T
thatcherk1
Guest
Hello all,
I have a 5D mkII and mkIII and a 70-200 2.8IS mkII.
I noticed recently that it seems to have some extra vignetting in the corners at certain focal lengths (seeminly beyond typical vignetting on FF camera). 70mm seems normal, 100mm seems the worst where the vignette has the sharpest edge. 135mm and 200mm it's apparent, but the fade is softer, still bad though in my opinion. I find that putting on filters makes it worse. I put on a thin, normal sized clear 77mm filter on and the vignette intensifies. I've never had one clear filter add vignetting of any kind, especially when zooming in.
I can't find any samples of from my old mark I where there is this problem. And I've rented 3 different copies of the mark II (3 different serial numbers) where I've also not seen the problem.
I have sent this lens to Canon 3 times in the past month. Each time I get it back, they tell me that it's normal vignetting and the lens is up to spec. It's currently still at Canon and I'm battling it out with the engineer trying to convince him there really is a problem with this copy.
I use this lens primarily for landscape work, where I have to mess with contrast in a hazy city. Adding contrast obviously magnifies the problem. But like I said, I've never encountered the problem on 3 other copies of the lens, nor my old mark I under boosted contrast situations.
When I apply lens vignette correction in both LR3 and LR4 I get this weird halo effect where the lense's natural vignetting seems to be taken out, but this extra vignetting remains. When I spit out .jpgs from my 5DIII I don't get the halo effect quite as much, but the corners are still clearly vignetting.
I understand that software lens correction both by Adobe and Canon are not perfect, but on every other 70-200, or any other lens I've used I get much much better results than I am with this lens.
I sent in to Canon a series of tests from this lens on my 5DIII with different focal lengths, both with and without the clear filter. All tests were done at f5.6 where vignetting should be fairly mellow to begin with, and it's the stop I shoot at the most. I also put focus at infinite where the problem seemed worse, and where I typically use my lens.
MY QUESTIONS FOR YOU:
BELOW are the two .jpgs of the lens at 100mm f5.6 focus:infinite on 5Diii with in-camera vignette removal applied, one with a clear filter, one without. Picture Style is standard with contrast bumped to max.
Does this seem typical for most of you? Do you experience this kind of vignetting even after in-camera removal?
Am I crazy and these images are just fine? BELOW are also links to the RAW files for these .jpgs where you can see them without vignette removal and with contrast at Adobe's standard.
ALSO, would anyone be willing to replicate my tests with their own 5D, either markII or markIII and their 70-200 2.8IS mkII? If so, here was my setup:
-Tripod shooting large, white posterboard with direct sunlight.
-100mm, f5.6, focus:infinite, evaluative meetering with no compensation (so the white posterboard turned out grey)
-Can you do a test with and without a standard clear or UV filter.
-Feel free to do 70mm, 135mm, and 200mm as well.
-And can you email the RAW results:
[email protected]
I'm not typically super critical of my gear. I only am making a stink to canon and now here because I saw the bad results in some of my recent landscapes. I don't want to have to carefully add a grad in Lightroom every time the problem shows up in a real photograph.
And as a side note, I haven't shot with a crop camera for a while. So I'm not comparing to what it looks like compared to a crop frame camera, where there is less vignetting overall.
And please don't tell me that I need to stop obsessing with my gear and should just go outside and shoot. This is a problem that has come up in real situations, and I'm trying to remedy the problem with Canon, or get convinced by some of you who can do the test yourselves and show me that I'm out of my mind and there is no problem.
5DIII/100mm/f5.6/focus:infinity/Standard Picture Style with contrast up all the way/in-camera vign. removal turned on
WITH FILTER:
5DIII/100mm/f5.6/focus:infinity/Standard Picture Style with contrast up all the way/in-camera vign. removal turned on
WITHOUT FILTER:
RAW VERSIONS---
WITH FILTER:
http://dl.dropbox.com/u/2077993/70200vignette/TKA_0085.dng
WITHOUT FILTER:
http://dl.dropbox.com/u/2077993/70200vignette/TKA_0086.dng
Thanks,
Thatcher
[email protected]
thatcherkelley.com
I have a 5D mkII and mkIII and a 70-200 2.8IS mkII.
