question crop factor plus tele converter
Jan 30, 2012 13:09:23 #
I am shooting a canon t3i with 1.6 crop factor. using a 300mm = 480mm. if i use a 1.4 teleconverter does this give me another 192mm which would equal =672mm ????
Jan 30, 2012 14:00:08 #
ronjay wrote:
I am shooting a canon t3i with 1.6 crop factor. using a 300mm = 480mm. if i use a 1.4 teleconverter does this give me another 192mm which would equal =672mm ????
Yes
Jan 30, 2012 15:24:34 #
Wabbit
Loc: Arizona Desert
ronjay wrote:
I am shooting a canon t3i with 1.6 crop factor. using a 300mm = 480mm. if i use a 1.4 teleconverter does this give me another 192mm which would equal =672mm ????
Yes, but remember that it's going to affect your aperture.
Jan 30, 2012 18:13:48 #
Jan 31, 2012 05:54:30 #
ebaribeault wrote:
Yes
ronjay wrote:
I am shooting a canon t3i with 1.6 crop factor. using a 300mm = 480mm. if i use a 1.4 teleconverter does this give me another 192mm which would equal =672mm ????
Yes
agree, and depending on the speed of your lens and available light, you may need to manual focus.
Jan 31, 2012 11:09:14 #
"Crop factor" affects only field of view NOT magnification, as far as I understand.
Your 300mm lens still magnifies the same whether it is attached to an FX or DX style camera, thus a 1.4x teleconverter only will "magnify" the equivalent of 420mm, but yield an equivalent 672mm field of view.
Your 300mm lens still magnifies the same whether it is attached to an FX or DX style camera, thus a 1.4x teleconverter only will "magnify" the equivalent of 420mm, but yield an equivalent 672mm field of view.
Jan 31, 2012 11:43:05 #
Wabbit
Loc: Arizona Desert
rgstoneinsc wrote:
"Crop factor" affects only field of view NOT magnification, as far as I understand.
Your 300mm lens still magnifies the same whether it is attached to an FX or DX style camera, thus a 1.4x teleconverter only will "magnify" the equivalent of 420mm, but yield an equivalent 672mm field of view.
Your 300mm lens still magnifies the same whether it is attached to an FX or DX style camera, thus a 1.4x teleconverter only will "magnify" the equivalent of 420mm, but yield an equivalent 672mm field of view.
Crop is a fairly good term the imaging area is physically smaller. Less of the image circle projected by the lens is used, therefore it is a crop. The image remains the same size at the film plane for a given lens and subject distance it is in no way magnified. It does, however, take up a larger proportion of the (smaller) frame and so it is easy to see why some people call it a magnifying effect.
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