Atik 414 Mono -problem

[Crooro]

Hello everyone! I have just changed the desiccant tablets and I see that I still have a clearing around the nebula (marked in white as in the photos). Previously the same thing happened to me, then sometimes I had no problems with this clear around. What is it about ?

[Crooro]

This is  problem 

[vince]

Hello Crooro,

Sorry to hear you are having problems, could you please send us a fits file of a cooled flat frame into support@atik-cameras.com so we can have a proper look? Then we can investigate further.

Best regards
Vince

[Crooro]

Thanks Vince
... I immediately send an email with ifile