Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-04-2011, 03:12 PM   #1
New Member

Join Date: Jul 2011
Location: Nebraska
Posts: 1
A few maintenance/repair questions

I recently inherited a Pentax 645 that's been sealed in a Tundra case since 1999 and have found 2 issues.

1) The filter ring on the 75mm lens looks like it got smacked - it's out of round in one spot. Barely. Just enough that a filter won't screw on. Can that be fixed and is it expensive?

2) There was a black speck in the viewfinder. I removed the lens and the spot was on the focusing screen. Figuring it was just dust I tried a brush on it. It smeared so it apparently wasn't dust. Grease? Most of it came off with lens cleaner & a microfiber cloth but there is some in the circular grooves (?) on the focusing screen. Is there something a little stronger I can use on the screen to remove the grease from the grooves without damaging the plastic? I'd rather not remove the screen if I don't have to.

Thank you,


07-04-2011, 06:13 PM   #2
Site Supporter
glee46's Avatar

Join Date: Nov 2010
Location: North of San Francisco, California
Photos: Gallery | Albums
Posts: 596
Yes on the Lens

Do a search here on PF, on lens filter ring repair from the home page. I had one that had a major dent and was able to fix it for nothing. There are a number of ways to do it. One suggests to cut out the dent out with a dremel tool. The other requires to cut out the size of the lens on a 2x4. Then using a dowl to gently pound it back into shape. I did the ground and pound and now I'm able to put a lens filter on it with no problem.
07-04-2011, 07:09 PM   #3
bkpix's Avatar

Join Date: Feb 2010
Location: Creswell, Oregon
Photos: Gallery | Albums
Posts: 485
The grease spot on the screen may be the remains of rotting foam seals. I'd take the camera in for a professional cleaning, just in case, before it spreads.

  • 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!
dust, filter, grease, lens, pentax help, screen, spot
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Machinery Maintenance GhoSStrider Post Your Photos! 12 05-20-2011 12:52 AM
Basic Lenses Repair, Maintenance & Cleaning Kit glee46 Pentax SLR Lens Discussion 30 03-23-2011 02:31 PM
Machinery High on maintenance volley Post Your Photos! 6 04-29-2010 10:06 PM
News Site Maintenance Complete! Adam Site Suggestions and Help 15 10-20-2009 12:13 AM
News Server Maintenance Window / Site Downtime Adam Site Suggestions and Help 21 10-17-2009 11:00 AM

All times are GMT -7. The time now is 10:16 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]