Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
11-04-2016, 08:23 PM   #16
New Member

Join Date: Nov 2016
Posts: 12
Hello, I have a similar if unrelated issue with my 6X7. Sometimes when winding the film advance lever the mirror will raise, when pressed, the shutter will release and mirror returns to rest position and the exposure of the film is not effected. The MLU works as designed when the camera winds on as properly. It's an intermittant problem but I've noticed the lever which operates the aperture is a little sluggish and if not fully up seems to engage the mirror mechanism when winding on, anybody see this before??

11-06-2016, 07:25 PM   #17
Veteran Member
Silent Street's Avatar

Join Date: Nov 2011
Location: Geelong & Richmond, Vic AUS
Posts: 591
QuoteOriginally posted by Denverdad Quote
Thanks for the replies. Here's my last "grasping at straws" attempt to solve the battery question: Is there any chance that the type of battery matters? The manual calls for a silver-oxide battery (which I know isn't made anymore), and I am using a Duracell lithium battery. What are you using, and does it matter?

Aside from that issue, I mentioned there were other problems. For one, although the meter "works" (in the sense that the needle moves) it is very inconsistent and the position can be changed by jiggling the camera about. Basically it is useless.

Also the prism doesn't seem to sit very securely on the camera - there is more play than what I would have expected. This may be due to bad seals (I assume there should be some, but its mostly just a sticky layer of gum left where the prism sits on its frame). I notice that the back has more "play" in it too, so it wouldn't surprise me if it needs new seals all around.

The last thing is something which seems really odd - the exposure counter dial appears to be on backwards (see the picture below)! It is clocked 180 degrees from what the manual shows and what I see in pictures online. So unless this is just some rare version of the camera I don't know about, I might think it is the result of a poor servicing attempt. I have not run any film through the camera yet to know if it affects proper film advance or frame counting or anything along those lines.

Finally I agree with you desertscape, I should try to return it. Unfortunately given the statements in the auction about "no returns" and "all sales are final", I don't think he will go for it. But the camera is hardly "fully functional" as stated.

Doesn't look like a professional reassembly job does it?
If the seller did not disclose this fault and the others you have noticed, you do have reasonable grounds to return the camera and seek a refund, irrespective of no returns or refunds. The camera was faulty when you received it!

Prism seals requiring replacement are a ghastly, sticky, gooey and tedious job. It can be done of course, but it needs a lot of time, patience and good old finger rubbing. It's even more of a pain to replace the seals in the channels.

I use a common alkaline 6V battery in my 67; silver oxide batteries of this type are less common here in Australia than seeing Noah in his Ark...

Last edited by Silent Street; 11-06-2016 at 08:01 PM.
11-10-2016, 02:14 AM   #18
New Member

Join Date: Oct 2016
Posts: 7
QuoteOriginally posted by Silent Street Quote
A related question is how the shutter holding solenoid gets "dirty" in the first place! The mechanism is very, very well sealed. A common belief is that the mechanism just gets tired, succumbing to that whether it is open or closed (open, operating, closed at rest). The thing is damned if it does and damned if it doesn't!
I think the dirt resulting from gear friction (for years) near the magnet sticks to it tightly when a camera is not in use for a certain period of time.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
6x7, battery, camera, medium format, mirror, release, shutter, thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax 6x7 winding lever stuck -- please help! sleepyhead Pentax Medium Format 3 04-05-2010 01:41 PM
6X7 mirror/shutter slap Gooshin Pentax Medium Format 21 01-15-2010 11:31 PM
mirror stuck in pz-70 ralfo Pentax Film SLR Discussion 0 10-28-2009 01:58 PM
6x7 MLU mirror and shutter stuck open mk07138 Pentax Medium Format 2 03-17-2009 03:07 PM
P30T, shutter will not reliably stay open on bulb with cable shutter control. skid2964 Pentax Film SLR Discussion 6 06-09-2008 08:04 AM

All times are GMT -7. The time now is 04:00 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]