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September 10th, 2010, 08:18 AM
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Member
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17mm f2.8 IS question.
Hi! I've been switching lenses around a bit, and I noticed when putting the 17mm back on my e-p1, that the IS has a focal length setting for 16mm or 18mm, but not 17mm. Seems a bit odd... Does it matter? Is it best to set it at 16mm, or 18mm? Many thanks.
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September 10th, 2010, 08:33 AM
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Site Supporter
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The only time you need to set the focal length for the IBIS is when you're using a lens that doesn't communicate directly with the camera. The 17mm and all other native m43 lenses communicate with the camera and it sets the right focal length automatically. So you don't need to touch that setting - its not listening to you anyway! If you're using legacy lenses that don't have an electrical connection to the camera, THEN you need to set the focal length. But never for an m43 lens, whether an Olympus or Panasonic lens.
-Ray
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September 10th, 2010, 08:50 AM
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Administrator Emeritus
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1+ Thanks Ray
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September 10th, 2010, 09:20 AM
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Thanks very much Ray!
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September 10th, 2010, 09:50 AM
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Quote:
Originally Posted by Ray S
The only time you need to set the focal length for the IBIS is when you're using a lens that doesn't communicate directly with the camera.
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Clarification please: Would that include the Panny 20mm f/1.7? Or do you have to set the focal length, since it isn't a Zuiko lens???
Last edited by Rudi; September 10th, 2010 at 09:54 AM.
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September 10th, 2010, 10:09 AM
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Quote:
Originally Posted by Rudi
Clarification please: Would that include the Panny 20mm f/1.7? Or do you have to set the focal length, since it isn't a Zuiko lens???
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Ray said it right in his post.
Quote:
Originally Posted by Ray S
But never for an m43 lens, whether an Olympus or Panasonic lens.
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__________________
[ everythingsablur ]
Panasonic GF1 + LVF1
Native  : 20mm f/1.7, 14-140mm f/4-5.8 HD, 7-14 f/4
Legacy: Canon FD 50mm f/1.4 SSC
Flashes: Olympus FL-50
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September 10th, 2010, 10:37 AM
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Quote:
Originally Posted by everythingsablur
Ray said it right in his post.
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Oops, somehow I missed that bit! 
Makes sense, the is a standard after all, but thanks for the clarification!
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September 10th, 2010, 02:14 PM
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If I am using a 50mm lens legacy lens, do i set the focal length to 50mm or to 100mm due to the crop factor?
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September 10th, 2010, 02:24 PM
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Member
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Quote:
Originally Posted by riveredger
If I am using a 50mm lens legacy lens, do i set the focal length to 50mm or to 100mm due to the crop factor?
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The focal length is a physical property of a lens, that is, 50mm are 50mm on an Olympus E-P1, 50mm on a Nikon D90 and 50mm on a Canon 5DM2. Thus you have to set 50mm.
__________________
“To me, photography is an art of observation. It’s about finding something interesting in an ordinary place... I’ve found it has little to do with the things you see and everything to do with the way you see them.” (Elliott Erwitt)
pictor's Flickr photostream & Flickriver
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September 10th, 2010, 03:10 PM
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Administrator Emeritus
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Yes, as advised by Pictor....
Always use the actual focal length of the lens.
The camera adjust the confusion issue.
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