Looking For A Lens

[NateWagner]

yeah, of course one of the things about the 17-40 is that the 17 isn't really all that wide anymore. I mean, it's relatively wide, but on a xti with the crop it makes it more like a 26ish to 68mm lens.

thus, if you're really going for the wide angle then the 10-20 may serve you better. Also, if you have the kit lens which is the 18-55mm then getting the 17-40 basically just replaces the range you already have (though with a better lens obviously) the 10-20 adds a much wider angle of view than what you have currently.

 

[chantal7]

yeah, of course one of the things about the 17-40 is that the 17 isn't really all that wide anymore. I mean, it's relatively wide, but on a xti with the crop it makes it more like a 26ish to 68mm lens.

thus, if you're really going for the wide angle then the 10-20 may serve you better. Also, if you have the kit lens which is the 18-55mm then getting the 17-40 basically just replaces the range you already have (though with a better lens obviously) the 10-20 adds a much wider angle of view than what you have currently.

Hmm - thanks for that So far, once again, the 10-20 sounds like a better deal of it all.

One question though... how is 17 less wide than 10? Cause the way I see it, 17 would be more wide? I am looking at the numbers rather than what they could actually mean.

 

[Hobbes]

hmm I wonder if there is a comparison on exactly how much wider 10mm is vs 17. I know my lens, 17-85 is usm, is hell of a lot wider at 17mm than your 18-55 kit lens. heh I am don't know if the much wider front part has anything to do with it...

 

[Steph]

hmm I wonder if there is a comparison on exactly how much wider 10mm is vs 17

The shorter the focal length, the wider the lens and the wider the field of view (FOV)

18mm - FOV=73 degrees
17mm - FOV=76 degrees
10mm - FOV=106 degrees

Those are diagonal fields of views calculated for a Canon APS-c sensor.

 

[Hobbes]

The shorter the focal length, the wider the lens and the wider the field of view (FOV)

18mm - FOV=73 degrees
17mm - FOV=76 degrees
10mm - FOV=106 degrees

Those are diagonal fields of views calculated for a Canon APS-c sensor.

ah thanks. well at around 30% wider the 10-22 lens clearly wins here but how about image quality compared to the 17-40 L lens? from what I have read and heard none of sigma or tamron lenses come even close to the L lenses made by Canon when it comes to build and image quality.

EDIT: a guy on another forum suggested Tokina 11-16 f/2.8 lens and claiming it being both sharper and better built than canon's 10-22. does any of you know anything about that lens? well at 600 dollars and f/2.8 Tokina does look very enticing.

btw lol i hope the thread starter doesnt mind me hijacking her topic I am looking for an ultra wide as well

EDIT #2:
found some more info about the Tokina lens

http://photo.net/equipment/tokina/11-16/

http://www.thecamerastore.com/products/catalog/wide-angle-lenses/tokina-atx-11-16-f28-canon-mount

 

[chantal7]

@ Hobbes - Where were you when Overread posted the link about it? lol it has the comparison in there. Sigma 1.4x TC vs Canon 1.4x TC

http://www.juzaphoto.com/eng/articles/lens_reviews.htm

And uh, I'd prefer if you made your own topic, since we are looking at buying totally different brand names, no offense. I've never even heard of Tokina before.

 

[Hobbes]

I was just wondering about the difference in image quality between Canon 17-40 L (not canon 10-22) and sigma 10-20. but never mind about that since you probably want 10mm. Well I didn't mean to hijack your topic , just curious about the lenses since I dont think I will be able to buy anything until next year. about the Tokina lens, read the last 4 posts in this topic if you want...

http://forums.d2jsp.org/index.php?showtopic=24752489&f=265&st=10

if im not mistaken Tokina is just like Tamron and Sigma, they make third party lenses for the "big boys" but I'll just let the pros on here tell you To me brand names are just names as long as they make good lenses I would care less if its called Tokina or Donald Duck