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Canon FTbn clues: cannot see the aperture needle

Started by Aphototaker, Dec 31, 2009, 10:02 PM

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Aphototaker

Dec 31, 2009, 10:02 PM Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
Hi.
 
Continuing with the Canon FTbn camera that I mentioned in my previous thread, I have put in a new battery (hearing aid battery: Duracell #675) and I can see the meter needle mode.
 
I did a battery check and the needle moves above the in

Rick_oleson

Dec 31, 2009, 11:13 PM #1 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
that's not a good sign ... there is no position at which it should become invisible.

Aphototaker

Dec 31, 2009, 11:49 PM #2 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
If I take off the top of the camera, what should I be looking for for this particular potential problem?
 
On a related note, any URL which describes how to take the top off this camera?

Aphototaker

Jan 01, 2010, 04:05 AM #3 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
Okay, got the instructions in the archive here on how to take the top off. Also some hints on how to remove the meter.
 
However, I am not still not clear what to look for when I open the top cover to find out what is wrong with the aperture need

Rick_oleson

Jan 01, 2010, 04:36 AM #4 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
This will be located below the prism and above the focusing screen, and just below the bottom of the light meter movement, which will be near the rewind knob to the left of the prism.  Beyond that I'm not sure how it's constructed, I don't thi

Aphototaker

Jan 01, 2010, 01:18 PM #5 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
Rick, thanks.
 
I am planning on opening the camera today or tomorrow to see if I can find what is the matter with it. I will give feedback here on what happens.

Aphototaker

Jan 02, 2010, 03:21 AM #6 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
Okay, got it.
 
I opened the top and while trying to remove the prism noticed that the ring (of the aperture needle, actually the needle itself) was lying just on top of the prism!
 
Now I have the prism out, and also the three screws from

Aphototaker

Jan 02, 2010, 04:40 PM #7 Last Edit: Sep 20, 2024, 01:10 AM by smf_adm
Guys, with a lot of help from this forum, the problem is solved.
 
I just glued back the aperture needle, that I found in the camera body, to its metal base. It may not be glued back in the precise position, but as far as I can make out,