I think SR causes image blur

Started Jan 10, 2013 | Discussions
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guzzibreva1 Contributing Member • Posts: 958
I think SR causes image blur
1

I have noticed that it is hard to get a razor sharp image unless I use a flash or tripod with long exposure with my K5. Shutter speeds faster than 1/200 are not usually a problem when hand held.

I can't help but think that since the sensor is mounted on a movable mechanism there would be a tendency for this to be subject to vibrations that occur faster than the gyro feedback from the SR system.

Has anyone else experienced this tendency?

Pentax K-5
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Simon Devlin
Simon Devlin Senior Member • Posts: 1,397
Re: I think SR causes image blur

guzzibreva1 wrote:

I have noticed that it is hard to get a razor sharp image unless I use a flash or tripod with long exposure with my K5. Shutter speeds faster than 1/200 are not usually a problem when hand held.

I can't help but think that since the sensor is mounted on a movable mechanism there would be a tendency for this to be subject to vibrations that occur faster than the gyro feedback from the SR system.

Has anyone else experienced this tendency?

At high shutter speeds or tripod mounting you are meant to switch the SR off.

I have no problem with SR even if I forget to leave it on!

Are you pixel peeping?

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Simon Devlin
Simon Devlin Senior Member • Posts: 1,397
Re: I think SR causes image blur

Ooooops, I have a K-30 btw.

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Simon
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guzzibreva1 OP Contributing Member • Posts: 958
Re: I think SR causes image blur

I always turn off SR and use time delay when using tripod. The results then are always good. It just that it seems quite often there is a blur in one axis when SR is on using the camera hand held. I am pixel peeping for sure but I like to make large prints and it does show then.

Maybe the problem is that I never had a camera with this high  resloution and small defect are more visible.

Nick Savoiu Senior Member • Posts: 1,631
Re: I think SR causes image blur
1

SR has a setup time for each shot. Use PhotoME to check if the shot was fully stabilized. Otherwise SR might not have been fully effective.

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DrewE Senior Member • Posts: 2,053
Re: I think SR causes image blur

Have you tried comparing shots with SR and without SR under identical circumstances?  I suspect you may well find that the non-SR shots are even more blurred.

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guzzibreva1 OP Contributing Member • Posts: 958
Re: I think SR causes image blur

I think I have found my problem.  If the camera has been somewhat motionless prior to the shot, the shake reduction is just as quick as auto focus. If I move the camera somewhat then take the shot the auto focus is too quick for the SR to be ready.

SRT201
SRT201 Senior Member • Posts: 2,392
Re: I think SR causes image blur

My initial experience with SR using a Kx was much the same.  If the setup time doesn't elapse you can get a blurry shot.  Fortunately the K5 setup time is a LOT shorter than the Kx.

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Giant Tsunami
Giant Tsunami Forum Member • Posts: 91
Re: I think SR causes image blur

guzzibreva1 wrote:

I think I have found my problem. If the camera has been somewhat motionless prior to the shot, the shake reduction is just as quick as auto focus. If I move the camera somewhat then take the shot the auto focus is too quick for the SR to be ready.

I went through this question myself, I am no lab tech but in the tests I did I found no difference if the factors were identical. I cared as you do becuase I often magnify the small detail in my shots (through cropping tho, not large print), so for me it was also very important, hence the reason I bought a IIs. I can say I now shoot with IS on all the time, and if it were going to show a flaw on any pentax camera, it would be the IIs. Any little thing shows on this camera as the sharpness ceiling is quite high. I would shoot away using IS and not worry, it will be no worse than having it off. The only downside I can think of is perhaps a small battery drain?

audiobomber
audiobomber Veteran Member • Posts: 5,354
Nope!
1

I've tested this many times. I get better results with SR when it's needed, and have found no ill effects when it's not needed. I use SR at all times except when on tripod. IOW, I use SR even with high shutter speeds, on a monopod and when panning.

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MonkRX Regular Member • Posts: 206
Re: I think SR causes image blur

guzzibreva1 wrote:

I have noticed that it is hard to get a razor sharp image unless I use a flash or tripod with long exposure with my K5. Shutter speeds faster than 1/200 are not usually a problem when hand held.

