Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-14-2012, 09:08 AM   #1
New Member

Join Date: Mar 2012
Posts: 10
Should mirror flop during optical/DOF preview on k-r?

Hi -
Quick query - should the mirror flop when using the green button optical/DOF preview on a k-r? It does so every time (sometimes more than once).
It does not do so on my K100D - is this a different design or a problem (the camera has just returned from repair for, uhhm, uncontrolled mirror flopping!)

05-14-2012, 11:12 AM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 47,263
No, I don't think the mirror should move at all.

Adam Webmaster (Site Usage Guide | Site Help | My Photography) server and development costs are user-supported. You can help cover these costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-14-2012, 11:25 AM   #3
New Member

Join Date: Mar 2012
Posts: 10
Original Poster
Thanks Adam - i've been looking around the forum and some seem to think that the k-r mirror is meant to.
There is a thread here
"The K-r has no aperture motor (the little bump in the K-5 body on the right side (left if you look onto the lens) of the mirror box. Therefore, it needs a second source to pull the aperture spring back. It is all part of a single mechanics which rewinds the shutter curtains, rewinds the mirror and pushes the mount's aperture lever. The K-7/5 needed to get an entirely new mirror box (new dampened mirror, new shutter, new aperture motor) to separate functions."

What I find a bit odd is that the old K100D doesn't seem to need the mirror to do this.
05-14-2012, 11:49 AM   #4
Site Supporter
Site Supporter
boriscleto's Avatar

Join Date: Dec 2009
Location: North Syracuse, NY
Photos: Gallery
Posts: 13,750
The mirror cycles with the K-x when you stop down, and I'm sure it does on the K2000 as well.

05-15-2012, 11:35 AM   #5
Veteran Member
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
Yes, it's one reason why Icould never consider the K-x for my own use: I use manual lenses with stop down metering all the time, and in quiet environments (jazz concerts) where all that extra flopping would drive me crazy. I had heard mixed reports on whether this was true for the K-r, but I tended to believe the reports that said it suffered the same flaw.

  • 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!
flop, mirror, mirror flop, optical/dof, pentax help, preview
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mirror flops and DOF preview problems? Neil Manson Pentax K-r 3 05-15-2012 02:46 PM
How to make sense of the DOF preview/Optical preview on the on/off dial ? photoleet Pentax K-5 5 04-17-2012 04:22 AM
Mirror Flop?? Billgscott Pentax K-5 8 11-21-2011 11:46 AM
Brief Word On Mirror Flop GarySloman Pentax K-5 16 11-13-2011 06:36 PM
Mirror cycling on optical preview, stopped-down movie recording bwDraco Pentax DSLR Discussion 10 09-12-2011 06:50 AM

All times are GMT -7. The time now is 12:31 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]