To bright Vmag on khi cyg

Hi Guys.

I have some images taken with the SSO Rigel telescope and one (or two) is just to bright for the current phase.
The Rigel telescope dosnt have a standard V filter but in their web page they claim that the error is abt 1%.

I have nearly 10% error.

My measurment on the 29/11 2012 is abt Vmag 12.1.

The comp stars are ok. So is the snr.

Is there any futer transformation that has to be done to get a correct Vmag?

I dont wanna upload faulty mags so ofc i will take it out from the db if its bad.

Could one of you guys take a look on my image. To whom would i share?

thanks .

Pierre from cloudyland sweden ...:)