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 Post subject: IS - Image Stabilisers?
Unread postPosted: Wed Aug 31, 2011 4:18 pm 
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Joined: Tue Aug 26, 2008 1:27 pm
Posts: 16
Location: Joburg
Hi All,

I wanted to get some opinions on using IS.

Do you use it and when do you use it?

I read in a recent article that for birding photography when you are shooting at high shutter speeds it is better to not use IS at all. Rather to use IS in low light conditions when shutter speeds are slow and you are photographing stationary subjects.

I have a canon 100-400mm lens and have been taking all my photos with IS on (mode 1). But now Im rethinking leaving it off for my birding shots.

thanks


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 Post subject: Re: IS - Image Stabilisers?
Unread postPosted: Wed Aug 31, 2011 4:29 pm 
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Honorary Virtual Ranger
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Joined: Fri Jan 14, 2005 5:42 pm
Posts: 17943
Location: Red sand, why do I keep thinking of red sand?
Why no link to that article? I'd want to see their reasoning.
Especially as IS was introduced on long lenses first...

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 Post subject: Re: IS - Image Stabilisers?
Unread postPosted: Thu Sep 01, 2011 9:18 am 
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Joined: Tue Aug 26, 2008 1:27 pm
Posts: 16
Location: Joburg
It was an article by Albert Froneman and Chris van Rooyen in the Birds & Birding June/July issue (with Jacana on cover)...


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 Post subject: Re: IS - Image Stabilisers?
Unread postPosted: Thu Sep 01, 2011 10:07 am 
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Joined: Thu Jan 27, 2011 4:30 pm
Posts: 97
Location: A grey UK ! Longing to be in SA !
Hello FireFinch;

I too use the 100-400 (and other IS lenses) and have IS turned OFF most of the time! My given theory FWIW is that I don't turn IS ON unless it is 'required'. Most of the time it's not! IS is a solution to a potential problem (low light / low speed). If the problem doesn't exist - why use it, when doing so 'could' generate it's own problems...

E.g; For birds & other fast-moving subjects, the theory is that turning IS OFF improves the AF tracking speed of the lens. The camera's AF system is not fighting the lens' IS system, and is putting all it's power into doing the AF job.

HTH...

Cheers...

PS: Using Mode1 for moving objects is also the wrong mode anyway. S/be Mode 2 for use when panning. Mode 1 s/be used for static subjects; Mode 2 for moving subjects. Also; if you're using a tripod - always turn IS OFF anyway; again so it doesn't 'think' that it needs to be working! That's my theory at least :D


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 Post subject: Re: IS - Image Stabilisers?
Unread postPosted: Mon Sep 12, 2011 9:21 pm 
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Junior Virtual Ranger
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Joined: Sun Feb 13, 2005 9:42 am
Posts: 54
Location: Ballito, KZN, RSA
As I understand the manual what you say is correct.


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