[vignetting of ASA 3" corrector]

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

[vignetting of ASA 3" corrector]

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