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Old Apr 16, 2011, 4:40 PM   #11
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nope, it was also used for medium format as well with their lenses back in the days when Medium Format was used widely. And on 35mm, the lens that is 28mm is 28mm. With crop, a 14mm lens is 14mm lens.
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Old Apr 16, 2011, 4:48 PM   #12
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A 14mm lens on MFT (2x) is certainly 2x easier to shake than on FF (1x).
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Old Apr 16, 2011, 4:58 PM   #13
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That rule was around with different size film long before the internet. Medium format used it to and a 100mm lens in medium format was the same length as a 100mm lens in FF. As shake is uniform, factor crop does not affect it. You have a 100mm lens on both a ff or aps-c. As you crop into the photo with the computer, they have the same uniform level of shake.

What you do see is high distortion as you get higher and higher mount of resolution with higher megapixel cameras.
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Old Apr 16, 2011, 9:46 PM   #14
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As far as shakiness is the concern, what matters is the effective focal length. For another example, if ETC mode is enabled on a GF2, the 14mm lens becomes very shaky, because the effective FL is now 14x2x3.1=87mm.

I.e., crop fact must be included when talking about this rule. Whether the rule was made for 1x, 1.5x, 1.6x or 2.0x, is another story.

I won't reply to your further posts on this regard, I've said it very clearly.

Last edited by sdcs; Apr 16, 2011 at 9:57 PM.
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Old Apr 17, 2011, 12:03 AM   #15
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Because you can not account for the fact the medium format used the same rule and so did 110 film.
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Old Apr 17, 2011, 10:31 AM   #16
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This was interesting to me to discern the differences of opinion here and what the actual answer is to it. I found an article that confirms what sdcs has said.

http://www.tutorial9.net/tutorials/p...s/crop-factor/
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Old Apr 17, 2011, 3:28 PM   #17
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I have read that and other, some of them goes both ways. But it is still a 14mm lenses and it is easy to avoid camera shake. That is all. I have shot 28mm lens that is non IS down at 1/16 sec, and it is eq to 44.5. And have had the same camera shake results when I put that lens on Film. The shake is uniform through out the pixels.
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