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Archive 2008 · 70-200 F4 IS bad batch

  
 
Daan B
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p.3 #1 · 70-200 F4 IS bad batch


tom s wrote:
Get primes (135 2, 200 2.8) if you're into close-up or portrait photography.
70-200 f/4 IS is more of landscape lens.


I use it for close-up portraits (100-135mm) all the time with excellent results



May 03, 2008 at 01:41 PM
mendofr
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p.3 #2 · 70-200 F4 IS bad batch


Need your opinion. I'm suspecting that I have a bad copy of this lens.

By looking at the picture below, could you guys tell me if I truly have a bad copy. Thanks a lot.

Late afternoon, 200mm, mfd, f5.6, 1/500 sec handheld.




May 03, 2008 at 11:37 PM
Daan B
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p.3 #3 · 70-200 F4 IS bad batch


mendofr wrote:
Need your opinion. I'm suspecting that I have a bad copy of this lens.

By looking at the picture below, could you guys tell me if I truly have a bad copy. Thanks a lot.

Late afternoon, 200mm, mfd, f5.6, 1/500 sec handheld.


Is this a 100% crop? If so, it is not looking bad for a 200mm MFD shot. If not, please post a 100% crop.



May 04, 2008 at 01:00 AM
mendofr
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p.3 #4 · 70-200 F4 IS bad batch


No. it's as is. Let me see if I can do a 100% crop. Thanks.


May 04, 2008 at 01:08 AM
mendofr
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p.3 #5 · 70-200 F4 IS bad batch


Oh. Oh. I don't know how to do a 100% crop.


May 04, 2008 at 01:12 AM
mendofr
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p.3 #6 · 70-200 F4 IS bad batch


Not sure if this is 100% crop. I used the trimming tool of Digital Photo Professional and cropped a small section of the flower.

How does this look? Does this mean I have an acceptable copy?




May 04, 2008 at 01:17 AM
Daan B
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p.3 #7 · 70-200 F4 IS bad batch


I get similair results with my copy. Looks OK to me for 200mm MFD. A little USM and it looks very sharp





May 04, 2008 at 01:29 AM
mendofr
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p.3 #8 · 70-200 F4 IS bad batch


very cool. now I don't feel as badly as before. thanks for your opinion. i will send this lens to canon factory anyway as I noticed some back focusing issues in my other shots.


May 04, 2008 at 01:34 AM
Daan B
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p.3 #9 · 70-200 F4 IS bad batch


mendofr wrote:
very cool. now I don't feel as badly as before. thanks for your opinion. i will send this lens to canon factory anyway as I noticed some back focusing issues in my other shots.


Are the back focusing issues at 200 MFD to about 3 meters?

In such a flower shot AF easily can compensate/cover up any back or front focusing issues.

My copy has a back focus at 200mm MFD to 3 meters. From 3 meters to infinity the back focus is gone. I had it checked by Canon Service. They told me they could let the lens focus properly at 200mm MFD. But that most certainly would mean a decrease in performance on other FL's / focus distances. I believe that the mis focus you are experiencing is part of the way the lens was designed.

Try if you can get better reults by focusing manually at 200 MFD with flat test surfaces (like a newspaper on a wall or something).

Edited on May 04, 2008 at 01:44 AM



May 04, 2008 at 01:42 AM
yauyi
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p.3 #10 · 70-200 F4 IS bad batch


I was about to send this lens back for a replacement or refund on Monday, but decided to test it in the field again, I did not even bother to try MFD at 200mm knowing it sucks anyway, but the performance in any other focal range is pretty darn good. I believe this one is around 12ft

200mm 1/250s @F4.0 :
Resized:
http://i.pbase.com/g3/00/841900/2/96541253.iXuD6glL.jpg



100% crop:
http://i.pbase.com/o2/00/841900/1/96541835.Ji77VZUX.IMG_0234c.jpg



Converted from RAW to JPG with DPP, Default "Standard" picture style.


Color reproduction, contrast, and bokeh quality of this lens is very nice, I might just keep it and deal with the MFD problem at 200mm.

http://i.pbase.com/g3/00/841900/2/96541246.FuMIhG32.jpg


http://i.pbase.com/g3/00/841900/2/96541247.A9NA6UFy.jpg


http://i.pbase.com/g3/00/841900/2/96541251.cELw8nMD.jpg



I ran a series of 135mm and 200mm test from f/4.0 to f/8.0 comparing this lens to my 100-400L in a control environment, test subject measured at 9ft. if anybody interested you can see it here:
http://www.pbase.com/yauyi/lens_test


















Edited on May 04, 2008 at 02:34 AM



May 04, 2008 at 02:15 AM
Daan B
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p.3 #11 · 70-200 F4 IS bad batch


yauyi wrote:
I was about to send this lens back for a replacement or refund on Monday, but decided to test it in the field again, I did not even bother to try MFD at 200mm knowing it sucks anyway, but the performance in any other focal range is pretty darn good.

