Something inside sliding when tipping the camera 90 degree up-right


Link Posted 03/06/2012 - 10:45
I notised something what I haven't berofe notised with my K-x. When I slowly tip the camera left (or right - doesn't matter) for 90 degrees until it's in up-right position, I hear very obvious noise of something sliding inside the camera body! That happens with power ON and also power OFF. I tested also Shake Reduction ON an OFF and the sliding sound is still there.

Any proposal how to test SR-system?

There has been some discussions before link

I'm interested the sound because I fell with the bike and the camera (K-x) was in camera bag in the bike basket. K-x seems to work right and picture's quality seems to be OK and K-x has no external signs of shocks.
Best Regards

"If your photographs aren't good enough, you're not close enough." - Robert Capa


Link Posted 03/06/2012 - 10:49
I still think it might be the SR. Even when switched on, it remains loose until you half press the shutter (which engages it).


Link Posted 03/06/2012 - 11:06
Actually just checked mine, even with SR on (hand symbol lit) there's still a slight clunk

edit- but not in live view, where you can actually hear the SR mechanism straining.
Last Edited by Pentaxophile on 03/06/2012 - 11:08


Link Posted 03/06/2012 - 11:44
I had always this noise on my K-x, .. and others have mentioned it in various forums. I think that must be related to the way K-x was designed and built, .. I mean some kind of "structural noise", then unavoidable I'm afraid
Sorry, no proposal how to test SR-system.
my flickr gallery
my PPG


Link Posted 03/06/2012 - 11:59
This is no doubt operational noise from the SR system. The instruction manual tells us to expect it and that it is quite normal.
Best regards, John


Link Posted 03/06/2012 - 12:06

Will (Pentaxophile), what are you mean by "edit- but not in live view"?

I made quick and dirty test with SR Off/On and here are results. Left is SR Off and right SR On:

Picture taken from the calender on the wall by hand held (without tripod), shutter speed 1/20s and aperture f5.6. Picture are cropped from full size image. According this test SR seems to work.
Best Regards

"If your photographs aren't good enough, you're not close enough." - Robert Capa


Link Posted 03/06/2012 - 12:13
Just a guess as SR might be correct but there could be a mechanism that tells the camera when it in landscape or portrait hence the 90 tip?
Pentax K-x, DAL f3.5-5.6 18-55mm,Pentax-A 50mm f2, DAL f4-5.6 50-200mm, FG360FGZ


Link Posted 03/06/2012 - 12:27
Thanks for reminding us - yes, there is an orientation sensor, but that's not big enough to clunk. The clunk is SR for sure.
Best regards, John


Link Posted 03/06/2012 - 12:36
Whether SR is on or off, the SR mechanism is in free motion, affected only by gravity, until the shutter button is half pressed. It's not until then that it is activated and it's electromagnetic system holds it in place.

So, you can expect it to make a noise, typically a dull thud, unless you are pressing the shutter release button.
Peter E Smith

My flickr Photostream


Link Posted 03/06/2012 - 12:38
johnriley wrote:
The clunk is SR for sure.

People keep saying 'it's the shake reduction'.

In case it's not obvious, it's actually the whole sensor assembly.

Simple to see - take the lens off, lock the mirror up, and look in through the front while you move the camera about. I haven't done this since I did it with the K10D, but I don't imagine it's much different.
Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
Last Edited by ChrisA on 03/06/2012 - 12:39


Link Posted 03/06/2012 - 12:45
It is the shake reduction technology. A good description of the system in the K100D is at the beginning of this article here -


Link Posted 03/06/2012 - 13:15
It is possible (on the K-5 at least) to see the effect of SR in Live View. The system damps high fequency vibration most obviously, so if you shake the camera quickly (and gently!), you can see the image float around slowly rather than shake. As expected this is more obvious with longer lenses.
PPG Flickr


Link Posted 03/06/2012 - 14:30
Whatever it is, its apparent as a dull clunk on the K10D and a tinkly sound on the K5. Doesn't effect the workings of either and in my case was there from new.



Link Posted 03/06/2012 - 17:30
As John said. IT IS THE SR ! Pentax. Pentax DA*300/4, Cosina 55/1.2, Lens Baby Composer Pro & Edge 80, AFA x1.7, Metz 50 af1.
Nikon. D800. D600. Sigma 500/4.5, Nikon 300/2.8 VRII, Sigma 120-300/2.8, Zeiss Distagon ZF2 21/2.8, Zeiss Distagon ZF2 35/2.0, Sigma 50/1.4, Nikkor 85/1.8, Nikon TC20EIII, Nikon TC14EII, Kenko x1.4, Sigma 2.0


Link Posted 03/06/2012 - 18:02
Surely that's just the standard sound of the orientation sensor?
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