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Lenses Discussion of Lenses

Canon 24-105mm is L series lens

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  #1  
Old 16-02-11, 22:29
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Default Canon 24-105mm is L series lens

Hi all, after a bit of advice here, I have several lenses and by far my all round favourite is the above, recently I'm having focus issues with the lens whereby when using spot on eyes etc I manage to get a nasty blur when I download the images to PC, The lens is very clean, I have tried high ISO, tried flash etc etc but cannot seem to get a good AF.

The lens is on my Canon 5D MKII and has been used for approx 3500 shots.

I know there is a micro adjustment in camera but don't want to touch this not knowing what the hell I am doing with it..

I'm still reasonably new to DSLR this being my first one and purchased a year ago..

Any help would be muchly appreciated.. Tar
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Old 17-02-11, 14:20
john crossley john crossley is offline
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Quote:
Originally Posted by Nemesis View Post
..I'm having focus issues with the lens whereby when using spot on eyes etc I manage to get a nasty blur when I download the images to PC...
Does this happen with any of your other lenses.



Quote:
Originally Posted by Nemesis View Post
...I know there is a micro adjustment in camera but don't want to touch this not knowing what the hell I am doing with it...
This is very easy and straighforward to do, but is rather labourious.
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Old 17-02-11, 14:57
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As John says "does this happen with any of your other lenses"?

As for MA-ing your lens this is very simple, download a focus test chart.

http://www.dphotojournal.com/downloa...us-test-chart/

however this will only adjust the camera/lens for front or back focus.

I guess you need to check whether indeed this is front/back focussing.

I assume you have switched to manual focus and used Liveview at full 10x magnification, if only as a test.

Harry
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Old 17-02-11, 16:48
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Can you upload a sample, possibly with the exif still intact!
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Old 17-02-11, 17:14
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Hi All

Thanks for advice, will try to upload a sample in a short while..
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Old 17-02-11, 18:13
robski robski is offline
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Does this lens have a UV filter fitted ?
If so have you tried it without ?
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Old 17-02-11, 18:39
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Yep tried without, Just looking at some of the images that were ruined, when you half depress the shutter on the eyes and re compose, press the shutter and take the pic, in DPP will it always just show where the centre AF point (Highlighted Red) was when you took the pic rather than where you metered from?
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Old 17-02-11, 19:29
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Right I fired off some test shots and it seems to be not completely sharp across all three of my lenses, with auto focus, with manual focus I can get pretty much what I want..
In Canon settings, what is the default setting for AF is it stop or start as I used to have no problems with this beast, it has never been dropped or knocked I have taken much care with my lenses...
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Old 17-02-11, 19:35
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Image from test sheet
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File Type: jpg IMG_4051a.jpg (243.4 KB, 20 views)
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  #10  
Old 17-02-11, 19:43
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EXIF Data from camera
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File Type: jpg Untitled-1.jpg (95.8 KB, 12 views)
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