vignetting of ASA 3" corrector

[choi jong min]

Hi.

I use ASA N10 and 3" wynne corrector with QSI683wsg camera.

And I use astrodon 31mm filters. and adapter made by ASA for qsi683wsg.

When I took a picture with above system, there is vignetting on each corner.

I wonder that where the vignetting came from. Is it just vignetting or interference of ray path with adapter??

Here I attached raw image file (R channel, 300sec exp. 2bin), please some one analysis it 

Thank you for advance.

 

m3 -001r.fit

[MarkS]

The ASA10N/3"Wynne does not vignette noticeably with a KAF8300 size sensor.

I see no vignetting with a similar set-up, but I use 36mm filters. The adapter is 42mm i.d.

When checking for ray path obstructions remember that the rays are converging. I suspect the filters may be too small.

Mark

[Waldemar]

On 4/15/2020 at 3:21 AM, MarkS said:

The ASA10N/3"Wynne does not vignette noticeably with a KAF8300 size sensor.

I see no vignetting with a similar set-up, but I use 36mm filters. The adapter is 42mm i.d.

When checking for ray path obstructions remember that the rays are converging. I suspect the filters may be too small.

Mark

Or not close enough to the sensor...

[choi jong min]

Hi.

May I know the meaning that you told 'not close enough to the sensor'

Does it mean, distance between corrector and CCD ?

 

Thank you

BR JM Choi

[Waldemar]

1 hour ago, choi jong min said:

Hi.

May I know the meaning that you told 'not close enough to the sensor'

Does it mean, distance between corrector and CCD ?

 

Thank you

BR JM Choi

No, I mean distance between filter and sensor. Filter should be as close to the sensor as possible.

Edited April 20, 2020 by Waldemar