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How to fine tune lenses

Mike R , Feb 08, 2013; 01:40 p.m.

I read on these forums a lot about "fine-tuning" lenses so that they can perform to their maximum capabilities. I have checked the auto-focusing of my D300s for all my lenses shooting a brick wall, and they all seem to be spot-on. I know this because when I manually turn the focus ring after autofocusing, the image blurs. But then I read on these forums that "all lenses need to be fine tuned". Is there a better way of doing this?


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Lex Jenkins , Feb 08, 2013; 02:01 p.m.

But then I read on these forums that "all lenses need to be fine tuned".

Be sure to check the sign that should be above the door to every forum: "Abandon all hope, ye who enter here."

If the internets are to be believed, there is not a single D7000 that is capable of autofocusing, DX dSLRs are useless, the moon landing was faked because the astronauts failed to recover any green cheese, and My Bloody Valentine are releasing a new album.

One of these is true.

Peter Cohen , Feb 08, 2013; 02:30 p.m.

Wait! There's no green cheese or they just neglected to bring some back?

Bruce Brown , Feb 08, 2013; 02:55 p.m.

Mike : +1 for Lex and Peter ... and also, "if it ain't broke, don't fix it", or, alternatively, "fixate not".

Bruce Brown , Feb 08, 2013; 03:14 p.m.

Mike: One of the 'terns around here has just given me a polite 'dope slap' for not answering your Q ... try here:http://forums.dpreview.com/forums/thread/3377109 it will give you ONE way to do this. Read the whole thread, and you'll learn possibly more that you want about this subject.

Michael Bradtke , Feb 08, 2013; 04:59 p.m.

You tested them and they are spot on... But you need to fine tune them?

Forget about it. Go out and make images and don't worry.

Walter Degroot , Feb 08, 2013; 06:42 p.m.

did you mean :" fidilly focus:"

this a step beyond one example of a lens being better than another.

mayvbe the problem is not the lens.
maybe it is your grip on the camera.

Dave Wilson , Feb 08, 2013; 07:02 p.m.

When it comes to stuff like this, my usual order of business is only to run tests after I have found an actual reproduceable type problem during regular shooting. I couldn't imagine sitting around testing all the focus of my lenses and focus points. i don't even know how many focus points my cameras have. I just pick the one I want and use it. Go make pictures and enjoy your cameras and don't worry about this stuff unless the need arises. Just my 2 cents.

Mike R , Feb 08, 2013; 09:33 p.m.

Thanks for all your responses. I was mainly just curious how others go about testing the focus of their lenses, whether the camera really needs adjusted or not.

Stephen Worth , Feb 08, 2013; 10:07 p.m.

I test the focus of my lenses by shooting photographs.

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