tokina 10-17mm f/3.5-4.5 fisheye or sigma 10mm f/2.8 on canon 40D

lawrence

pls help me decide, give me your opinion,experience!
and can anyone tell me if the tokina on 1.6 crop be 180 degree?


thanks every body!!!!~~~~

Ultraman

Well, Tokina 10-17 is a zoom while Sigma 10 is a prime. Hard and unfair to compare them wor.
But just talking about the 10mm position, Sigma is f2.8 but Tokina is f3.5; of course f2.8 might be a benefit for you la.
But then, a zoom is more convenience than just a fix lens (prime)! Depends on what's your purpose for using it lor.

Crop factor doesn't affect the perspective of a view angle, but just like chopping the side off! So technically the view angle of the lens is still 180 degree but it's like a zoomed image from a lens that has a view angle of 288 degree but having a 180 degree perspective. Get it?

lawrence

because the sigma on canon is 167 and on nikon 1.5 crop is 180 so i wonder if the tokina would be the same
I think i will take landscape and architect on this lens and also play with frds at restaurants for portraits in low lights that's why i consider the sigma. and I have use prime lens before and i really think the images is better but when i look at reviews every body seems to like the tokina more.  and i already have a 16-35 so I dun think i will use the 17 on the tokina

so hard to decide........

thanks guys for the replys!!!~~~

lerico

have you considered canon's 10-22? I have one and it's excellent.

I personally would not consider the fast prime. base on my experience, 10mm is mostly useful for landscape and other subject where motion blur doesn't really matter. Whenever I use 10mm, i usually close it down to f8 and put it on tripod.

Maybe it's just me not having too much experience, I usually use it from 14mm on, 10mm is just too difficult to frame. And on our 95% viewfinder, that 5% we don't see in the viewfinder for a 10mm lens can include a lot of things, like my feet, shadow... etc :-)

[ 本帖最後由 lerico 於 2008-2-12 09:43 編輯 ]

lawrence

I wanna get the sigma and the tokina is because i want a fisheye, and the canon 14mm and 15mm fisheye doesn't give the effect for 1.6 crop as much as the full frame

but thanks for the idea!!~~~

lerico

I got it... you want fisheye! ... sorry i have missed that in your original post.

Good luck with your research then~~~!

Ultraman

You already have some concrete idea in mind. Such as you need fisheye, low light capability..., then go for the Sigma la! But if you have the 16-35, I won't use the fisheye for "portraits" lor. Only if you wanna try out some creatively funny newer style of portraits but not those more traditional ones!