I noticed recently that it seems to have some extra vignetting in the corners at certain focal lengths (seeminly beyond typical vignetting on FF camera). 70mm seems normal, 100mm seems the worst where the vignette has the sharpest edge. 135mm and 200mm it's apparent, but the fade is softer, still bad though in my opinion. I find that putting on filters makes it worse. I put on a thin, normal sized clear 77mm filter on and the vignette intensifies. I've never had one clear filter add vignetting of any kind, especially when zooming in.
I can't find any samples of from my old mark I where there is this problem. And I've rented 3 different copies of the mark II (3 different serial numbers) where I've also not seen the problem.
I have sent this lens to Canon 3 times in the past month. Each time I get it back, they tell me that it's normal vignetting and the lens is up to spec. It's currently still at Canon and I'm battling it out with the engineer trying to convince him there really is a problem with this copy.
I use this lens primarily for landscape work, where I have to mess with contrast in a hazy city. Adding contrast obviously magnifies the problem. But like I said, I've never encountered the problem on 3 other copies of the lens, nor my old mark I under boosted contrast situations.
When I apply lens vignette correction in both LR3 and LR4 I get this weird halo effect where the lense's natural vignetting seems to be taken out, but this extra vignetting remains. When I spit out .jpgs from my 5DIII I don't get the halo effect quite as much, but the corners are still clearly vignetting.
I understand that software lens correction both by Adobe and Canon are not perfect, but on every other 70-200, or any other lens I've used I get much much better results than I am with this lens.
I sent in to Canon a series of tests from this lens on my 5DIII with different focal lengths, both with and without the clear filter. All tests were done at f5.6 where vignetting should be fairly mellow to begin with, and it's the stop I shoot at the most. I also put focus at infinite where the problem seemed worse, and where I typically use my lens.
MY QUESTIONS FOR YOU:
BELOW are the two .jpgs of the lens at 100mm f5.6 focus:infinite on 5Diii with in-camera vignette removal applied, one with a clear filter, one without. Picture Style is standard with contrast bumped to max.
Does this seem typical for most of you? Do you experience this kind of vignetting even after in-camera removal?
Am I crazy and these images are just fine? BELOW are also links to the RAW files for these .jpgs where you can see them without vignette removal and with contrast at Adobe's standard.
ALSO, would anyone be willing to replicate my tests with their own 5D, either markII or markIII and their 70-200 2.8IS mkII? If so, here was my setup:
-Tripod shooting large, white posterboard with direct sunlight.
-100mm, f5.6, focus:infinite, evaluative meetering with no compensation (so the white posterboard turned out grey)
-Can you do a test with and without a standard clear or UV filter.
-Feel free to do 70mm, 135mm, and 200mm as well.
-And can you email the RAW results:
[email protected]
I'm not typically super critical of my gear. I only am making a stink to canon and now here because I saw the bad results in some of my recent landscapes. I don't want to have to carefully add a grad in Lightroom every time the problem shows up in a real photograph.
And as a side note, I haven't shot with a crop camera for a while. So I'm not comparing to what it looks like compared to a crop frame camera, where there is less vignetting overall.
And please don't tell me that I need to stop obsessing with my gear and should just go outside and shoot. This is a problem that has come up in real situations, and I'm trying to remedy the problem with Canon, or get convinced by some of you who can do the test yourselves and show me that I'm out of my mind and there is no problem.
5DIII/100mm/f5.6/focus:infinity/Standard Picture Style with contrast up all the way/in-camera vign. removal turned on
WITH FILTER:
5DIII/100mm/f5.6/focus:infinity/Standard Picture Style with contrast up all the way/in-camera vign. removal turned on
WITHOUT FILTER:
RAW VERSIONS---
WITH FILTER:
http://dl.dropbox.com/u/2077993/70200vignette/TKA_0085.dng
WITHOUT FILTER:
http://dl.dropbox.com/u/2077993/70200vignette/TKA_0086.dng
Thanks,
Thatcher
[email protected]
thatcherkelley.com