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| DT 18-250 and Minolta 100-200mm | |
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| Tweet Topic Started: Mar 16 2011, 09:28 PM (2,080 Views) | |
| robinc2005 | Mar 18 2011, 09:37 AM Post #11 |
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Poisoned Alpha member
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Sorry bros, correct me if i'm wrong. Is it the same theory as: 1. DT Lens on crop body @ 250mm = 250mm 2. Minolta Lens on crop body @ 200mm = 300mm (With 1.5 Crop Fact) ??Correct? |
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| blaz7 | Mar 18 2011, 09:40 AM Post #12 |
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Alpha Happy Member
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All should be multipled by the crop factor.
Edited by blaz7, Mar 18 2011, 09:44 AM.
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| robinc2005 | Mar 18 2011, 11:17 AM Post #13 |
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Poisoned Alpha member
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You mean even with DT lenses on crop body should be multiplied by crop factors as well? if that is 250mm on crop body should be 375mm instead? |
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| blaz7 | Mar 18 2011, 11:24 AM Post #14 |
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Alpha Happy Member
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Yes, it should be 27mm to 375mm |
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| robinc2005 | Mar 18 2011, 04:00 PM Post #15 |
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Poisoned Alpha member
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But how come DT18-250 more far when we look at the photo?? Still don't understand. Sorry for noob questions... |
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| blaz7 | Mar 18 2011, 04:04 PM Post #16 |
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Alpha Happy Member
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From what the articles explained, it was something to do with what they call focus breathing, but when i tried it at focus to infinity, 250mm was indeed longer than 200mm. You can trying reading the articles posted by cjng. Look under the handling part. Breathing |
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| ghostfit | Aug 4 2011, 03:45 PM Post #17 |
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Alpha Happy Member
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Yes, that 250mm is the focal length regardless on FF or cropped body ...but on a cropped body it will give a 'field of view' equivalent to 375mm on a 35mm format (FF body) I was stumped by all this too when I went digital. |
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3:03 AM Jul 12