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Author Topic: On a crop sensor...EF17-40L or EFS15-85?  (Read 3891 times)

GaryJ

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #15 on: August 06, 2013, 06:25:45 AM »
Having good fun with Sigma 18-35 f1.8 on my7D,lovely walkaround lens, sharp as all getout
7D,6D,100mmL IS f2.8 Macro,70-300mm L,MPE-65, 24-105 f4 L,50mm f1.8,70-200mm L f4,Siggy 150mmf2.8 Macro, Tokina 11-16mm Kenko Extenders and 1.4 TC [for 70-300]

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #15 on: August 06, 2013, 06:25:45 AM »

insanitybeard

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #16 on: August 06, 2013, 06:29:46 AM »
Having good fun with Sigma 18-35 f1.8 on my7D,lovely walkaround lens, sharp as all getout

Could be one to consider- I'm looking forward to seeing some reviews from Photozone etc for this lens, could be a real winner!
7D / EF-S 10-22 / 17-40L / 70-200 f4L IS / EF-S 60 macro

SpareImp

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #17 on: August 06, 2013, 07:35:53 AM »
The constant f/4 on the 17-40mm isn’t really an advantage, considering it only goes to 40mm. The 15-85mm is actually faster at the wide end, and goes all the way to 85mm (f/5.6). And the 17-40mm isn’t very sharp wide open. Not the one that I used to own. Had to stop it down to about f/8, and it still was far worse than my Tamron 28-75mm at the corresponding focal lengths. It’s its FF-compatible ultra wide angle abilities you would purchase it for. I’ve owned both, and the 15-85mm is the better choice.

alexturton

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #18 on: August 06, 2013, 08:18:16 AM »
I used the 17-40L on 7d for a few years as a general walk around. the IQ on crop is very good.

It is very small and light, the AF is super quick and accurate and its close focussing on crop yields some decent enough macro shots.

However 40mm f4 is not fast or long enough to create any decent subject isolation. I wasn't really using the lens for landscape purposes so I ended up selling it and got the 17-55 2.8 IS instead.

I cannot comment on the 15-85 but I can say that the 17-55 is a lovely lens. lightning AF, extremely accurate. Very sharp @ 2.8 (except for closest focusing distance where some residual aberations creep in, but @ the closest focussing distance you need to stop down anyway to create usable depth of field).

The 17-55 is a dust hoover and after a year of relatively light use my copy is full of dust. but I've never noticed any degregation in IQ.

I would say if your photographic focus is at the 17mm end, and you don't mind using a tripod in lower light, go for the 17-40m as the build quality is better, its weather sealed (if you add a filter) and can serve as a full frame lens should you upgrade.

Otherwise, if you want it for the longer end. I would get the 15-85 or the 17-55 f2.8
Bodies: 5d mk iii, 60d
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Promature

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #19 on: August 06, 2013, 08:52:16 AM »
Why not consider the 24-105mm?  It doesn't cost all that much more (check Amazon used or LensAuthority), has constant f4 aperature, is L glass, has IS, and has longer reach.  I used to have a 17-55 f2.8 on my T2i, but I found myself not using the wide end and wanted more reach.  The 24-105 got me there.
70D, 10-22mm, 24-105mm f4, 50mm f1.8, 85mm f1.8, 70-200 f2.8, 430EXII

dgatwood

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #20 on: August 06, 2013, 01:23:05 PM »
Why not consider the 24-105mm?  It doesn't cost all that much more (check Amazon used or LensAuthority), has constant f4 aperature, is L glass, has IS, and has longer reach.  I used to have a 17-55 f2.8 on my T2i, but I found myself not using the wide end and wanted more reach.  The 24-105 got me there.

Must have to do with the sorts of things you photograph.  A third of the photographs I've taken on a crop body are at a shorter focal length than 24mm.  If you're considering the 24-105, I'd suggest pairing it with an EF-S 10-22.

For a general walking-around lens, I'd definitely pick the 15-85 on a crop body without hesitation.

Patrick

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #21 on: August 06, 2013, 05:42:41 PM »
That is the closest to a consesus I've ever seen on the Canon Runors forum!  Thanks to all who gave me their input, the 15-85 will be it. The 50 f1.8 will be faster in low light and the 70-200 will have the required reach for my needs.
Thanks again.
Patrick

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Re: On a crop sensor...EF17-40L or EFS15-85?
« Reply #21 on: August 06, 2013, 05:42:41 PM »