front focusing? HELP!!!


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rexlim

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Nov 3, 2004
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#1
Can anyone tell me if this is front focusing?
Camera setup: D200 w 50mm f/1.8 lens on tripod with focus locked on the letter "B"(center of pic).
Confirm "B" in focus as seem thru viewfinder!

1. Taken @f/1.8


2. Taken @ f/2.8


3. Taken @ f/4


4. Taken @ f/5.6


Seems like @f5.6, the letter "B" then comes into focus...
Can some1 enlighten...
 

gooseberry

Senior Member
Mar 11, 2004
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#2
This isn't a good test. The focus point sensor is much larger than the 'B' and I would think that it could easily have focused on any of the letters within the sensor area, but most probably the ones in front.

If you want to do a focus test, you can perhaps do a search for D70 focus test chart and you'll be able to find a site with a downloadable focus test chart
 

rexlim

New Member
Nov 3, 2004
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#3
This isn't a good test. The focus point sensor is much larger than the 'B' and I would think that it could easily have focused on any of the letters within the sensor area, but most probably the ones in front.

If you want to do a focus test, you can perhaps do a search for D70 focus test chart and you'll be able to find a site with a downloadable focus test chart
This is a cropped image already.
Focus point is directly on the letter "B" like this ==> [B]

I cropped it to show the image more obvious, else it'll be too small...
 

gooseberry

Senior Member
Mar 11, 2004
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#4
This is a cropped image already.
Focus point is directly on the letter "B" like this ==> [B]

I cropped it to show the image more obvious, else it'll be too small...
The letter "B" is already too small to be the only letter inside the focus point in the above images - if they are cropped images, then the "B" is even smaller.

Also, take note that the focus sensor area is larger than that indicated on the focus brackets in the viewfinder.
 

zac08

Senior Member
Feb 21, 2005
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#5
Btw, did you use closest subject focusing priority? If so, this may void this test
 

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