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25-06-2010, 3:11pm
Nikon has a 16mm fisheye

Canon has a 15mm fisheye

What's the difference between the two different focal lengths? Don't all fisheyes have a viewing angle of 180°?
kiwi
25-06-2010, 3:13pm
1mm

I dont believe all have 180 degree at all
Tannin
25-06-2010, 4:22pm
Don't all fisheyes have a viewing angle of 180°?

No. Never have had. Hell, my beautiful little Tokina 10-17 fish (http://www.ausphotography.net.au/forum/showthread.php?t=10256) is a zoom!
Watchamacallit
25-06-2010, 6:28pm
Isn't the tokina 10-17mm the only zoom fisheye? How does it compare to the other "primes" (aka, say a Canon 15mm?)

I'm also kind of curious why the comparison between two different brand lens fisheyes?
bigdazzler
25-06-2010, 6:32pm
Nikon has a 16mm

Canon has a 15mm

What's the difference between the two different focal lengths?


1mm




I knew youd do it .. :lol:
Tricky
29-06-2010, 4:07am
Isn't the tokina 10-17mm the only zoom fisheye? How does it compare to the other "primes" (aka, say a Canon 15mm?)

I'm also kind of curious why the comparison between two different brand lens fisheyes?

On a cropped sensor, the 15mm and 16mm primes would hardly be "fishy" at all, ie these prime fisheyes would only really give the intended effect on a full frame sensor. The Tokina 10-17 is intended for a cropped sensor and gives a "full-frame equivalent" of 16mm. At the 10mm end it is very fishy; at 17mm, it is almost rectilinear.
Watchamacallit
29-06-2010, 9:09am
On a cropped sensor, the 15mm and 16mm primes would hardly be "fishy" at all, ie these prime fisheyes would only really give the intended effect on a full frame sensor. The Tokina 10-17 is intended for a cropped sensor and gives a "full-frame equivalent" of 16mm. At the 10mm end it is very fishy; at 17mm, it is almost rectilinear.

I had a squiz through Tannin's thread on the 10-17mm and noticed what you mentioned. Haven't really looked at fisheyes myself (no current need for the effect) but something I'll keep in mind for the future.
soulman
29-06-2010, 1:11pm
There is a good article on fisheye lenses on Wikipedia (http://en.wikipedia.org/wiki/Fisheye_lens). It explains that early fisheyes were circular and all 180˚.