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FORUMS Photography Talk by Genre General Photography Talk
Thread started 11 Mar 2005 (Friday) 17:42
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How do I know if my lens is to slow/fast?

 
avdh20
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Ok I am a Newbie to this site, and by reading the threads everyone here seems pretty helpful. Im also new at this whole SLR thing too, considering I just purchased my 20D a month ago. Anyway I've been reading some threads and noticing that people say that their lenses are to slow or to fast. In that case they are needed to use a flash. What does that mean, when they say their lens is to slow? Dumb question, i know. But I'm just trying to learn. Thanks.

Mar 11, 2005 17:42

Canon 7D - Canon 70-200 f/2.8 IS - Canon 85mm f/1.2
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pcasciola
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Slow lens = small maximum aperture, like f/5.6 or higher, requiring slower shutter speeds
Fast lens = larger aperture, like 1.8 or 2.8, allowing faster shutter speed

Mar 11, 2005 17:45

Philip Casciola
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Canon 7D, EF 50/1.8, EF 85/1.8, EF 300/4L IS, EF-S 18-55, Tamron 28-75/2.8, EF 70-200/2.8L IS
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Ogrt48
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Oh and both of those lens you have are slow. :D

Mar 11, 2005 17:58 as a reply to pcasciola's post 13 minutes earlier.

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HJMinard
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Basically ... a slow lens is less useful in low light conditions without the use of a tripod.

From a performance standpoint, I don't think a lens can ever be "too fast". However, fast lenses are often quite large, heavy and expensive.

Mar 11, 2005 19:04

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Sydor25
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HJMinard wrote:
From a performance standpoint, I don't think a lens can ever be "too fast". However, fast lenses are often quite large, heavy and expensive.

Except for the 50mm f/1.8. It is worth every penny and then some. Do yourself a favor and pick one up, it will be the best $80 you've spent.

Mar 11, 2005 21:09 as a reply to HJMinard's post 2 hours earlier.

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avdh20
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Thanks for the replys-What lenses would you guys/gals suggest buying? I just ordered the 50mm 1.8 from B&H so that should be here Tuesday. I really hate my 75-300 and im looking to trade that in for the 70-200mm L lens.

Mar 12, 2005 11:29 as a reply to Sydor25's post 14 hours earlier.

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pcasciola
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It's impossible to recommend lenses without knowing what you are looking to use them for, but the 50/1.8 is always a nice-to-have, and the 70-200/4L is arguably the best bang for the buck L lens there is. For me it's a tough choice between that and the Sigma 70-200/2.8 EX HSM for a lens covering that range in the $600-700 range.

Have a look here:
http://photography-on-the.net/forum/showthre​ad.php?t=56752

Mar 12, 2005 11:47 as a reply to avdh20's post 18 minutes earlier.

Philip Casciola
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Canon 7D, EF 50/1.8, EF 85/1.8, EF 300/4L IS, EF-S 18-55, Tamron 28-75/2.8, EF 70-200/2.8L IS
Sigma 1.4x & 2x, Tamron 1.4x, Gitzo 2220 Explorer, 322RC2 grip

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liza
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The 100mm f/2 is a pretty decent lens, too, and isn't prohibitively expensive. The Tamron 28-75 f/2.8 isn't a bad lens either from what I've heard. I'll probably get that one next, although the 85mm f/1.8 is also tempting. Like Phil said, it's difficult to give advice if we don't know what you're planning to shoot.

Mar 13, 2005 22:40


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avdh20
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I guess you could say that I shoot it all. It doesnt matter what it is, I just love taking the pic. So what ever you all suggest is prob. what im gonna buy. To start, maybe a good lense for low light applications?

Mar 13, 2005 22:56 as a reply to liza's post 16 minutes earlier.

Canon 7D - Canon 70-200 f/2.8 IS - Canon 85mm f/1.2
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liza
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The 85mm f/1.8 is a good lens for both portraits and sports (especially basketball!). The 70-200 f/4L is an awesome lens with excellent color, although it isn't considered "fast." Most people who shoot fast action or in low light conditions opt for the 70-200 f/2.8. I'll have to save for a while to get that one!

Mar 14, 2005 19:09


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How do I know if my lens is to slow/fast?
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