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Canon 70-200 F4L Is Problem/Quesiton  
User currently offlinelen90 From United States of America, joined Jul 2006, 600 posts, RR: 0
Posted (1 year 1 week 5 days 14 hours ago) and read 3009 times:

Hello everyone!

I have been a loyal Canon user for about 7 years now. I've had 70-200 F4L lenses for almost all that time. About three months ago I decided to get the 70-200 f4L IS figuring it would be just as amazing (image quality wise) and offer some more given the stabilizer. After three months the lens was at Canon for a new USM and objective 6/7 IS. I know this is a really popular lens on airliners along with the f2.8 big brother, so has anyone else experienced problems with it?

I tried requesting Canon to replace it, but the most they were willing to budge was an additional 6 months of warranty after my one year is up. I just picked up the lens so I definitely will test it out next week when the weather clears up. However, there is a big part of me that really just wants the lens replaced. The Canon service center claims that this happens frequently with jostling and use. To me that seems pretty far out as I baby my camera and having had the 70-200 without the IS for so long with no issues.

As for the age of the build, according to the date code it was built in Aug. of 2012 and I purchased it new in July 2013.

Anyone else experience problems similar to this or did I just get a defective lens?


Len90
4 replies: All unread, jump to last
 
User currently offlineckw From UK - England, joined Aug 2010, 745 posts, RR: 16
Reply 1, posted (1 year 1 week 5 days 13 hours ago) and read 2980 times:

Have a look at this

http://www.lensrentals.com/blog/2013.../lensrentals-repair-data-2012-2013

The point is ALL lenses may fail - with some the likelihood of failure is higher, but none are bullet proof.

Yes, you may have got a bad copy. It happens. But I would look at your situation like this - you now have a lens which has been repaired and individually tested. It should be as good as it can be. A replacement lens will be a lottery, with a small chance of you getting another bad copy/

In terms of personal experience, I had a very early copy of the 70-200 f4, and it has seen a lot of hard use in harsh environments. No problems what so ever.

Cheers,

Colin



Colin K. Work, Pixstel
User currently offlinelen90 From United States of America, joined Jul 2006, 600 posts, RR: 0
Reply 2, posted (1 year 6 days 14 hours ago) and read 2696 times:

So as a quick update to this issue:
Got the lens back last week Friday. Due to scheduling, this afternoon was the first chance I had to test out the lens. On review I noticed that the left side of the image (which was the tail section of all the planes) had blurred/double vision. Canon tech support claims it probably now is a crooked objective. Lens is heading back to Canon on Monday morning.

Quoting ckw (Reply 1):
Yes, you may have got a bad copy. It happens. But I would look at your situation like this - you now have a lens which has been repaired and individually tested. It should be as good as it can be. A replacement lens will be a lottery, with a small chance of you getting another bad copy/

I would have thought this too as they supposedly did test the lens. Canon is requesting my body, lens, and sample pictures on a disk to review the issue. I personally want out of this lens.

I too have a 70-200 f4L that is around 7-8 years old. The lens is a champ that has seen rough use and never an issue. The plan was to sell that off or keep it as a spare on the old trusty 30D. I figured the f4L IS was a nice upgrade as the IS does help with slowing down the shutter speed and still getting crisp results without a tripod. I just wish my IS copy was even half as reliable and trustworthy as my old non IS version. It just feels like $1,4000 wasted.  



Len90
User currently onlinedendrobatid From United Kingdom, joined Nov 2004, 1671 posts, RR: 62
Reply 3, posted (1 year 6 days 6 hours ago) and read 2660 times:
AIRLINERS.NET CREW
HEAD SCREENER

I think the problem you describe might well be at the subject end rather than the camera end ! What you are describing sounds like motion blur to me and it would be useful to see some results along with the settings that you used. Your comment about the IS above leaves me wondering if you are dropping your shutter speed and expecting too much of the IS?
No matter how steady the lens, if the shutter speed is too low the movement of the subject can be significant during a slow exposure and that can lead to part of the subject being blurred. I am rather obsessed with good prop blur so use low shutter speeds a lot and this can be an issue for me even though my subjects tend to be moving relatively slowly.

I would suggest putting the camera and lens on a tripod perfectly square to a brick wall (with the IS off) and photographing at various apertures .and focal lengths That will show if the lens is defective before sending the whole kit back to Canon. If the wall is not sharp across the frame, especially with the lens stopped down a little, then the whole lot does need to go back as it could be that the sensor is slightly misaligned too.

Mick Bajcar


User currently offlinelen90 From United States of America, joined Jul 2006, 600 posts, RR: 0
Reply 4, posted (1 year 6 days 5 hours ago) and read 2654 times:

Mick, really appreciate your input!

Sun behind me, ISO 125, f7.1, shutter speed 1/1000, focal distance 169. Lens IS was on mode 2 like it should be for a moving subject.

Attached is a jpg off the camera card for you to look at. I've never had anything like this in my few years with photography so any advice will be welcomed. I don't have a tripod with me at my school apartment, but I do have my 24-105 with me. I guess I can shoot with that lens to quickly rule out my sensor being misaligned. The body did just come back from a cleaning as well. So that is something to think about as As for sending it back to Canon, I live in NJ so it is just being driven over to their facility in Jamesburg.

I know the tail is off towards the side of the frame, but I have had pictures accepted on here with this lens with planes sitting in the same area of the frame: http://www.flickr.com/photos/9308224...0341223083/sizes/o/in/photostream/


EDIT: Looked at the card have a picture of the fence settings were ISO125, f7.1, 1/640, and focal distance 280. You can see the fence gets a bit blurry on that side of the frame. I know not a perfect setup with a tripod and all, but does this help at all?
http://www.flickr.com/photos/9308224...0341191686/sizes/o/in/photostream/

[Edited 2013-10-18 00:12:50]


Len90
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