130pds light leakage?

[big bedroom]

When I try to take darks on the scope they never seem to work, when stacked with the subs in DSS I end up with a thin line in the histogram. They are fine if I take the camera off the scope and cover it.

This got me thinking about light getting in from somewhere, and is it affecting the subs?

The 130pds is my first experience with a newt and any advice would be welcome.

[Thalestris24]

Hi

If it's anything like my 150pds light can get in around the focuser and in the base. I cover the base so it's light tight. I suppose it's best to make darks libraries either in the dark or with the camera off and covered.

Louise

[lensman57]

When I try to take darks on the scope they never seem to work, when stacked with the subs in DSS I end up with a thin line in the histogram. They are fine if I take the camera off the scope and cover it.

This got me thinking about light getting in from somewhere, and is it affecting the subs?

The 130pds is my first experience with a newt and any advice would be welcome.

While imaging cover the area around the primary and around the focuser with a black material. Both my 150pds and Quattro 8s leak light like a sieve. Always take the Darks and Bias off the scope with the camera front sealed with the appropriate fixture, these are after all cheap, hobby Chinese made scopes.

A.G

[big bedroom]

Thanks for the info. I'll seal the focused base with gaffa tape and maybes a beanie hat held on the a dew strip for the bottom of the scope!

[elciv]

You don't need to take the darks on the scope. I actually put my camera in a bag in a windowless room, seems to do the trick.