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10-12-2014, 03:11 PM   #1
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Can't see through Pentax 645 viewfinder

I just purchased a Pentax 645 through ebay. I have attached my Pentacon 6 lens via an adapter. With the lens cover off, when I look through the viewfinder, all is black. Any opinions why? I can try new batteries but the lcd display does show when the camera is turned on.

10-12-2014, 04:06 PM   #2
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Have you put any film in? If you fire the shutter without film, the shutter will lock up. There's a special backing plate for the 645 that will allow you to test fire the shutter, but my advice is to forget about the camera entirely unless film is loaded.

---------- Post added 10-13-14 at 12:19 AM ----------

P.s. I went through this nightmare when I first got my 645. You're probably going to lose the first roll of film (or more accurately, it'll think you're halfway through a roll when you load it, and the first 10 won't come out, but will keep firing until exposure 25, so you will get a roll in total, just not the shots you expect!).

Iirc, when I had the problem I had to take the lens off, and *carefully* bring the mirror down into place by hand. It occasionally locked again over the first couple of rolls, but has been fine ever since. Touch wood, hopefully it's the same problem..,

Don't fire that shutter ever!!! (Unless there is a film in there)
The electronics get confused!

They work great if you stick to that rule (even when firing with the backing plate in, I had problems, so don't bother!)

---------- Post added 10-13-14 at 12:21 AM ----------

P.p.s. Try new batteries anyway. The 645 starts mis behaving if the batteries are low, so it's best to rule that out if you can.
10-13-2014, 02:17 PM   #3
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Thanks, that solved the problem.

I was able to drop the mirror and (hopefully) won't have much of a problem with it once I start shooting. I also did put in new batteries just to be sure.
I'll also make sure that I only shoot lousy pictures for my first roll of film. That way I won't be disappointed if they don't all show up. Thanks robthebloke for helping.

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