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pcasciola
27th of December 2004 (Mon), 15:57
Instead of trying to explain this question, I've taken Belmondo's excellent visual aid and added what I think most new APS-C type lenses will be, meaning Canon EF-S, Tamron Xr Di-II and Sigma DC lenses. Maybe not exactly this, but something in between my example and a 35mm lens?

If this is the case, using these lenses on a full frame camera would certainly create a new term called, the "vignette factor". I don't believe the Sigma's use an EF-S mount, so you could theoretically put them on a 1 series camera (Good news for the 10D owners).:)

Just curious....

[EDIT: I updated the image to try and make it more clear]

http://www.casciola.com/pics/efs2.gif
cmM
27th of December 2004 (Mon), 16:52
so what's your question? :p
pcasciola
27th of December 2004 (Mon), 16:59
so what's your question? :p Oh, sorry, I thought that was obvoius. The question is, does a Canon EF-S, Sigma DC or Tamron DI-II project an image circle that is smaller than a typical 35mm lens?
cmM
27th of December 2004 (Mon), 17:48
yes it does.
ron chappel
27th of December 2004 (Mon), 18:32
The EF-s lens is like that at it's wide end but gradually covers more as it zooms to the long end.It covers a full frame by about 23mm with some vignetting
<P>I'm not sure about the other brands
http://www.photo.net/photodb/photo?photo_id=2988836&size=lg
ron chappel
27th of December 2004 (Mon), 18:33
Ohf'f*ckssake is it really that hard to post an image on this forum??
I can never get the stupid thing to work!

http://www.photo.net/photodb/photo?photo_id=2988836&size=lg
cmM
27th of December 2004 (Mon), 18:38
Ohf'f*ckssake is it really that hard to post an image on this forum??
I can never get the stupid thing to work!

http://www.photo.net/photodb/photo?photo_id=2988836&size=lgHere you go Ron
http://gallery.photo.net/photo/2988836-lg.jpg
pcasciola
27th of December 2004 (Mon), 18:50
Ron,

So you are saying the image I drew is pretty close to what the 18-55mm is like at 18mm, but it gets closer to full frame at the 55mm end?

Do you remember the zoom of the picture you posted, or, umm, I mean the picture of yours that cmM posted? :D
PacAce
27th of December 2004 (Mon), 19:02
Ohf'f*ckssake is it really that hard to post an image on this forum??
I can never get the stupid thing to work!

http://www.photo.net/photodb/photo?photo_id=2988836&size=lg

So what camera was this shot taken with?