Color reproduction, contrast, and bokeh quality of this lens is very nice, I might just keep it and deal with the MFD problem at 200mm.


I came to the same conclusion and never regretted it for one bit. Besides the 200mm MFD "issue" this is a very fine lens



May 04, 2008 at 03:27 AM
mfurman
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p.3 #12 · 70-200 F4 IS bad batch


mendofr:
How does this look? Does this mean I have an acceptable copy?


The only way to see how this lens performs at 200 mm and MDF is to compare 135 and 200 mm shits (both at MFD). This type of image, you included, is difficult to access but I do not find it as sharp as I would find acceptable for this zoom, at 135 mm. It is probably more typical for 200 mm and MFD.



May 04, 2008 at 04:02 AM
mfurman
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p.3 #13 · 70-200 F4 IS bad batch


To yauyi:

I looked at your tests and I think that your 100-400 f/4.5-5.6 L IS is very good
My 70-200 f/4.0 L IS with 1.4x TC and 8 feet was much sharper than my 100-400



May 04, 2008 at 04:09 AM
mendofr
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p.3 #14 · 70-200 F4 IS bad batch


I will do another test. MFD 135 & 200


May 04, 2008 at 12:01 PM
mendofr
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p.3 #15 · 70-200 F4 IS bad batch


To yauyi:

Looked at your pictures and I the shootout between 70-200 and 100-400 look the same to me. I guess I'm not much help. : )



May 04, 2008 at 12:26 PM
mendofr
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p.3 #16 · 70-200 F4 IS bad batch


Here's another simple test I did for my lens.

Focused on the '0' of '70'.

200mm, mfd, f4, 1/320, spot, no pp.


Cropped.




135mm, mfd, f4, 1/400, spot, no pp



cropped.


Do the pictures have acceptable sharpness for this lens? Do I need to send this to Canon? Thanks for your help again.







Edited on May 04, 2008 at 12:59 PM



May 04, 2008 at 12:31 PM
yauyi
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p.3 #17 · 70-200 F4 IS bad batch


mfurman wrote:
To yauyi:

I looked at your tests and I think that your 100-400 f/4.5-5.6 L IS is very good
My 70-200 f/4.0 L IS with 1.4x TC and 8 feet was much sharper than my 100-400



mendofr wrote:
To yauyi:

Looked at your pictures and I the shootout between 70-200 and 100-400 look the same to me. I guess I'm not much help. : )



In that series of test when subject was 9ft away, here is what I found:

At 135mm, my 100-400 did not catch up in sharpness till f/8.0.

At 200mm, no matter which f-stop the 70-200 simply can not touch 100-400.

But the 70-200 has better bokeh, and I think it has a tiny bit more punch in color reproduction than the 100-400 as well. It's hard to pick which is a better lens, they both complimented each other very well.



May 04, 2008 at 02:13 PM
mendofr
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p.3 #18 · 70-200 F4 IS bad batch


To yauyi:

So is this the 70-200 that you were complaining about initially? Are you now keeping your lens?



May 04, 2008 at 02:26 PM
mfurman
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p.3 #19 · 70-200 F4 IS bad batch


mendofr:
Do the pictures have acceptable sharpness for this lens? Do I need to send this to Canon? Thanks for your help again.


I think that your 200 mm at MFD is fine and that 135 mm could have been somewhat better. I have to admit that I have a better feel if the lens is sharp when I am testing myself.

Have a look at some of my tests (for comparison):

http://mfurman.smugmug.com/Photography

in folder "Canon EF 70-200 f/4.0 L IS - tests"

Click on "photo info" to see what focal length etc, it was.

By the way, all the pictures here:

http://mfurman.smugmug.com/gallery/2897322_BdwBF#179799256_bfFyu

were taken with 70-200 f/4.0 L IS


Edited by mfurman on May 04, 2008 at 04:20 PM GMT

Edited on May 04, 2008 at 04:20 PM



May 04, 2008 at 02:56 PM
mfurman
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p.3 #20 · 70-200 F4 IS bad batch


yauyi:
It's hard to pick which is a better lens


It was easy for me You either have an outstanding 100-400 or not so good (at 200 mm) 70-200 f/4.0 L IS

Edited by mfurman on May 04, 2008 at 04:32 PM GMT

Edited on May 04, 2008 at 04:32 PM



May 04, 2008 at 02:59 PM
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