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Photo Forum / Digital Photography / DSLR Cameras / April 20061:1 reproduction ratio?
What does it mean when the description of a macro lens says, "reproduction ratios of up to 1:1"? Clearly, I can display or print the image at any size I want, and get any magnification ratio at all. > What does it mean when the description of a macro lens says, "reproduction > ratios of up to 1:1"? Clearly, I can display or print the image at any > size I want, and get any magnification ratio at all. It means that the image projected on the sensor by the lens is of the same dimensions as the subject.  Signature--John to email, dial "usenet" and validate (was jclarke at eye bee em dot net) 1:1 means the subject is life size on the sensor, clearly this is a problem with an elephant, but not with a bee. This enhances details at the expense of depth of field. It is always a balancing act. So the mag on the lens only refers to what is going on the sensor, it is not concerned with what you do after to view. Viewing is of course much more flexible than the days of film when you looked at slides or negatives. Knowing the sensor magnification still has its uses. Tom > 1:1 means the subject is life size on the sensor, clearly this is a > problem with an elephant, but not with a bee. This enhances details at [quoted text clipped - 5 lines] > > Tom I think that what Tom meant was that you'd only get a small portion of the elephant on the sensor. That part would be at life size (and that's why you'd get only a small part). FWIW - beware of using a macro lens. Once you get used to using it, you'll be hooked and enjoying a great, fun filled aspect of photography. Regards, Ian. > What does it mean when the description of a macro lens says, "reproduction > ratios of up to 1:1"? Clearly, I can display or print the image at any > size I want, and get any magnification ratio at all. It's referring to the size *on film* (or digital sensor). SignatureDavid Dyer-Bennet, <mailto:dd-b@dd-b.net>, <http://www.dd-b.net/dd-b/> RKBA: <http://www.dd-b.net/carry/> Pics: <http://dd-b.lighthunters.net/> <http://www.dd-b.net/dd-b/SnapshotAlbum/> Dragaera/Steven Brust: <http://dragaera.info/> Saw some great slides tonight of insects. every individual hair on a fly. As well as bees, stamen of a flower, >> What does it mean when the description of a macro lens says, >> "reproduction >> ratios of up to 1:1"? Clearly, I can display or print the image at any >> size I want, and get any magnification ratio at all. > > It's referring to the size *on film* (or digital sensor). |
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