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Flats and Floppy Dew Shields

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#1 Devonshire

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Posted 20 June 2019 - 12:28 PM

I'm thinking of making a supplementary dew shield for my refractor, and craft-foam-and-velcro looks like it would be both effective and convenient. 

 

But... I doubt that it would support the weight of the panel that I use for flats, so I'd need to remove it for that, and place the panel directly on the scope while vertical (perhaps an inch or so from the lens). 

 

Wondering if others here have dew shields that won't support their flat gadgetry, and whether they've found that shield-on vs. shield-off made any difference to the quality of the flats?

 

Thx!

 

- Bob



#2 Dynan

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Posted 20 June 2019 - 02:04 PM

I take the dew shield off for flats. I use a light panel and set it directly on my OTA. The dew shield doesn't affect the focus or the alignment, the two things necessary for a good flat...other than proper exposure time.


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#3 Stelios

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Posted 20 June 2019 - 07:14 PM

Same here. I take the dew shield off. On my SCT, the flat panel is about a centimeter from the corrector. On my refractor it's about a cm from the objective. Not a problem.


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#4 Devonshire

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Posted 21 June 2019 - 07:52 AM

Thanks!




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