Semi-Newbie: 70-200L vs 70-300IS ??? -- Canon Lenses in photography-on-the.net forums

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Location: NW Burbs, IL

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Apr 05, 2006 13:55 | #1

Like many people, I am considering either the EF 70-200mm f/4L or the EF 70-300mm f/4-5.6 IS. Even more so since you can get either one for about $500 at Amazon after rebate. Since I'm only a semi-newbie I think I know that the 70-200mm has a constant aperature of f/4 and the 70-300mm has a maximum aperature of f/4 at 70mm and f/5.6 at 300mm.

My question is what is the maximum aperature of the 70-300mm at a focal length of 200mm? How would I find that out before I buy one (without asking you guys/gals)? Do I need to know that to properly compare the speed of these two lenses since you shouldn't really compare one at 200mm and one at 300mm anyway?

Thanks in advance.

"You only get one sunrise and one sunset a day and you only get so many days on the planet. A good photographer does the math and doesn't waste either." - Galen Rowell

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stupot

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Location: UK, Portsmouth Uni / HW Bucks

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Apr 05, 2006 13:58 | #2

i cant answer your question as i dont own that lens... but as an owner of the 70-200 i can tell you its a great piece of glass! you wont regret buying it. just do a quick search on these forums and see how many people are happy with it, its gotta be the most popular telephoto...

Canon EOS 350D, Sigma 10-20 f4-5.6, 24-105 f4L IS, 70-200 f4L, 300 f4L IS, Kenko 1.4x pro300, 430EX, Apple Powerbook G4
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chrishunt

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Apr 05, 2006 17:26 | #3

I have owned the 70-200 f/4.0 and it is a wonderful lens. The 70-300 doesn't look bad at all though judging by Tirzah's post:

https://photography-on-the.net/forum/showthread.php?t=155798

If you need the extra 100mm and/or the IS, then get the 70-300...if you don't, then get the 70-200

Have fun making a tough decision.

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