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eku !8cibvLQ11s
Which lens do I want?
I've been thinking of buying (super)wide lens for my 30D.
The problem is, I don't know which one.
The lenses I've been thinking of getting are Canon EF-S 10-20mm, and Sigma's 12-24mm.
Former would be wider, but latter would work with full frame*. And I've also heard mainly good things about it.

And how wide is 10mm? Compared to 12mm, and to 17mm (which is my widest). (Photos, please?)
I want wiiiiide. Help me decide.

* To which I hopefully upgrade in some unknown future (but I think the money wouldn't be problem then, and I would get rid off the EF-S lens and buy some much better prime)?
EXIF data available. Clickhereto show/hide.
Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS 30DCamera SoftwareAdobe Photoshop CS3 WindowsPhotographerLauri KosonenMaximum Lens Aperturef/1.8Image-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution240 dpiVertical Resolution240 dpiImage Created2007:11:11 21:59:53Exposure Time1/45 secF-Numberf/2.8Exposure ProgramAperture PriorityISO Speed Rating1600Lens Aperturef/2.8Exposure Bias0 EVMetering ModePatternFlashNo Flash, CompulsoryFocal Length50.00 mmColor Space InformationsRGBImage Width427Image Height640RenderingNormalExposure ModeAutoWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
Take a look at the Tokina 12-24mm f/4. It's got Canon L-series quality construction as well as a constant aperture.

And I wouldn't worry about upgrading to FF. If you do that you're probably going to want a 16-35ish lens to replace the one you're buying now because that would be the equivalent FoV focal length.
>> Anonymous
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Here's an useful "how wide is that" chart.
It's for Olympus, for Canon you have to multiply all focal lengths by 1.25 (so 7mm becomes 9mm, 12mm becomes 15mm, etc.)
>> Anonymous
Here's another thing that might help.
http://www.tamroneurope.com/flc.htm

It only goes down to 11mm but it still gives you a good idea of the differences between focal lengths and how the difference between, say, 12 and 14mm is much more apparent than the difference between 120 and 140mm.
>> Anonymous
>>90276
That demo isn't terribly accurate on the wide end (an 11mm rectilinear lens for a film camera, if it existed, would've given a MUCH more distorted picture)
>> eku !8cibvLQ11s
>>90269
But with FF, Sigma would be wider. 12mm beats 16mm.

>>90276
>>90272

Nice. Thanks.
>> Anonymous
>>90279
Of course, but 12mm on FF is a bit ridiculous. I have trouble getting a good composition with a 16mm lens. I would have no use for 12mm and I believe most other people wouldn't either. So what I'm saying is that once you're used to the FoV you get with 10 or 12mm on a crop camera you'll be perfectly happy with a 16mm lens on FF.
>> Anonymous
>>90279
I heard Sigma 12-24 has rather horrible vignetting and soft corners when used on FF. (There's no alternative on film, but with digital you can de-fisheye shots from a fisheye lens and probably achieve better results - if you need that crazy wide-angle anyway)
>> Anonymous
Fish eye and the more extreme ultra wides are of greatly limited use. As said already, it can be hard to get a nice composition with it and even then it's not often on the camera for the majority. Very fun to use sometimes, but not a workhorse. Something to consider only if you've got a full kit that keeps you happy and money that you won't miss or a burning passion for ultra wide angles.

16 or 17 is about as wide as you'd normally care for on a FF camera. The 10-20mm works out about 16 on the crop body, so you're not going to feel you are hurting for more room on the wide end with that one. If you went full frame the 16-35 would be the lens of choice, so go for what suits you now. The 10-20 is good and worth the money.
>> Anonymous
Why not get the Sigma 10-20mm?
>> Anonymous
dont waste money now on a lens that wont wotk with the full frame DSLR you'll have in two years
>> Anonymous
>>90329
?? If he buys Canon, he can always resell it.

It's not like crop cameras are going to die anytime soon. Hell, I like the 1.6x crop factor for that extra zoom on my telephoto lenses!
>> Anonymous
True. The used lens market is always alive. You can usually get 75-100% of what you paid for it when selling used.
>> Anonymous
>>90331
its not extra zoom, dipshit, you're just using less of the focal plane
>> Anonymous
>>90342

You are a liar and a pederast.