50mm nikon lens "back focusing"

Shane

Shane

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Shane
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Hi,
Can anyone explain why a lens would "back focus"? the lens worked fine on my D40x but seems to back focus on a D200.
 
Shane said:
Hi,
Can anyone explain why a lens would "back focus"? the lens worked fine on my D40x but seems to back focus on a D200.
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Not saying it's not a problem but to many people feel AF should be perfect 100% of the time.

It's not. There can be many reasons for the focus to be out.


Saw this elsewhere on t'web

This is my take... You point camera at object to be photographed.
Red light blinks in lens viewfinder on object to be photographed.
Press shutter and chimp at said masterpiece
Down load said photo to PS and find object is not in focus .
A: scream bloody murder and blame lens ,camera or dog if he happens to be near by.
B: unload camera on FM ,ebay and upgrade.
C: do what I do and resign yourself to ;I suck at photography but at least I can blame alcohol consumption for my focus issues.
Its my nearsightedness to blame.
Or just say my camera back focuses and defer all blame to the manufacturing process. Which comes full circle back to alcohol consumption, since the camera was built on a friday or a monday or just prior/post to a long weekend
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A screwdriven lens cannot backfocus, so the problem is your D200.

Send it to Nikon and ask for a "body depth check and AF adjust".
 
puddleduck said:
A screwdriven lens cannot backfocus, so the problem is your D200.

Send it to Nikon and ask for a "body depth check and AF adjust".
Click to expand...

OKay thanks, can anyone confirm this?

I'm told that the D200 focus' okay with a 70-200, but the 50mm at f/2.5 will back focus.
 
If you're talking about the 50 f1.8, then I have to say that mine is perfect on my D200 .. so too is my 70-200VR!
 
I really can't tell you if it does, or doesn't! Afterall, a lens made by mortals is bound to get a few lemmons once in a while.

Do a test to double check, if still in doubt then either return it or have it inspected.
 
Have you got / can you borrow another lens and check that. If not, pop into your local Jessops and select a lens you want to consider "buying" Take a few shots then rush back home and look at the results.
Or, take the lot into a good camera shop and get them to have a look, ( you could say you are thinking of buying a new lens and want to check the performance or just come clean) most will be only too happy to stick another lens on and check it for you.
Allan
 
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