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Author Topic: How many times did you return (L) lenses to get a good copy?  (Read 15525 times)

East Wind Photography

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #15 on: January 10, 2013, 09:42:50 PM »

Might also have to do with the body it's used with.  The AF issue is related to diffraction when the lens is wide open.  Images taken wide open show halos on highlights softening the edges.  The AF system has trouble getting a good lock due to unsharp edges.  It's a good test up front when a lens produces soft edges wide open it will often have difficulty locking on images that have noisy backgrounds or low contrast.  The 70-200 was sharp wide open so the AF system works more efficiently.

Tried 3 copies of the 100-400L and ended up returning the last one in favor of the 70-200  2.8l is II and 2xiii extender.  At 400mm the 100-400 was soft enough wide open that it interfered with AF lock.  It also focused slower than the latter with the extender.

I didn't see the point of suffering.  I don't believe they were all bad copies but rather a design "flaw"

Interesting. My 100-400 at 400mm is slightly sharper than my 70-200 II + 2xII or 2xIII, which is consistent with the TDP data (ISO 12233 crops).  I find focus speed in simple situations (bird on an isolated branch or flying with open sky behind) to be faster with the 100-400 at 400mm, but in complex situations (small bird in a thicket, for example) the 100-400 has trouble locking whereas the 70-200 II + 2x does not.

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #15 on: January 10, 2013, 09:42:50 PM »

Badger

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #16 on: January 10, 2013, 09:46:30 PM »
I'm a bit embarrassed to admit this, but I'm not even sure what to do to test a lens. I have had lenses I was frustrated with, but always assumed it was me. Can you all give me some guidance on how to test lenses? I do have two L lenses including a new 25-105 IS that I got with my 6D. I am honestly not too excited about it when it comes to sharpness.
Canon 6D, EF 70-200 f/4 L USM, EF 24-105 f/4 L IS USM, EF 35 f/2 IS USM, EF 50 f/1.8 II, EF 85 f/1.8 USM, 580EX

East Wind Photography

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #17 on: January 10, 2013, 09:52:16 PM »
Look up Reikan FoCal Pro.  See if your camera is supported.  You can run focus tests and recalibrate yourself.  It also can run through all F stop settings to determine which stop provides the sharpest image.  It's not 100% but its nice to know where your lens sweet spot is.

I'm a bit embarrassed to admit this, but I'm not even sure what to do to test a lens. I have had lenses I was frustrated with, but always assumed it was me. Can you all give me some guidance on how to test lenses? I do have two L lenses including a new 25-105 IS that I got with my 6D. I am honestly not too excited about it when it comes to sharpness.

crasher8

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #18 on: January 10, 2013, 09:54:55 PM »
Believe it or not I just returned a 135 f/2. Bad copy, soft. Turns out I'm not the only one this has happened to. I Gogled it.

I also have returned 2 17-40's. I take that back, I sold one and returned the other. I have an outstanding 24-105, 100 Macro , 40 pancake and 50 1.4. An UWA zoom for me is the toughest decision I have ever made. I am tempted by budget to try for a better copy of a 17-40 but I can't take the soft corners any longer. The 16-35 isn't good enough to justify the price and I would pick up the Tokina 16-28 in a heartbeat if the front element was protected and took filters. What to do?


rpt

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #19 on: January 10, 2013, 09:56:08 PM »
I'm a bit embarrassed to admit this, but I'm not even sure what to do to test a lens. I have had lenses I was frustrated with, but always assumed it was me. Can you all give me some guidance on how to test lenses? I do have two L lenses including a new 25-105 IS that I got with my 6D. I am honestly not too excited about it when it comes to sharpness.
http://www.canonrumors.com/tech-articles/how-to-test-a-lens/
Hope this helps :)


tphillips63

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #20 on: January 10, 2013, 09:59:25 PM »
I have had eight and returned none of them.  Maybe I should look at them again with some test screens, but I've never seen anything that stood out in my photos.
EOS 5D Mk III | EF 16-35/2.8L  | EF 24-105/4L IS | EF 70-200/2.8L II IS | TS-E 24mm f/3.5L II | EF 35mm f/1.4L | EF 40/f2.8 P | EF 50/1.2L | EF 180/3.5L | 600EX RT |

Dylan777

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #21 on: January 10, 2013, 10:10:22 PM »
In 2012:

1. 24-70 f2.8 II, tried 2 copies. Returned one and kept one
2. 50L, tried 4 copies. Kept 1 @ -1 AFMA and sharpness is above 800 at f1.2 with Focal. Returned lenses were -6 to -8 with sharpness below 780 in FoCal.
Body: 1DX -- 5D III
Zoom: 16-35L f4 IS -- 24-70L II -- 70-200L f2.8 IS II
Prime: 40mm -- 85L II -- 135L -- 200L f2 IS -- 400L f2.8 IS II

