50mm 1.8 focus problem

[JacoMedia0113]

Whenever I focus automatically with the viewfinder, it doesnt actually focus where it says it will. For example, I tested this out with a roof and focused on the chimney and saw the red flashes indicating where the camera is focusing. It also looked perfectly in focus in the veiwfinder. When I took the shot and saw where the focus point was, it was about 10 feet closer to me than the chimney. Then I went to the lcd screen and focused the same way on the chimney and it focused perfectly. I tried this on other lenses and its only the canon 50 1.8. Its really not that expensive so I might get a new one or if you recommend a better 50mm lens. I use a canon 6d btw if that helps. Thanks.

[ebiggs1]

Robert,

"AFMA apparently did fix the OP's problem."  

Yes, I know that is why I stated, "Whether it is the OP's problem or not, I still think it not likely an AFMA issue."

The reply was in response to your thought that 10 feet is a doable correction for AFMA.  I think it is out of the reach of AFMA to the point of being certain that it is.

[RobertTheFat]

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@ebiggs1 wrote:

Robert,

"AFMA apparently did fix the OP's problem."  

Yes, I know that is why I stated, "Whether it is the OP's problem or not, I still think it not likely an AFMA issue."

The reply was in response to your thought that 10 feet is a doable correction for AFMA.  I think it is out of the reach of AFMA to the point of being certain that it is.

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Suit yourself, Ernie. But as they say in the legal profession, "Rēs ipsae loquitur."

[ebiggs1]

I am not an attorney so I have no idea what that means or even how to pronounce it.  I am a photographer and still think 10 feet is not possible. But you certainly have my permission to try.

[Waddizzle]

Take a look at what the DOF table says about a 50mm with a 5D at a distance of 20 feet.

http://www.dofmaster.com/doftable.html

[kvbarkley]

Generally you are much further than 20 ft away from a chimney!

[Waddizzle]

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@kvbarkley wrote:

Generally you are much further than 20 ft away from a chimney!

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Exactly, and look at what happens to the DOF.  It can get pretty deep, fairly quickly.  Af f/8, the hyperfocal distance is 54 feet.  Making AFMA adjustments when DOF is that wide can move it several feet.  So, perhaps 10 feet isn't as far fetched, after all.

Without knowing the distance to the chimney, aperture setting, or sample photos, most of the discussion is conjecture.

[ebiggs1]

"So, perhaps 10 feet isn't as far fetched, after all."

Yes it is.  Please be my guest and give it a go.

[JacoMedia0113]

Thank you so much robert for your advice on where to go, im going tomorrow kind of last minute and you helped fill in some time. Ill be sure to check those places out. Thanks so much again.

[JacoMedia0113]

Yes kvbarkley, I was about 100-150 ft away

[JacoMedia0113]

Ok, everyone. After doing more research it is for sure doable to correct a 10 foot issue about 150 feet away. Its all about proportion. Usually AFMA's are done about 10 feet away with a max adjustment scale of a few inches but the further you get the more room for adjustment.