BetterPhoto Q&A
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Photography Question 

Jen Orbistondo
 

One Eye Sharp, One Eye Not


 
 
I'm using a 50mm 1.8 lens and have been getting a lot of great photos with one problem. One eye is in focus, the other is not. Most of my aperture's are wide open (f1.8 or f2) and I'm using natural light. I understand the DOF is not going to be able to have both eyes in focus at 1.8, but I'm not sure what to do about it as I'm trying to use available light. Thanks in advance!


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August 01, 2007

 

Todd Bennett
  Jennifer,

I think you've answered your own question. F1.8 or F2 is not going to give you the depth of field you need. All it takes is the camera at just the smallest of angles to create this problem. You've got to up something. Since you want to use natural light, that only leaves two things. Either the F stop, or the ISO. I shoot the D70S and going to ISO 400 is not a problem. Very little noise if any. Going to ISO 400 would allow you to use a better F stop for depth of field without the worry of a long exposure.

The only other thing I can think of would be to bring in a reflector to help add more light or balance the light which might allow you a higher F stop.


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August 01, 2007

 

Alan N. Marcus
  Hi Jennifer,

Likely the f/1.8 50mm will have enough depth-of-field to carry through and render both eyes sharp and clear. The problem here is the point focused upon. You are simply focused on a point in space forward (towards the camera) of the subject. My guess is, this is just a case of bad luck. In future you are advised to curb your urge to compose so tightly on camera. If you would just step back a foot or so your depth-of-field problem is solved. Keep in mind that one of the joys of digital photography is the ability to crop using an image editing program. Stated another way: The span of the depth-of-field zone expands with increased camera to subject distance. Crop for effect after the fact.

Alan Marcus (caution marginal technical advice.
ammarcus@earthlink.net


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August 01, 2007

 

Jen Orbistondo
  Thanks guys, advice taken. I'll try again tomorrow!


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August 01, 2007

 
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