Author Archives: canonrepair

About canonrepair

Ruzsa János. Amatőr fotós, Canon DSLR váz. Amateur photographer. Canon DSLR user.

How to measure CMOS position with a dial gauge


Case You want to replace the shutter in a newer Canon camera, you will have to take out at first the sensor. And the sensor is positioned regarding to the flange NOT with the help of some adjustment washers, but … Continue reading

Posted in Canon camera, DIY, tools | 10 Comments

Optical alignment


Cementing a Doublet: Opto-Alignment Technology, Inc. https://www.youtube.com/watch?v=cl6K-EXPILo   SmartAlign for lens alignment and assembly processes https://www.youtube.com/watch?v=D6KDGPw4-y8   Canon EF Lens Plant – Lens Assembly Process https://www.youtube.com/watch?v=4Oyud3EA9kE   Lens Handler Operations https://www.youtube.com/watch?v=_eHnrxYyb5k

Posted in lens | Leave a comment

The mystery of NO FOCAL LENGTH on flash


The customer has got a used Tamron 17-50 F2,8 lens, and realized that using with a Canon strobe, there is no change on the strobes display, it shows always 17mm focal length. I was sure that there has to be … Continue reading

Posted in Canon lens, Tamron lens | 7 Comments

Canon 5d MkII – error code 20 : shutter…


… or not the shutter?!? One of my customers has a 5d MkII. Time to time the camera stopped working with error code 30 after shooting. This is a general error code: “ Err 30Description: A malfunction with the shutter … Continue reading

Posted in 5d2, Canon camera, shutter | 2 Comments

Solvent for the cemented lens (not with canada balsam)


Case You want to dismantle a glued (cemented) lens, try to use this: 70% dichlor-methane https://en.wikipedia.org/wiki/Dichloromethane 20% methanol and 10% ammonia solution (I think 40%). Be carefull, dont swallow them, they all are dangerous.. After ca 1-2 days of soaking, you … Continue reading

Posted in General topics | 2 Comments

Canon 40dcmos – with no Bayer-filter!


After long trials yesterday I managed to eliminate the complete Bayer-mask from a Canon 40d sensor. No scratches, no damage – just a beautiful golden mirror. Not very simple – and definitely NOT only by scratching it with a piece … Continue reading

Posted in General topics | 5 Comments

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