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02-03-2014, 07:31 AM   #1
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sr k5

just wanted does sr work with sigma lens ?

02-03-2014, 07:36 AM   #2
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SR is integrated inside the camera. It works with my grandfather's pre-world war 1 era lenses.
02-03-2014, 08:03 AM   #3
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QuoteOriginally posted by crashmars Quote
just wanted does sr work with sigma lens ?
Do you think of Sigma lenses with built-in image stablisation?

Or do you mean Sigma lenses without that feature? For such lenses, the in-body Shake Reduction (SR) of the K-5 will work for all types of K-mount and M42 lenses (up to 800mm of focal length) no matter what their brand name is.
02-03-2014, 08:05 AM   #4
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If the lens has SR, usually you'll want to use that and turn off the in-body SR. Don't use both together.

02-03-2014, 08:44 AM   #5
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To sum up:
The in-body SR will work with any lens (or even with a roll of toilet paper held in front of the camera). The SR depends on the lens' focal length, and older lenses (and some third party lenses, like Samyang) don't have the contacts to tell the camera their focal length. In that case, you need to input it manually. You want to type in the exact number written on the lens, or the closest wider number. You will be automatically asked the focal length when you turn on the camera and it detect a lens without contacts (but SR must be enabled for it to ask). You can also go into menu and input it there.
Then the camera knows the focal length and will try to compensate for it! Even if you don't even have a lens mounted, it just trusts you.

However, some lenses have in-lens stabilization. I don't think any Pentax brand lens has this, but some Sigma lenses do, especially tele zooms. Different brands have different names for this feature, but check it out so you know what you are buying. In-lens stabilization is not bad, especially with tele lenses, but you must disable one of the stabilizations! If you have both in-lens and in-body active, they will fight each other and might ruin your photos. So with a lens like that, you have to decide which stabilization you prefer, and then use only that one.
02-03-2014, 08:48 AM   #6
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And from what I've read, the in-lens SR works better than in-camera for longer lenses. If you have something like a 150-500 definitely use the in-lens function. It will drain the battery faster, just be aware of this and plan accordingly.
02-03-2014, 09:45 AM   #7
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all the answers I needed thanks for fast responds
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