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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 09 Mar 2010 (Tuesday) 09:22
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17-55IS vs 15-85IS. Reach vs speed

 
mrklaw
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Mar 09, 2010 09:22 |  #1

Hi

Just about to pull the trigger on a 7D. Not sure whether to get the 15-85IS as a kit, or the 17-55IS as a walkaround lens.

The 15-85 is getting good feedback, and I think I would appreciate the increased reach - my previous walkaround was a 24-105. But the f2.8 on the 17-55 is a lot faster than the f5.6 on the 15-85. Costwise if I go for the 17-55 I'd buy from kerso so the overall cost would be similar to a UK 15-85 kit, around £1700 for body+lens.

Has anyone already made the choice between these lenses? any images that would show the relative loss of reach?

I'd eventually have a couple of primes for low light/indoor stuff. Probably canon 85/1.8 and the sigma 30/1.4.


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Electric ­ Shepherd
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Mar 09, 2010 09:27 |  #2

I'm in a similar conundrum re 17-55 vs 15-85. There's quite a few threads here and articles on web about it. A useful comparison I found was on the-digital-picture.com, which compared those 2 along with the 18-55, 17-85 and a couple of others. The 17-55 and 15-85 where very simlar in the 17-55 range with v little to tell them apart.

The 17-55 of course has the 2.8 advantage, but it has terrible resistance to flare, so as someone who likes shooting landscapes a lot I think I'm going to go with the 15-85.

Your needs may be different of course.


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gjl711
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Mar 09, 2010 09:34 |  #3

Reach vs speed, your title says it all. Whichever you choose, your going to get a very nice lens. So you have to decide whats more important. I think all other factors are negligible.


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tkbslc
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Mar 09, 2010 09:45 |  #4

Yep, reach vs speed. Pick one.


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Jethro790
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Mar 09, 2010 09:54 as a reply to  @ tkbslc's post |  #5

Owned both... only one remains, and I tell you right now, I do not miss my 17-55.


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tkbslc
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Mar 09, 2010 09:59 |  #6

Okay, I will add one more note. F2.8 is not fast enough to use without a flash in quite a lot of indoor settings.


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Mar 09, 2010 10:25 |  #7

tkbslc wrote in post #9759680 (external link)
Okay, I will add one more note. F2.8 is not fast enough to use without a flash in quite a lot of indoor settings.

+1

Regards, :D


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mrklaw
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Mar 09, 2010 10:28 |  #8

tkbslc wrote in post #9759680 (external link)
Okay, I will add one more note. F2.8 is not fast enough to use without a flash in quite a lot of indoor settings.

now this is interesting. If so I'll just go for the 15-85 and then look at primes for indoor stuff or a flash.


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Electric ­ Shepherd
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Mar 09, 2010 10:47 as a reply to  @ mrklaw's post |  #9

I'd agree. Try it yourself with your 85 f/1.8 set to 2.8 and see how you manage whilst keeping the ISO manageable.


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mrklaw
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Mar 09, 2010 10:59 as a reply to  @ Electric Shepherd's post |  #10

I don't actually have an 85 1.8 yet. Or a 7D body :P


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ecka
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Mar 09, 2010 11:09 |  #11

Don't forget one important thing about 7D. For the best AF performance you must have a fast lens (f/2.8 or wider), to use the full potential of the center point.


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probe1957
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Mar 09, 2010 11:11 |  #12

I was facing the same dilemma. I rented both lenses to check them out a few months back. I concluded, as tkbslc said, that f2.8 just isn't fast enough in too many indoor situations. I decided on the 15-85 and, as indicated in my other thread, just got it today.

Ultimately, I think whatever you decide, you will be pleased.




  
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krb
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Mar 09, 2010 11:22 |  #13

ecka wrote in post #9760136 (external link)
Don't forget one important thing about 7D. For the best AF performance you must have a fast lens (f/2.8 or wider), to use the full potential of the center point.

You don't the high precision X point but the larger DOF on an f/4 or f/5.6 means that you generally don't need as much precision.


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tkbslc
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Mar 09, 2010 11:29 |  #14

krb wrote in post #9760229 (external link)
You don't the high precision X point but the larger DOF on an f/4 or f/5.6 means that you generally don't need as much precision.

Agreed, not something to worry about.


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muusers
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Mar 09, 2010 11:34 |  #15

tkbslc wrote in post #9759680 (external link)
Okay, I will add one more note. F2.8 is not fast enough to use without a flash in quite a lot of indoor settings.

Its still faster. Could save you the change to a prime.


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17-55IS vs 15-85IS. Reach vs speed
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