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #21 on: January 10, 2013, 10:10:22 PM »

infared

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #22 on: January 10, 2013, 10:29:05 PM »
Hmmm...I have 8 lenses and I have never tested ( with a chart), any of them. I did go out and run them thru the paces and give a real close look to the clarity, sharpness across the frame, and AF accuracy...but only real world images.
That's good enough for me....if you have a great shot...nobody notices any of the super, analysis tweaking anyway....
Just a fact.
« Last Edit: January 11, 2013, 04:39:24 AM by infared »
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LetTheRightLensIn

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #23 on: January 10, 2013, 10:31:42 PM »
At times, the 17-40L has been notorious for that (a few years ago many people complained about one side being worse and every single person always mentioned the same side so I wonder if there had not been some bad runs on it a few years ago). I exchanged my first one. Pretty huge difference.
Also exchanged a 24-70 II, they do seem to vary a bit in terms of how even all the edges are and how f/2.8 performance is, difference wasn't as radical as with the 17-40L though where one was just awful on one side and DOF was configured really weirdly.
Haven't returned anything else, L or not.
« Last Edit: January 10, 2013, 10:35:03 PM by LetTheRightLensIn »

victorwol

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #24 on: January 10, 2013, 11:24:27 PM »
16 L lenses so far, I have never have to return or repair one....
1D X - 5D MKIII - 7D - 24 f1.4L - 8-15 L - 50 1.2L - 85 1.2L - 15 2.8 - 16-35 2.8L - 24-105 4.0L - 70-200 2.8 LII - 24 TSE - 45 TSE - 90 TSE - MPE 65 - 180 f3.5L - 100 2.8L II - 580EX and a few Einsteins.

Mt Spokane Photography

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #25 on: January 10, 2013, 11:36:41 PM »
The only "L" lens I returned was a 24-70mmL.  It was average, which is to say not very good.  I owned five total of them before giving up on the likelyhood finding one I thought was excellent.
Now, I prefer primes and have not tried the new 24-70L.

pdirestajr

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #26 on: January 10, 2013, 11:39:28 PM »
I wonder how many people were shooting test charts and returning lenses in the film era.

I think it's crazy when people say things like, "my lens was a little soft at f/1.4 so I exchanged it", or "my ultra wide-angle lens' edges are soft wide open".  At what point are people chasing unrealistic and unnecessary expectations?
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Seanlucky

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #27 on: January 10, 2013, 11:49:47 PM »
Hey there, I'm a Productions Manager at Flashpoint Photographic Rentals based out of Vancouver, BC. Since we don't primarily rent camera equipment, we don't have the same numbers of Canon gear as an establishment like LensRentals. That being said, we do have 20 L series lenses in our rental pool. While we've never done an official testing on our gear (though I'm considering it with the slow winter months in the shop), We've never had a single complaint regarding sharpness on any of our lenses from any of our professional clients. I myself use many of these lenses extensively for my personal shoots, and have no complaints with any specific glass.

The only problem we've ever had (in the past 3 years that I've been on board) in the shop was a brand new (out of the box) EF 24-70mm f2.8L II, and that was a mechanical issue where the zoom was jamming up around 28mm (This lens was quickly replaced with no charge to ourselves).

Hope this helps your choices! We of course are dealing with a situation where AFMA is not an option because almost all of our clients are using their own cameras. Perhaps I can give you guys a followup if I get around to doing a full test as laid out by Roger Cicala.

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #27 on: January 10, 2013, 11:49:47 PM »

victorwol

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #28 on: January 10, 2013, 11:50:03 PM »
I don't test them... either I'm happy or not... I have checked and adjusted backfocusing on a few.
1D X - 5D MKIII - 7D - 24 f1.4L - 8-15 L - 50 1.2L - 85 1.2L - 15 2.8 - 16-35 2.8L - 24-105 4.0L - 70-200 2.8 LII - 24 TSE - 45 TSE - 90 TSE - MPE 65 - 180 f3.5L - 100 2.8L II - 580EX and a few Einsteins.

Dylan777

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #29 on: January 10, 2013, 11:56:21 PM »
I wonder how many people were shooting test charts and returning lenses in the film era.

I think it's crazy when people say things like, "my lens was a little soft at f/1.4 so I exchanged it", or "my ultra wide-angle lens' edges are soft wide open".  At what point are people chasing unrealistic and unnecessary expectations?

We should use today technology(Reiken FoCal, photoshop, or lightroom) as our advantages. Why settle with a  -10 back focus lens when you can select a better copy.
Body: 1DX -- 5D III
Zoom: 16-35L f4 IS -- 24-70L II -- 70-200L f2.8 IS II
Prime: 40mm -- 85L II -- 135L -- 200L f2 IS -- 400L f2.8 IS II

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Re: How many times did you return (L) lenses to get a good copy?
« Reply #29 on: January 10, 2013, 11:56:21 PM »