kriptap 0 Posted August 31, 2007 On a flat calm today I took this image, is there a way to capture a complete circle, no matter what I did I could not get the image to show a complete circle, would a larger dome have done it or is there no way. Oh and as I said I try all kinds from, closer to further away, tilting left and right and back and forth etc but... Thx Share this post Link to post Share on other sites
Craig Ruaux 0 Posted August 31, 2007 Was this shot with a cropped sensor camera? The circular fisheyes make a circle on a full size (35mm) frame, but are cut off by APS-C sized sensors. See for instance this comparison of the 8mm Peleng lens on a 5d and an EOS 350Dl. Share this post Link to post Share on other sites
segal3 0 Posted August 31, 2007 You'd have to use a circular fisheye on a full-frame camera - Sigma makes an 8mm version. From what I recall, the Peleng is manual aperture control only? Share this post Link to post Share on other sites
kriptap 0 Posted August 31, 2007 (edited) Okay I see, yes it was a cropped, D2X, oh well, thanks guys. Edited August 31, 2007 by kriptap Share this post Link to post Share on other sites
Rocha 0 Posted September 1, 2007 It shouldn't matter if it is a cropped sensor or not. The field of view of the 10.5 fisheye is the same as the 16mm fisheye on full frame. Did you use the 10.5? P.S.: Oh, ok, it does matter if you have to use a circular fisheye. There are no circular fisheyes for cropped cameras... Share this post Link to post Share on other sites
Tom_Kline 127 Posted September 1, 2007 Nice shot of a Snell's window! For an explanation check out: http://www.daveread.com/uw-photo/comp101/snells_window.html Tom Share this post Link to post Share on other sites
Craig Ruaux 0 Posted September 1, 2007 If my understanding of Kriptap's post is correct, this is actually a nice illustration of what Snell's window would maybe look like, but the effect in Kriptap's shot is due to the circular nature of the image produced by a classical 180 degree round fisheye. Share this post Link to post Share on other sites
Giles 1 Posted September 1, 2007 The thing that bothers me .. without understanding too much of the science is that the cirle is not symetrical .. the left side of the circle is more full than the right side .. is that caused by tilting .. and percentage wise you only get the same amount of circle total ? Share this post Link to post Share on other sites
