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PostPosted: Fri Dec 14, 2007 8:51 pm 
Hey guys...

i still am looking for a new lens for my canon rebel xti, i will be buying 1 in 2 days, money is not a problem..

im lookiing for a lens that i could use for a everyday lens, i photograph cars at car shows, events, photoshoots, and randomly for fun, most of this is outside.

i was looking at the Sigma 18-200 3.5-6.3 OS lens and the Canon 28-135 3.5-5.6 IS lens, which on off these will be better for a everyday use lens?

i really really want the sigma but people say its slow inside and its not fast.

I know this sounds stupid but i never really knew this but, what does 3.5-6.2 or 4.5-5.6 or w/e stand for? shutter speed? focuing speed?

which one of these should i get? and which on focuses faster and its just better overall, price doesn't matter...

there have been rumours for a canon 17-200 3.5-5.6 lens for late January if thats true ill get that for sure...

thanks.


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PostPosted: Fri Dec 14, 2007 9:17 pm 
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Hi 1exotic - those numbers are the focal ratio, commonly known as the aperture. The smaller the number, the more light it can gather - handy for achieving fast shutter speeds or working in low light without having to increase your sensitivity too much.

I'd once again refer you to my general purpose lens group test though here:

http://www.cameralabs.com/features/Cano ... s_upgrade/

I personally think the Canon EF-S 17-85mm is the best all-round general purpose lens for the XTi / 400D, unless you have specialist tastes or don't mind missing out on wide angle.

Gordon


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PostPosted: Fri Dec 14, 2007 11:54 pm 
yes i have been told 17-85 is the best lens out there for this camera...

ill maybe get it.


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PostPosted: Sat Dec 15, 2007 12:15 am 
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I have the Canon EF-S 17-85mm on my XTi and I love it.

Great image quality, sharp and fast focus.

Mitch

_________________
Panasonic Lumix DMC-ZS3 (Lumix DMC-TZ7)


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PostPosted: Sat Dec 15, 2007 5:05 am 
Definitely agree with you that the Canon EF-S 17-85mm is a walkaround general purpose lens. It's definitely underrated and heavily bashed amongst the photography community. Definitely a good fit for the 400D/Xti.

Gordon: thanks for the unbiased review on this lens.

Andrew


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PostPosted: Sat Dec 15, 2007 9:23 pm 
Im not really sure about the 17-85, im not sure about the quality tho, ill go check it out in person and same as the 18-200 sigma lens.


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 Post subject: Sold out...
PostPosted: Sat Dec 15, 2007 10:35 pm 
I was at 4 stores where they sell camera's today and they are ALL sold out off sigma 18-200 OS lenses, i will buy a lens tomorrow or today for sure because monday will be to late for me.

can you guys please respond with as much info in your own words, because i cant find the answers anywhere else on the internet.

i sometime photograph lets say moving cars going past me um lets say 70km and if i point at it and focus and shoot will this lens be good of doing this ever at 150 zoom or more or less?

i also have a 70-200 lens, but thats not my daily lens, 18-200 will be, like if there is a bird flying past me in the air will this lens be fast enofe to take a picture?

and some people say this lens is slow, what do they meen by that? slow af or maybe its even not..


let me know asap, thanks guys.


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PostPosted: Sun Dec 16, 2007 1:33 am 
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If you want fast focusing, make sure you buy a Canon lens with USM or a Sigma lens with HSM. Otherwise they can be quite slow.


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PostPosted: Sun Dec 16, 2007 2:22 am 
[quote="Gordon Laing"]If you want fast focusing, make sure you buy a Canon lens with USM or a Sigma lens with HSM. Otherwise they can be quite slow.[/quote]

how about this lens

Sigma 18-200mm f3.5-6.2 DC OS HSM lens


let me know thank you.


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PostPosted: Sun Dec 16, 2007 3:54 am 
alot of people say if i zoom at like 200 or w/e and im at f/6.3 it will be SLOW... what do they meen by slow? my shutter speed will change?


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PostPosted: Sun Dec 16, 2007 8:15 am 
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I've not tested the OS version, so can't comment. I may have also got this wrong, BUT I think the 18-200mm OS is only available with HSM for the Nikon mount, so it's compatible with the D40 and D40x. I have a funny feeling the Canon version is not HSM, but I stand ready to be corrected!

What you think of the lens focusing speed can also be quite a personal thing, so where possible I'd really recommend trying it for yourself on a moving subject.


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PostPosted: Sun Dec 16, 2007 8:31 am 
eh i bought the 17-85IS lens from ebay and i also bought a extra lens hood and a polarizing filter for this lens, thanks for your help.

but when if the 17-200 DOES come out from canon ill get that fror sure.


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PostPosted: Sun Dec 16, 2007 8:39 pm 
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Good one - I think you've got a great lens, but do tell us what you think...


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PostPosted: Sun Dec 16, 2007 9:20 pm 
Maybe I'm missing something, but why is the EF-S 17-85mm raved so much more about the best upgrade for an Xti compared to the EF 28-135mm IS USM?

To me, it seems like the 28-135mm would be a much greater upgrade due to the larger focal ratio as well as a much better range. Also, the EF will be able to use on a full frame sensor, while the EF-S will not. At nearly the same price, it seems to me like there's no question the 28-135mm would be a better bet. Or is there something I am missing?

Is the only reason that this one is spoken so much more about because it has a slightly wider angle? Or, does it just fit better with the Xti body?

In summation, thumbs up or thumbs down on replacing my 18-55mm kit lens with the 28-135mm over the 17-85mm??

Daniel


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PostPosted: Mon Dec 17, 2007 3:23 am 
SoccerandDMB wrote:
Also, the EF will be able to use on a full frame sensor, while the EF-S will not.

Daniel


Is the EF lens better then the EF-S :?: Or does that just refer to sensor size?

Nick


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