The scratch right below the reflecting mirror on D600 (Part II)...

Started Nov 4, 2012 | Discussions thread
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Catalana Senior Member • Posts: 1,257
The scratch right below the reflecting mirror on D600 (Part II)...
3

Hi folks, the original thread started by 'Snapternity' has reached its limit of posts, so I'll continue with this...

First of all, I want to mention a big "CAUTION/WARNING" to those folks that do not have any experience wet cleaning. Please refer to the post that 'Prairie Pal' made at the end of the original thread:

http://forums.dpreview.com/forums/post/50191379

in which he describes observing the mechanical action inside the mirror box using the "Bulb" release mode. The part with the scratch/abrasion pivots down during shutter actuation, and then back up when the shutter closes and the mirror drops. It is like a little door that opens and closes, covering or exposing the pathway of light, that is responsible for the phase detect auto-focus operation.

Do not go poking around in that area. The 'door' is extremely sensitive and if prodded, can get misaligned. This may cause the 'door' to get stuck in a down position and you may not be able to auto-focus, since the light reflected from the secondary mirror will not reach the PDAF module. Trust me, I got a little fiber stuck in the gap, and that was enough to cause the 'door' to get stuck. Fortunately I saw it and was able to carefully remove it.

I have a fair amount of experience in electronics repair, and yet I skipped a few heart beats. All is well now. Please be careful when investigating, as I know that some will do. 

Just to report on the spots: I cleaned the sensor and most spots are gone. There are a few very stubborn ones, but they don't bother me one bit. The abrasion does not seem to have gotten any worse either, so I've gotten to the point were I am OK with this marvelous piece of gear.

 Catalana's gear list:Catalana's gear list
Pentax K-5 Nikon D600 Pentax smc DA 15mm F4 ED AL Limited Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO Sigma 70mm F2.8 EX DG Macro +10 more
Nikon D600
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