Canon 70-200mm F4 L

hank_marvin

hank_marvin

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Hi, i got a price from kerso which was great but my question is

are the L lenses all tested before dispatch from canon? or 99% known that they are working well and good picture quality? just bit worried it may turn up and be a bit duff, not the fault of kerso of course or other online retailers, and then have to have it replaced.


so in the case of the 70-200mm F4 L has anyone had any bad copies?

Thanks in advance
 
IMHO and experience and also speaking to local retailers, bad copies of L lenses are very few and far between. They do exist, but are rare, so I'm told..

I've bought a Canon 300 f2.8L IS and 70-200L IS from Kerso and they're both pin sharp and on the money as far as focus accuracy is concerned..

I certainly believe Canon's QC on L glass is much higher than Sigmas EX range..

Hope this reassures in some way
 
Should be fine... *but* remember its possible for any lens not to come out the box calibrated perfectly for YOUR body. Well worth getting the camera and lens into a service centre for calibration to get the most out of what should be the most impressively sharp bit of glass you are likely to own.

Lots of people fail to understand this...
 
I had a duff copy of the 70-200 f/2.8 L IS earlier this year, severe front focusing but I think it was tied to the IS as the problem was worse when that was turned on. But that's the only problem I've had with L glass, the rest have been spot on :thumbs:
 
It means camera and lens into a Canon service centre... can make a world of difference actually.
 
No its the lens that is changed during calibration, not the body...

Which can of course give you problems if you have two bodies... but the answer is of course to dedicate a lens to a specific body.
 
It's highly unlikely that there will be any problem with your lens. I've got the 70-200 and the 100-400 all perfectly fine on 4 Canon bodies.

Try out the lens as soon as you get it just to make sure. Don't forget that at 200mm @ f4 the depth of field will be firly small, so make sure you pick a flat subject to test it on
 
No idea what its costs - only ever seen it done as a cheeky "can you do this while you have my camera" :D

To test it I'd look for the intructions for testing for front/back focus - there is a print out chart that you take pics of at 45 degrees... don't ask me where it came from though!
 
desantnik said:
No idea what its costs - only ever seen it done as a cheeky "can you do this while you have my camera" :D

To test it I'd look for the intructions for testing for front/back focus - there is a print out chart that you take pics of at 45 degrees... don't ask me where it came from though!
Click to expand...


http://www.focustestchart.com/chart.html

And my example when I tested out my first L lens..the 70-200 f4..

http://forum.warehouseexpress.com/message.asp?FTopicID=3335#79648

Hope this helps!
 
Don't take this the wrong way but you seem a bit paranoid about this, I appreciate it is a significant investment.

Having spent several £k on Canon glass the 70-200 f/4 still remains one of my favourites, it really is an excellent performer throughout its focal range

My advice, buy the lens and then get out there and take pictures and enjoy using it.

If your technique is sound and after a while you find you are disappointed with the results shot in good light, then it would be the time to start pixel peeping and using focus charts etc.
 
hank_marvin said:
ooo thats excellent markta, thanks, i'm gonna have a go at that with my kit lens for practice.

Glad i now know a good clear cut way of testing.
Click to expand...

No probs :thumbs: Though I'd agree with iGiDK's comments...

It can become an obsession, particulary as to whether the lens is sharp enough, less sharper than other's who have the same lens..

Most of it is user error, wrong technique etc. so blame the user before the equipment, post on here your technique etc. then I'm sure someone will help you with any errors etc.

As said previously, there a very few dud lenses out there, but having read posts, a lot of it is a shortcoming on the users part..

Hope that helps :thumbs:
 
lol na i spend a lot more time taking pics then the above and a chart wont be the first thing in my snazzy new white sight, just wanted to get a little bit of knowledge on the matter in case something was wrong, but im very excited about getting it and practicing with it, i've had some nice results with my kit lens so looking forward to the extra reach

cheers all
 
We've got 64 Canon "L" lenses. 63 of them have been fine. And even so I think we've been pretty unlucky.
 
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