I have put on a m42 adapter and I am getting really dark or underexposed blurry images. I am not sure if it because of a incorrect setting, incorrect focal flange, the m42 adapter and 44 Helios lens or I bought the r1mx with prior issues. any advice? my firmware is 32.02

Thanks for any help even if its in referring me to the person that could help.

-Sam Haboush