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02-14-2012, 03:16 PM   #16
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QuoteOriginally posted by RonHendriks1966 Quote
Well I also have Sigam 70-200mm/f2.8 EX DG OS HSM and that is my only OS lens. I do like the panning mode 2 of IS in the lens. For me the SR in my K-5 is working better then the lens stabilisation. This is maybe mainly my way of working. Using sometimes my camera/lens on a monopod.

I have the idea that SR is faster then OS or am I wrong?
Probably a lot less mass to move, along with less distance to cover.

06-03-2012, 04:57 AM   #17
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I've been reading several related threads lately and I'm starting to think the answer may depend on the type of shot you're after. Some threads related to panning and SR seem to suggest that SR, particularly through the viewfinder, may introduce blur to panning shots. This seems to be less in Live-View and one member posted that was because in Live-View while panning, the sensor would be already at the extreme edge of it's ability to shift horizontally as opposed to when using the viewfinder when it will begin its shift during the shutter release. No idea how much truth there is to that statement but another member did post findings that panning+SR worked better in Live-View as well.

This makes me wonder a few things... like in that situation, would the OS on the lens outperform SR when panning and possibly also when shooting fast moving sports like hockey where you're constantly changing direction and tracking the puck (or leading it if you're really paying attention).

I would also agree that improved technique can reduce the difference and in reality negate the need for SR/OS at all if you're awesome. But for those of us still developing their skills, every edge helps increase the number of keepers.

Any insight from 70-200 OS owners would be greatly appreciated. It's an expensive lens and those of us considering whether to get an older non OS version or step up to buy the new one will definitely benefit from your thoughts, experimentation and images.
06-03-2012, 10:20 AM   #18
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As I get older, I'm finding it harder and harder to get clean shots with a long lens hand held. I can still do it but I no longer walk out of the house under the assumption that I'm going to came back home with a card full of usable shots without at least a monopod and I recently invested in a lightweight carbon fiber tripod. I have in the past had good handheld results as some very slow shutter speeds, 1/2 second with the kit lens and down to 1/30 with my Sigma 70-300. I no longer rely on my ability to hand hold my camera at slower shutter speeds. I don't own any of the Sigma OS lenses for my Pentax cameras (yet) but I have used the in lens stabilized Nikkors my daughter has and the results are pretty good and has the benefit of actually seeing the image settle down in the viewfinder. I had pretty good results shooting my daughter and her friends in the half pipe last winter on the Dew Tour. I made it a point to keep my shutter speeds above 1/500 and the K5 with it's high ISO performance delivered good results until I got really cold and had difficulty keeping the camera steady.

I think the OS will give most of us a little extra edge on occasion with a long lens and I am considering the 70-200 OS myself as I need a new AF telephoto. All this said, I'm not likely to go anywhere with a long lens anymore without some sort of camera support. The big problem with getting opinions on the forum about shake reduction is that everybody is different. What works for one person doesn't mean in any way that someone else will get similar results. There was a day when I shot handheld all day with a long heavy Takumar on a film camera. I can no longer duplicate those results. Read any photography book and they will all tell you that you will get your best results with the camera on a tripod. SR lets us work around that to a point.

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