[MrNPhoto]

Had an interesting experience shooting with my K-3 today. I've set the RAW/FX button on my K-3 to turn SR on and off - convenient when using a zoom and you want to stabilize a shot at the long end. Never had a problem with this before today. When I went to press the RAW/FX button to turn SR off, the SR mechanism went into overdrive, vibrating very quickly, so the whole camera felt like a cellphone buzzing. It was a powerful buzzing, not gentle, and went about 2 seconds before I could turn the on-off switch to the "off" position. The vibration continued for another second after the camera was "off" and then ceased. Turned the camera back on, and resumed shooting as if nothing had happened. To be clear, the camera was not (to my knowledge) operating the shutter or mirror during this time, just vibrating. The vibration started immediately after pressing the RAW/FX button, and continued after the collar switch was set to "off". Firmware is 1.13, never had any mirror-flapping issues with the camera. Lens was Sigma 70-200mm f2.8 and lens OIS was off, and I had used the RAW/FX button to turn SR on, took some photos, and then pressed it again to turn it off when the SR vibration started. I continued to use the button to turn SR on and off without incident after that.

-Mike

[rawr]

Well, on the plus side, I guess now you have a very clean dust-free sensor.

[MrNPhoto]

Well, on the plus side, I guess now you have a very clean dust-free sensor.

The vibration was very strong - much stronger than when the dust removal feature is enabled. I didn't hear any other noises, such as clicks or snaps, just a strong 'bzzzzzzzzzzzzz'.

[max_pyne]

i experienced this exact same vibration (It shakes and makes a horrid sound) on my k5 yesterday, never happened before.. Not happened again....
i had the feeling it had to do with a wrong dial-in of the Focal length resulting in vibration. i had it ignored and added the A-2x-S rear converter on the FA* 400 but it was still set to 55 mm...
i'm feared in reproducing it...

---

Last edited by max_pyne; 05-05-2015 at 11:59 PM.

[JeffB]

Were you hand holding the camera or was it on a tripod? Using SR when the camera is on a tripod or even braced against a wall can cause the SR to fight against itself and actually created vibration!

[dicks]

Suggest to update to Firmware 1.20 anyway and see if it happens again...

[MrNPhoto]

Were you hand holding the camera or was it on a tripod? Using SR when the camera is on a tripod or even braced against a wall can cause the SR to fight against itself and actually created vibration!

The camera was handheld - no tripod or monopod. And the vibrations from normal SR activity are barely detectable - this was a strong shaking of the entire camera.

---------- Post added 05-06-15 at 01:24 PM ----------

Suggest to update to Firmware 1.20 anyway and see if it happens again...

Never had this problem happen before with v1.13 of the firmware. Will upgrade the firmware when the DFA 70-200mm is released.

[max_pyne]

had it on tripod (gimbal).

[Larrymc]

Had an interesting experience shooting with my K-3 today. I've set the RAW/FX button on my K-3 to turn SR on and off - convenient when using a zoom and you want to stabilize a shot at the long end. Never had a problem with this before today. When I went to press the RAW/FX button to turn SR off, the SR mechanism went into overdrive, vibrating very quickly, so the whole camera felt like a cellphone buzzing. It was a powerful buzzing, not gentle, and went about 2 seconds before I could turn the on-off switch to the "off" position. The vibration continued for another second after the camera was "off" and then ceased. Turned the camera back on, and resumed shooting as if nothing had happened. To be clear, the camera was not (to my knowledge) operating the shutter or mirror during this time, just vibrating. The vibration started immediately after pressing the RAW/FX button, and continued after the collar switch was set to "off". Firmware is 1.13, never had any mirror-flapping issues with the camera. Lens was Sigma 70-200mm f2.8 and lens OIS was off, and I had used the RAW/FX button to turn SR on, took some photos, and then pressed it again to turn it off when the SR vibration started. I continued to use the button to turn SR on and off without incident after that.

-Mike

Firmware 1.13? I just checked the Pentax site and there is no mention of ver. 1.13 is this a non US version or am I missing something? I am still using ver. 1.11 with no problems. Suggest you go back to at least ver. 1.11 until Ricoh updates to ver. 1.21.


Larrymc

[Larrymc]

Had an interesting experience shooting with my K-3 today. I've set the RAW/FX button on my K-3 to turn SR on and off - convenient when using a zoom and you want to stabilize a shot at the long end. Never had a problem with this before today. When I went to press the RAW/FX button to turn SR off, the SR mechanism went into overdrive, vibrating very quickly, so the whole camera felt like a cellphone buzzing. It was a powerful buzzing, not gentle, and went about 2 seconds before I could turn the on-off switch to the "off" position. The vibration continued for another second after the camera was "off" and then ceased. Turned the camera back on, and resumed shooting as if nothing had happened. To be clear, the camera was not (to my knowledge) operating the shutter or mirror during this time, just vibrating. The vibration started immediately after pressing the RAW/FX button, and continued after the collar switch was set to "off". Firmware is 1.13, never had any mirror-flapping issues with the camera. Lens was Sigma 70-200mm f2.8 and lens OIS was off, and I had used the RAW/FX button to turn SR on, took some photos, and then pressed it again to turn it off when the SR vibration started. I continued to use the button to turn SR on and off without incident after that.

-Mike

The only reference to ver. 1.13 is for the Pentax Q. Are you shooting with a Q or a K-3?

[stevebrot]

Firmware 1.13?

I was wondering the same thing...


Steve

[Larrymc]

I was wondering the same thing...


Steve

Yeah........I almost downloaded ver. 1.13 several months back until I realized it was for the Q series. I don't think his K-3 will perform well with that firmware....LOL


Larry

[stevebrot]

I don't think his K-3 will perform well with that firmware....LOL

...causes viewfinder blackout...


Steve

[MrNPhoto]

The only reference to ver. 1.13 is for the Pentax Q. Are you shooting with a Q or a K-3?

D'oh! Of course I meant v1.11 of the K-3 firmware. (My other camera, the K-7, is the one with v1.13 firmware).
Anyway, had the SR unit go bonkers and turning the camera off eventually caused it to stop (though the vibration continued ~1 sec after moving the switch to the off position.)
Never had it happen before (K-3 or K-7), and never had mirror-flap issue (the K-3 has always been used with v1.11 FW)

Didn't think to try looking through the viewfinder when this happened (i.e. to check if the mirror was up or not). Don't know if the SR unit would operate if the mirror was down.