Lens Question

[jay mcdaniel]

Quick question:

I’m looking into buying a lens for my Canon Xsi. I’m looking at a Sigma Diagonal Fisheye that is made for digital cameras with a full frame sensor. What happens if I attach this to my Canon that has an APS C size sensor? Thanks.

J

[anonymous]

If its gives a 15mm field of view on a FF simply multiply the crop factor of your cam – 1.5/1.6 whatever …

so on a 1.5 crop factor cam it will give the equivalent of a

[jay mcdaniel]

Okay that makes sense. Thanks so much, Will.

[mark s]

Jay, just curious, what’s your end game with that lens?

[David Anderson]

I’m not familiar with the Sigma, but a full frame fisheye has massive distortion which is part of their look and on some stuff I’ve seen it’s really cool.
The same lens cropped though, might just look like a crappy super wide with bent corners.

Just guessing a bit, because I don’t have a fisheye.

I do think it’s something you should try before buying.. 😉

www.dsaphoto.com

A picture is thousand words that takes less than a second while a thousand words is a picture that takes a month.

[jay mcdaniel]

Yeah, thats what has been running through my head. One, I’m not excited about my shots being cropped–especially if they are fisheye. And two, wondering if I will

[John Bennett]

Jay I think theres a Sigma 10-22 or 12-24 type lens that gets good reviews.

Re “crop factors”
Brutal term that misleads so many people. This may be unneccessary, but whats really happening is your field of view is reduced.Thats it.
http://www.kenrockwell.com/tech/crop-factor.htm

That said if your looking for a nice landscape lens in the 400-500 range used I’d look really hard at the Canon 17-40 L.

Take what ever it is your using now and then take two shots for comparative purposes. First shot at is widest setting (say 18mm) and then a second shot just 5mm “narrower” (23mm).

That wee difference is worth spending the extra coin on a 12-xx to 10-22?

The one area it may be worth it is if you do alot of “grip/grin” shots from within boats. Otherwise if landscapes are your thing Id get the best glass I could and in your budget the 17-40 L is right up your alley.
In Canada new it retails for about 800. So in the US its got to be a fair bit cheaper new and Ive seen them offered used around your budget
http://www.fredmiranda.com/forum/topic/846334

Sigman 12-24
http://www.fredmiranda.com/forum/topic/844150

Just me but for the same $$ Id opt for the 17-40 L

[Steve K.]

Jay,

I’m pleased with my Tokina 12-24 purchased off Craigslist in nearly new condition for $400.

http://www.dpreview.com/lensreviews/tokina_12-24_4_n15/

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