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Anyone use face detection?


Ivan Muller

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I have been trying out the face detection mode with my viefinder for close up portraits and I am quite happy with the results. I know 'gimmicks' like this are considdered beneath competent photographers but I though I would give it a try!

 

The central focus mark becomes too much of a guestimate on anything other than flat walls or more distant subjects. Close-up portraits, unless subject head is in the centre of the viefinder is also difficult.

 

I took this image against a plain side window lit wall. For this one I used f2.8 and focus is sharp on the mouth but ever so slightly out on the eyes, At f4 and f5.6 mouth and eyes are in focus and pin sharp, with pleasing out of focus areas towards back of head and torso.

 

Focussing speed is a bit slow but accurate. Exposure was spot on but I increased the contrast and blacks a bit for effect.

 

I have set one of my profiles for face detection so can switch modes fairly quickly but still a bit of a pain to go to the menu.

 

Of course viewing matters with the screen will probably be easier but I find that optical viewfinder use is brighter and I can hold the camera steadier. Parrallax is still a bit of a guestimate....But the enclosed pic is uncropped and the top framing was where I wanted it to be.

 

So in the end I am quite hapy with another 'work around the performance issues of the X1' method. I wish my 5d had face detect focussing.....

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Enclosed a vertical portrait before I had the viewfinder. I had just got the camera and used the face detect before I knew how to move the central focus point.....which is quite cumbersome in any case.

 

I printed this pic of my daughter up to size A0, and although its a bit soft if you look closely, at normal viewing distances it looks superb!

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I used face detection for about the first week and then switched to spot focus. When shooting indoors at f2.8, I found that while face detection would focus on the face, it wasn't necessarily on the eyes. I always try to spot focus on the eyes and then shift the camera. At higher f stops in good light, face detection works fine.

 

5344648031_6ce1a5cf7a.jpg

The eyes have it by ffacker, on Flickr

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Hi All,

 

I have used it on the few occasions when I have wanted to take self portraits holding the camera where the spot focus becomes difficult to control. In all other circumstances I use centre point spot focus mode or manual and reframe for off centre subjects.

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Edward, Ivan -- can you guys explain what you mean by the parralax being a problem with the viewfinder? I'm not sure I understand.

 

In the most general terms - the difference between what an accessory viewfinder (in the hotshoe) sees and what the lens sees. If you use the frame-lines in the Leica X1 viewfinder mounted on the hotshoe you will be relatively safe - but as you move closer to the subject the difference becomes more pronounced between what you see as opposed to what is recorded, you will need to adjust for that.

 

The rear display on the X1 used as the viewfinder sees pretty much what the lens sees....

 

Cheers, Terry.

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Ahhhh, got it. If you purchase one of the old adjustable viewfinders that were made for 35mm, 50mm, 90mm, you can leave the frame lines set for 35mm and adjust the tilt lever on the base to correct the parralax, so that the framing matches up with the LCD at your preferred distance.

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Hi NZDavid,

 

Actually my tests so far has given me excellent results using the face recognition and the optical viewfinder when I am doing static portraits of a single person/face . Only drawback is that the focus is a little slow, and of course one doesnt know or have a visual confirmation that it did actually focus on the face. When using f4, on very closeups eyes are in focus as well but back of head is out of focus. Gimmicky or not it works for me and works very well with the optical viewfinder and so far not one out of focus image...

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