I can't help but think that since the sensor is mounted on a movable mechanism there would be a tendency for this to be subject to vibrations that occur faster than the gyro feedback from the SR system.

Has anyone else experienced this tendency?

I'll echo the rest of the group. SR and Auto Focus both need to be "ready" for a sharp image. Off topic, but SR on my K-x is slightly buggy too. I get tons of double images at certain shutter speeds.

Pentax could definitely use a little more R&D with the SR tech. It could use a fair bit more optimization.

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Petroglyph
Petroglyph Senior Member • Posts: 5,180
Re: I think SR causes image blur

After about 10K shots with a K5 I can say the SR always stays on for me.  (I have even left it on during video recording and I think it actually helped but that might be folklore.)  I was even hoping Pentax would start anti-aliasing the K5IIs by moving the sensor one pixel width around a square pattern during the shutter release.  Bet they've already thought of that.

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KRG1953
KRG1953 Regular Member • Posts: 254
Re: I think SR causes image blur

SRT201 wrote:

My initial experience with SR using a Kx was much the same. If the setup time doesn't elapse you can get a blurry shot. Fortunately the K5 setup time is a LOT shorter than the Kx.

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I am also a happy K-x user. But sometimes i also get a blurry pic. And when i analyse ths via Photome I also see Sometimes Not ready, or sometimes not stabilized. Both occur.

Esspecially when you take multiple shots of the same object several seconds after each other.

It takes time for the SR to get ready apperently. You can see this in the viewfinder but i mostly don't look at the symbol.

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Matthew Miller
Matthew Miller Senior Member • Posts: 1,310
Wait for the hand

guzzibreva1 wrote:

I think I have found my problem. If the camera has been somewhat motionless prior to the shot, the shake reduction is just as quick as auto focus. If I move the camera somewhat then take the shot the auto focus is too quick for the SR to be ready.

Yes. Half-press the shutter and wait. A green "hand" indicator will appear in the viewfinder when SR is ready. If you take the photo before that, SR can add additional blur.

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MonkRX Regular Member • Posts: 206
Re: I think SR causes image blur

+1 to the guy who never checks the "SR" ready symbol. I never look either.

There should be a custom menu option to have an additional "beep" when SR is ready. So you have confirmation of both AF and SR through visual and auditory senses. Or Pentax could simply perfect the SR system

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Simon Devlin
Simon Devlin Senior Member • Posts: 1,397
Re: I think SR causes image blur

MonkRX wrote:

+1 to the guy who never checks the "SR" ready symbol. I never look either.

There should be a custom menu option to have an additional "beep" when SR is ready. So you have confirmation of both AF and SR through visual and auditory senses. Or Pentax could simply perfect the SR system

I have to admit I didn't know that either!

+2

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awaldram
awaldram Forum Pro • Posts: 12,512
Re: I think SR causes image blur

MonkRX wrote:

+1 to the guy who never checks the "SR" ready symbol. I never look either.

There should be a custom menu option to have an additional "beep" when SR is ready. So you have confirmation of both AF and SR through visual and auditory senses. Or Pentax could simply perfect the SR system

How about a hand that pops out slaps you and a voice saying take the shot dummy

Seriously Pentax et al can only hold the photgs hand so much a certain level of ability has to remain the province of the human element else why not just get rid of this constantly failing part altogether (humanless images)

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bjake Regular Member • Posts: 327
Re: I think SR causes image blur

Used a K-X for about two years and found sr was good on handheld shots but turned it off when shooting flying birds and such.Shooting macro and close up was getting too many blurred pictures and found leaving sr off got a lot more keepers.It shouldn't have been setup time as I always shoot these all manual including focus.Got a K-5 a couple month's ago,not had a chance to check this out on it but will when spring comes,flowers bloom and bees fly.

SRT201
SRT201 Senior Member • Posts: 2,392
Re: I think SR causes image blur

Of course with the Kx you also have some serious, audible mirror slap going on.  I find my Kx is not really useful for long tele for that reason.  Sometimes I would get sharp, other times the slap was evident.

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SRT201
SRT201 Senior Member • Posts: 2,392
Re: Nope!

I will second that.  I have found SR to help at shutter speeds even above 1/500 with long tele lenses.

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