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DPChallenge Forums >> Photography Discussion >> Canon EF 70-200 f2.8 USM IS how good is it ?
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Showing posts 51 - 60 of 60, (reverse)
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 02/27/2006 05:14:37 PM · #51
Originally posted by jpochard:
Also, my question would be how does the Canon compare to what appears to me to be very similar Sigma 70-200 f/2.8EX? I don't see an option in that range with image stablization, but what is the difference other than that?


Just wondering if anyone had any input on my question from earlier. The price difference is significant.
 02/27/2006 05:16:54 PM · #52
The sigma lenses don't have the low dispersion optics... they have cheaper glass inside the lens.
 02/27/2006 05:20:21 PM · #53
Originally posted by jpochard:
Originally posted by jpochard:
Also, my question would be how does the Canon compare to what appears to me to be very similar Sigma 70-200 f/2.8EX? I don't see an option in that range with image stablization, but what is the difference other than that?


Just wondering if anyone had any input on my question from earlier. The price difference is significant.


Actually, the Sigma 70-200/2.8 EX is said to be very good indeed. I have no direct experience with it, but from images I've seen posted it is not quite the optical equal of the Canon wide open, but not that far off.
The thing with Sigma is that their lenses seem to sometimes require rechipping for new Canon bodies, and at some point they stop supporting the rechipping for the older lenses.
02/27/2006 05:35:04 PM · #54
Originally posted by kirbic:
Originally posted by jsolsona:
Originally posted by dleach:
so heres a question, if you use the 1.4 converter what does it do to the f2.8?


Yes exactly.. and what about quality? does quality drop a lot with a 1.4 or 2 converter?

Javier


With the 1.4x Canon converter, the quality is supposedly very good; I don't have this converter, so I can't directly comment. You lose 1 stop with a 1.4x converter, so the 70-200 f/2.8 becomes a 98-280 f/4...


I do have the Canon 1.4x II and use it extensively in combination with the Canon 70-200 f2.8 L. The quality is absolutely stellar at all lengths. For those with an interest, almost all my wildlife (Fauna & Great Blue Heron categories) shots have been taken with this combination).
 02/27/2006 05:51:48 PM · #55
Originally posted by kirbic:
Originally posted by wee_ag:
Is that ISO 1250 or 250 (typo?)? And what would have happened if you had used the f/4 version?


I'm sure he did mean ISO 1250. Using the f/4 version would have put him beyond ISO 1600 for that shutter speed, thus he would have been faced with using ISO 3200 (undesirable) or not getting the shot, assuming that he was using the slowest practical shutter speed.


Great - thanks for the response.
 02/27/2006 06:02:46 PM · #56
Looks like I have opened a right can of worms here with my original question EF 70-200 f2.8 USM IS How Good is it !
I was away at a judo competition in St Helens England last weekend
and there was a professional photographer present taking sports shots of the event, he was most helpful with his comments and said he could not achieve shots like he was getting with any other lense he poseses.
the quality of the shots were First Class.
The Good news is I will be placing my order next MONDAY
Yipeeeeee never been this excited about anything else in years.
Joe
 02/27/2006 10:59:19 PM · #57
Originally posted by jmsetzler:
The sigma lenses don't have the low dispersion optics... they have cheaper glass inside the lens.


From the Sigma website regarding this lens:

"SLD glass for excellent image quality

Color aberration in the secondary spectrum is compensated by using two pieces of SLD (the special low dispersion) glass in the front lens group and another two in the rear group. This lens has excellent exhibits superior image quality."

I'm still very new at learning all the terms for lenses and what they mean, but it sounds the same? I can't afford top of the line but don't want to waste money on lowest price garbage either. I need some value someplace in between.
 02/28/2006 12:06:49 AM · #58
You're correct, it does look like Sigma uses Low-dispersion elements in this design. I have not heard anyone "dis" the Sigma 70-200/2.8 EX; it seems a great value for the $$$. I'd suggest stopping in at a camera store that carries both the Canon 70-200/2.8 and the Sigma, and shoot some portrait shots of the sales person wide open with both, with your body on your memory card. Then take 'em home and compare.
 02/28/2006 08:31:52 AM · #59
Originally posted by kirbic:
You're correct, it does look like Sigma uses Low-dispersion elements in this design. I have not heard anyone "dis" the Sigma 70-200/2.8 EX; it seems a great value for the $$$. I'd suggest stopping in at a camera store that carries both the Canon 70-200/2.8 and the Sigma, and shoot some portrait shots of the sales person wide open with both, with your body on your memory card. Then take 'em home and compare.


Good idea. Not too much around here in the way of good camera stores. I'll have to go more into Cincinnati and see what I can find. I really haven't had a need for such things before now. :)
 02/28/2006 08:49:08 AM · #60
I'm just heading off to post another thread in the Hardware section regarding the Kenko VS Canon Tele-converters.

I will be asking about the 1.4x, 2.0x and 3.0x

Have a look if you find it relevant.
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