Canon 60d dropped down / false exposure metering

All photos were overexposed. I suspected, that the exposure metering unit has been damaged. After disassembling the camera, I have found this:


(it was not separated in this manner, but it was no more on its normal position on the transparent base. The sensor is pressed down by a metal clip, but in the same time held in place with to drops of glue. The glue has been cracked.)


The lens has to project the image on the matte on the matrix made of the  exposure measuring sensors. A small projector. This is the sensor matrix:

exposure block circle 

If it is not centered, the measuring will be of course false. The problem was, that the glue has been broken – so, how to get the right position?!?!?

Fortunately, on the surface of the transparent plastic remained a mark from the old glue.

exposure block arrow 

Red arrow the mark, blue arrow the glue itself (you can put them together, they will fit).

I positioned the sensor in the right position under a microscope, and then I applied two drops of my favorite Loctite 3090 glue (2 component cyanacrilic adhesive – hardening in 5 minutes…)

exposure glue


And the camera works perfect!


About canonrepair

Ruzsa János. Amatőr fotós, Canon DSLR váz. Amateur photographer. Canon DSLR user.
This entry was posted in Canon camera. Bookmark the permalink.

6 Responses to Canon 60d dropped down / false exposure metering

  1. Man you are my savoir! I have just rebuilt my 60D with broken mirrors (both!?!) that wrecked shutter flaps and ended between, shutter flaps and sensor in two pieces 😦 (thanks god sensor has only minor coating deffect).
    After assemblying camera back using whole new central frame with shutter assembly and mirror box there is no red dots highlighting focus points and all photos taken by viewfinder are at least +2 EV overexposed and even uncorrectly focused. Pictures taken in LV mode are perfect.

    But sadly I have no glue leftovers on the mounting points and I did broke back cover flex cable while disassemblying the thing fifth time so I have to wait for spare parts from china before solving this problem.
    Your blog is absolutely treasure chest for DIYers!

  2. Viktor says:

    Better use gloss acrylic varnish.

  3. canonrepair says:

    I think it does – but in this case it was no danger. I have seen the foggy coating in case of mounting a lens in a plastic tube, but I could clean it easily.

  4. Filip says:

    Does that Loctite cause fogging on the near by surfaces while curing, like other cyanoacrylate glues does?

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