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uhb1966

Light ingress through newtonian's back?!

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While doing darks, i realized one of the darks was a bright white. i was rummaging behind my newtonian w/ my headlamp on. Looks like light can pass thru the gap around the mirror?! What is the best way to avoid that?!

Best, U.

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Cover the back ( and front) or take your darks in the dark.

Regards Andrew 

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Posted (edited)

s5.thumb.jpg.3c8677e69c841ab924cd8f54ffefcc45.jpg

Hi

Easiest -and maybe best- a black shower cap.

HTH

Edited by alacant
foto
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Posted (edited)

@alacantGreat idea ;) 

@andrew s but who ever thought of covering the back end?! Not me😬

 

Edited by uhb1966

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13 minutes ago, uhb1966 said:

@alacantGreat idea ;) 

@andrew s but who ever thought of covering the back end?! Not me😬

 

If it can light will leak in anywhere there is a gap or opening.

Regards Andrew 

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I had the same issue with a 150 PDS, a cut down black bin liner and a piece of bungy cord sorted not just the darks and flats but improved the contrast in the light frames.

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On 19/06/2020 at 10:02, Grimbles said:

I had the same issue with a 150 PDS, a cut down black bin liner and a piece of bungy cord sorted not just the darks and flats but improved the contrast in the light frames.

@GrimblesI'll try that, thanks !

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