Opticallimits

[quote name='popo' date='14 July 2010 - 01:44 PM' timestamp='1279107878' post='999']

To be more specific on that, only Canon EF-S lenses can't be normally used on their full frame bodies, as they do protrude a little into the mirror area. However the 3rd party APS-C lenses I've tried don't have that protrusion, so can work if you don't mind the smaller image circle.

[/quote]

Yes, true. However, the image circle does get wider the more you zoom out, see my previous post <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt=':o' />.



Kind regards, Wim

[quote name='wim' date='15 July 2010 - 02:22 AM' timestamp='1279153366' post='1011']

It also means that you can get frame filling images on a FF camera, with such a lens, provided you are either close enough, or with a zoom lens if you zoom in by some, generally a factor of about 1.3 to 1.5, i.e., zoom, e.g., a 10 - 20 mm lens to somewhere between 13 and 15 mm to determine where the point is where the VF is completely filled by the image.

[/quote]



This is the case for some lenses ... but not for all.



The Tamron 17-50 for instance does never fill the image of a FF camera. (Regardless which focal length you use and which aperture).

Hi Rainer,

[quote name='Rainer' date='15 July 2010 - 12:22 PM' timestamp='1279189374' post='1021']

This is the case for some lenses ... but not for all.



The Tamron 17-50 for instance does never fill the image of a FF camera. (Regardless which focal length you use and which aperture).

[/quote]

Yes, you're right. Many lenses do however, especially the (U)WA zooms. I guess it is a matter of trial and error <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />.



Kind regards, Wim