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07-29-2009, 02:25 PM   #16
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I thought Initially SR was operating correctly (can't be certain), I noticed the problem when I put the Sigma 10-20 ex dc lens on


Last edited by raywheeler; 08-04-2009 at 02:15 AM.
07-29-2009, 03:41 PM   #17
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are you sure you are doing it right

Dave
07-29-2009, 05:23 PM   #18
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QuoteOriginally posted by raywheeler Quote
I am having some problems with the SR function.
It seems that with SR on I am getting very Blurred images, but with it off the image is pretty sharp.
I am using the pentax lenses that came with the kit.
But I also have a Sigma 10-20 ex .....
The camera was working fine initially, then when I put the sigma lens on the camera I noticed the blurred image with SR on. From that point forward the same effect is happening with the Pentax lenses as well.
Is it possible for a lens to affect a camera function in that way?
does anyone think a Firmware update might fix it?
Ray, I don't think you are alone in this. I started to notice similar problem with my K7 picture as well last weekend, especially low light in door stuff. Mine is not as blur as the example you shown.

My pic with SR on is slightly blurred, and no SR is sharper. Normally this is when i shoot at around 1/25s and below. Yes.. the hand is on before I shoot.

My typical low light shooting condition is ISO 1600-2000, F1.4, and 1/10-1/50s, so it is quite extreme.

Under normal outdoor condition, all is well.

I've tried quick a few lens... like FA* 85, FA 43, DA* 60-250m, Sigma 30 1.4. Never notice this issue with all my other cameras. Seems like SR is over compensate?

Maybe I'll try to reset everything to factory setting and see whether that will cure the issue.

Mike
07-29-2009, 09:54 PM   #19
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mcjm78 and the OP, doesn't the K7 (and K200D) manual say (p-132 K7 manual) that 'The Shake Reduction function may not fully work when shooting with a slower shutter speed...'.

It also reminds us that Shake Reduction may not work when taking close-up shots.

07-29-2009, 10:42 PM   #20
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I've not read my K7 Manual... too busy shooting.. :P

The funny thing is.. I can actually get a sharper picture when i turn the SR off in K7. That happened to me last night where I had dinner in a dim restaurant.

I still have my K20, Gx20, and K10 with me. What I can say from experience is those cameras never made me doubt the SR effectiveness when i need it for super low light work.

Hopefully Op and myself are the rare cases around here.
07-29-2009, 10:57 PM   #21
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I've had a few weird blurred shots which left me wondering whether the SR had kicked in when taking the shot.
Most of the time the K-7's SR behaves about as expected - I've had effective shots down to 1/8 s at 50mm focal length.

This thing about SR not fully functioning at really slow shutter speeds is true. When I do a wide angle shot - 18mm- 30 mm, down to 1/4 seconds shutter,the SR still helps but doesn't give level of shutter speed advantage. SR Seems to work best above 1/10 seconds., most effective with Telephoto lenses.
07-30-2009, 12:35 AM   #22
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I think my shake problem is a not just in low light, I first noticed it taking a pic in daylight in "green Button" mode fully Auto with my 10-20 Sigma lens.

I have not posted this shot anywhere but the shake was really bad, this just should not happen in full auto mode.
07-30-2009, 02:08 AM   #23
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If you are getting blurred shots in typical daylight shutter speeds, thats really not a normal function. I would suggest returning the unit to Pentax to be checked out.

07-30-2009, 02:17 AM   #24
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If you turn on Live View, what does the scene look like on the LCD? Does SR appear to be damping the motion, or amplifying it? If you turn on live view, you can see exactly what the SR is doing.
07-30-2009, 04:42 AM   #25
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With Live view the image does delay as you move the camera about and you can hear the sensor being moved. The strange thing is I get a sharp image when I take a shot in live view.
I initially thought that SR must be turned off when you go into live view hence the sharper image.
07-30-2009, 07:12 AM   #26
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QuoteOriginally posted by rawr Quote
mcjm78 and the OP, doesn't the K7 (and K200D) manual say (p-132 K7 manual) that 'The Shake Reduction function may not fully work when shooting with a slower shutter speed...'.
Isn't that sort of the whole point of being able to stabilize the shorter focal lengths? If you're shooting a 35mm lens then by the time you really *need* stabilization you will be shooting at 1/30 or slower...
07-30-2009, 07:53 AM   #27
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QuoteOriginally posted by pingflood Quote
Isn't that sort of the whole point of being able to stabilize the shorter focal lengths? If you're shooting a 35mm lens then by the time you really *need* stabilization you will be shooting at 1/30 or slower...
1/30 secs down to 1/10 secs is a breeze for the Pentax SR.

It gets ineffective down to 1/5 secs or so...I suppose there's a limit where the mechanism just can't compensate anymore.
07-30-2009, 01:35 PM   #28
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i'd send it back and get it replaced.
08-14-2009, 06:01 AM   #29
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The K-7 has been returned to Pentax and I am just waiting for the replacement. :ugh:
09-04-2009, 01:43 AM   #30
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Hi all just to complete the story here.
I got a replacement K-7 from Pentax a couple of weeks back, and I sent my Sigma 10-20 lens off to Sigma to be checked. Sigma said that they could not find a problem with the lens but would change the electronics in the lens (free of charge) because it could only be the electronics causing this sort of problem. Well I got the Sigma 10-20 back yesterday and took a deep breath and put it onto the K-7. I took half a dozen shots with the lens and it all seems to be working fine, what a relief
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