Monthly Archives: October 2017

Canon 7d – ERR20 – again and again


This 7d has been repaired a few months ago with an ERR20 error code after each shooting. ERR20 could mean many different problems, here is he internal ode: Interesting is, that, the internal error 215 is Mirror position problem, as … Continue reading

Posted in 7d, Canon camera | Leave a comment

AF problem? Adjust the zoom-brush!


A lot of used (and repaired) zoom lenses have autofocus problems, front focus or back focus. Case the lens has been disassembled before, the problem can be caused by the non-adjusted zoom-brush. What does the zoom-brush have to do with … Continue reading

Posted in 17-55 F2.8 IS, lens | 13 Comments

Nikon SB-24 flash repair


I have bought a Nikon SB-24 for a bargain price. I checked it, worked well.   …excepting the fact, that after 30 seconds the flash always went sleep.  From this mode was easy to wake up: just a short impulse … Continue reading

Posted in flash/strobe | 6 Comments