8 replies to this topic

[CapPic]

Does anyone have any ideas for how I can improve this vignetting? Camera is an ASI2600mc. So far my tests have yielded wonderful images except for the extreme vignetting that is pretty much just one corner/edge.

 

I've attached a picture of a shot of an evenly lit wall

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[CapPic]

It's just one edge in this sub

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[sharkmelley]

Are you using flats?  How bad is your light pollution?

[CapPic]

Are you using flats?  How bad is your light pollution?

The first photo is essentially a flat. I've seen a number of first light posts for this telescope where people are saying no vignetting with an aps-c sensor, but mine is really bad

[sharkmelley]

I've seen a number of first light posts for this telescope where people are saying no vignetting with an aps-c sensor, but mine is really bad

How are you attaching the camera to the scope? Maybe that could cause worse than normal vignetting?

[CapPic]

How are you attaching the camera to the scope? Maybe that could cause worse than normal vignetting?

 

I have tried attaching directly to the conic connectors, without any other spacers. I have also attached via the reducer and have the same vignetting. I'm thinking it's an issue with the internal baffling or something 

[charles.tremblay.darveau]

Do you have an OAG? This could cast a shadow on the camera. The weird thing is that your vignette moves around.

[CapPic]

Do you have an OAG? This could cast a shadow on the camera. The weird thing is that your vignette moves around.

 

No OAG. The vignetting moves as I rotate the camera. 

[charles.tremblay.darveau]

Vignette would be normally circular. My guess is maybe you have a light leak. Check in the dark with flash light.