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Old Jun 16, 2011, 3:20 PM   #1
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Default Setting IS focal length question

When setting the focal length/under the IS menu item, would I set it for the f/l of the lens- or the effective f/l- in other words-
With the kit lens, I'd set it for 40 (there's no 42)... or 80mm 35mm effective?
with a 100-300mm zoom, I'd set it for 300- or 600 effective?
with a 50mm lens from a 35mm camera I'd set it for 50??? or 100 effective?
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Old Jun 16, 2011, 9:19 PM   #2
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it is the actually length not the crop you want to enter.
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Old Jun 16, 2011, 9:48 PM   #3
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Quote:
Originally Posted by Wes James View Post
When setting the focal length/under the IS menu item, would I set it for the f/l of the lens- or the effective f/l- in other words-
With the kit lens, I'd set it for 40 (there's no 42)... or 80mm 35mm effective?
with a 100-300mm zoom, I'd set it for 300- or 600 effective?
with a 50mm lens from a 35mm camera I'd set it for 50??? or 100 effective?
Hi Wes,


The only time you need to enter the focal length to attain IS is when mounting a legacy lens (manual focus) onto the camera body. Since the lens cannot communicate to the body, you have to input that info, i.e. 50 for a 50mm lens.
Forget the crop factor.

When using any of the Olympus m43 lenses, the camera recognizes the lens and automatically adjusts. So, no user input in required.

Zig
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Old Jun 17, 2011, 7:37 AM   #4
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Thanks for the info, Guys... I should have thought about the camera recognizing the lens! That's good- will cut down on the number of trips into the menu's.
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Old Jun 17, 2011, 10:21 AM   #5
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Yes, when using micro-specific lenses that menu screen is usually grey-out anyway, meaning the camera is doing the work because it can "talk" with the lens.
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Old Jun 17, 2011, 10:23 AM   #6
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That's clear in case of primes. However, what if it's a zoom lens (i.e. 70-300mm)? Which FL should be entered?
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Old Jun 17, 2011, 11:14 AM   #7
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That's clear in case of primes. However, what if it's a zoom lens (i.e. 70-300mm)? Which FL should be entered?
If it's a micro 4/3rd's or DSLR 4/3rd's lens, the camera takes care of it.
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Old Jun 17, 2011, 12:36 PM   #8
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I'm talking MF lenses, not 4/3 or m4/3.
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Old Jun 17, 2011, 2:00 PM   #9
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You would just have to guesstimate it and dial in something as close as you can. A royal PITA is what it would be. I'd be very tempted to just use a lens like that with IS turned off.
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Old Jun 17, 2011, 2:07 PM   #10
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Tullio-
I'm with you, as I have a very clean old late '70's Wolfpro 85-210 zoom lens that I'd like to use. That is part of where my question was directed originally. And obviously, with a lens like that the IS would certainly be very desireable!
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