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08-11-2015, 09:22 AM   #16
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QuoteOriginally posted by audiobomber Quote
[*]SR has no effect, positive or negative, at high shutter speeds (i.e. higher shutter speed than 1/(effective focal length)[/LIST]
Regarding this item, I remember seeing a pretty long post on DPR regarding using SR at high shutter speeds, that it was detrimental.
However, as happens quite often, the thread became gigantic and turned into a p1ssing match so I did not know if there was a resolution.

So just to make sure, your testing shows that SR at high shutter speeds doesn't have much of an effect one way or an other?

08-11-2015, 09:29 AM   #17
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QuoteOriginally posted by cali92rs Quote
So just to make sure, your testing shows that SR at high shutter speeds doesn't have much of an effect one way or an other?
Correct, my testing over a period of years, with a K100D Super, K20D and K-3, shows no difference between SR ON and OFF at high shutter speeds. Try it for yourself. Shoot sequential images with a sharp lens, SR on and off in bright sunlight, where shutter speed is not a factor. Pixel peep to confirm, there's no effect, even at 24mp with no blur filter.
08-11-2015, 10:42 AM   #18
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QuoteOriginally posted by audiobomber Quote
Correct, my testing over a period of years, with a K100D Super, K20D and K-3, shows no difference between SR ON and OFF at high shutter speeds. Try it for yourself. Shoot sequential images with a sharp lens, SR on and off in bright sunlight, where shutter speed is not a factor. Pixel peep to confirm, there's no effect, even at 24mp with no blur filter.
My experience includes the K100D Super, K50, K3 - and not quite as rigorous a set of tests but the same results.
08-12-2015, 04:38 AM   #19
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QuoteOriginally posted by pathdoc Quote
Once I realised that in no way were my shutter speeds coming anywhere near blur-inducing (even at ISO 80 and stopped way down, they were faster than 1/180 and my longest lens was a 135)
1/180 sec. at 135mm is no way near a safe speed, it's right there on the limit. It should work if you are careful, but you still have to be careful.

08-12-2015, 04:59 AM   #20
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QuoteOriginally posted by audiobomber Quote
I believe the shot will be spoiled if it is taken during the fraction of a second that the SR is spooling up.



08-12-2015, 05:43 AM   #21
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QuoteOriginally posted by Gimbal Quote
1/180 sec. at 135mm is no way near a safe speed, it's right there on the limit.
1/180 was about as slow as it got in the bright sunlight; mostly it was significantly faster than that.
08-12-2015, 08:50 AM   #22
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QuoteOriginally posted by kh1234567890 Quote



1/25th of a second is pushing things unless you and your subject are fairly still. Was this during SR wake up? Did you get a shot after at the same shutter speed and conditions that was better? Wild looking - despite the focus blur I like it. It has a frenetic quality to it.
08-12-2015, 09:44 AM   #23
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QuoteOriginally posted by UncleVanya Quote
1/25th of a second is pushing things unless you and your subject are fairly still. Was this during SR wake up? Did you get a shot after at the same shutter speed and conditions that was better? Wild looking - despite the focus blur I like it. It has a frenetic quality to it.
That was a K-7 with the kit DA18-55WR at 18mm, shooting from the hip. Weird. EXIF claims 0.7sec shutter press and SR lock. And I did not zoom in/out during the exposure. Strangely the centre is reasonably in focus without motion blur. I doubt that I could repeat the shot

08-12-2015, 09:57 AM   #24
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QuoteOriginally posted by kh1234567890 Quote
That was a K-7 with the kit DA18-55WR at 18mm, shooting from the hip. Weird. EXIF claims 0.7sec shutter press and SR lock. And I did not zoom in/out during the exposure. Strangely the centre is reasonably in focus without motion blur. I doubt that I could repeat the shot
I wonder if the center is blur-free because the center part of the sensor is the pivot point for the SR mechanism?
08-12-2015, 10:06 AM   #25
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At least the K-7 SR could cope better with panning. The K-5ii loses SR lock at the slightest provocation if you pan - sometimes with strange effects :


08-12-2015, 12:35 PM   #26
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QuoteOriginally posted by kh1234567890 Quote
That was a K-7 with the kit DA18-55WR at 18mm, shooting from the hip. Weird. EXIF claims 0.7sec shutter press and SR lock. And I did not zoom in/out during the exposure. Strangely the centre is reasonably in focus without motion blur. I doubt that I could repeat the shot
Neat. But I'm confused because on Flickr it showed 1/25th.
08-12-2015, 01:40 PM   #27
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QuoteOriginally posted by UncleVanya Quote
Neat. But I'm confused because on Flickr it showed 1/25th.
Shutter speed was 1/25. 0.7 sec was the length of the shutter button half press which gets recorded in the makernotes section of the EXIF. Should have been just long enough for SR lock.
08-12-2015, 01:47 PM   #28
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QuoteOriginally posted by kh1234567890 Quote
Shutter speed was 1/25. 0.7 sec was the length of the shutter button half press which gets recorded in the makernotes section of the EXIF. Should have been just long enough for SR lock.
(Sound of hand slapping forehead)
Oh! Got it.
08-13-2015, 06:45 AM   #29
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QuoteOriginally posted by kh1234567890 Quote
That was a K-7 with the kit DA18-55WR at 18mm, shooting from the hip. Weird. EXIF claims 0.7sec shutter press and SR lock. And I did not zoom in/out during the exposure. Strangely the centre is reasonably in focus without motion blur. I doubt that I could repeat the shot
I doubt SR had anything to do with this weird effect. I would chalk it up to panning at a subject that is moving towards you with an angle. Parts that are far away will appear to move slow and parts close to you will move faster, thus it is impossible to pan at speed that will catch the whole subject in focus. Your panning speed will only match at one distance to the subject, which in this case seems to be those yellow things.

The second photo seems ok to me.
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