery of my 200p Dob soon.. I'm interested in making an non heated dew shield.. I know alot have been using camping mat.. Personally I think they are a little to thick & can seem crude looking.. I wonder if anyone knows roughly what size of foam sheeting i would need to cover a 8"" tube with about 40cm in height.. Would stitching velcro on either end be suitable for securing it..

[Gina]

Putting my mathematician's hat on... multiply the diameter by Pi (3.142) to get the circumference. So that's just under 25" or about 630mm. Actually the tube of a 200P scope will be more than 8" but I don't know the exact size.

I think velcro would be fine to secure it.

[Adz]

Further to my picture comment, you can find more help here:

http://stargazerslounge.com/member-equipment-reviews/140240-skywatcher-skyliner-200p-unboxing-building-some-add-ons.html

i have also posted a link where to buy it from

hope that helps

[EdskiMax]

Thanks Gina.. Yeah, so something in the regions of 70x40 cm.. Would be the size i'm looking for.. Alot of the craft foam is small sizes.. The camping mat just seems too thick for my likings.. Back to google i go...

[Adz]

Economy Neoprene Rolls | Homecrafts.co.uk

[EdskiMax]

Further to my picture comment, you can find more help here:

http://stargazerslounge.com/member-equipment-reviews/140240-skywatcher-skyliner-200p-unboxing-building-some-add-ons.html

i have also posted a link where to buy it from

hope that helps

Thats top notch Adz.. Your a gentleman.. Thanks!!

[Adz]

No problem glad to help, if you need any other help with sizes of measurements I am sure I can find a tape measure for mine some place...

I read somewhere that 2.5x the aperture of your scope was the rule of thumb. I did that with mine but really its overkill.

[EdskiMax]

I seen people talking about 40cm for a 10" - I want it mainly for a few stray street lights, kinda low on the left side of my garden.. is that shield just Velcroed together & slid over the top of the tube?

[Adz]

Yup that is the way. Adjustible if the neoprene decides to become a bit loose after time. Mine is doubled up in case you didn't know.

With a space square as well I would recommend putting it inside your mount to stop the tube ota banging on the wood. Its in my thread.

[EdskiMax]

Yeah i seen that square on the mount.. Tidy job.. I was thinking about doubling the dew shield up with a coloured sheet on the outside, black on the inside? Is one roll of each colour enough?

[Adz]

Thanks, doubling up is a good idea yeah. The neoprene is a little too giving if used singly for anything more than something like a telrad shield. I only got one roll of the black and there was enough to double up on the dew shield, make 2 more for my binoculars, the little protective square and some left over

[EdskiMax]

Happy days.. That sounds like a plan.. Yellow on the outside, black on the inside.. Quite fancy that yellow & black camouflage foam for a telrad shield too... Spice it up a bit..

[EdskiMax]

I'm thinking if i measure one roll.. cut the other colour the same size.. spray mount them together.. That should make it thicker & make it look like one piece of foam..

[Adz]

Nothing wrong with a bit of colour...in the dark and your lounge...

[EdskiMax]

I'll be rolling this thing out onto the patio like Elton John in Rocketman - Haha!! Thats if it ever gets back in stock..

[Adz]

I wish you luck mate, be sure to keep us informed on your progress with the awesome 200p