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05-13-2008, 02:30 AM   #1
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MTF

Hi All,
I am a newcomer. I've searched as best I can but cannot find this. What does MTF stand for and what are the advantages of using it?
I shoot for stereo images and mainly use TV or P.

Jay

05-13-2008, 06:25 AM   #2
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Modulation Transfer Function. It's complicated, but the easiest way to think of it is just as sharpness and contrast.

For a full explanaion, see here: MTF
05-13-2008, 06:38 AM   #3
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That might be what it stands for but the feature is this. Each lens has a chip inside and one of the things programed there is the designers selection of the best focal length and f stop combination (zooms) and with a prime the best aperture for that lens to achieve maximum sharpness/contrast. It sends the data to the camera body if that feature is enabled to get the best results.

The issue is that resolution and contrast go hand in hand but too much of one hurts the other. Too much contrast kills resolution and vice versa. So the designers program in the spot where the 2 are as close to the best as possible.
05-13-2008, 06:42 AM   #4
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Heh. Just realized that I hadn't mentioned anything about the MTF program line. But you beat me to it.

To the OP: What are stereo images?

05-13-2008, 06:51 AM   #5
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stereo images are images taken next to each other, with a slight bit of adjustment in the angle of one position, so that using the 'magic eye' technique, you can blend the images into one, and see a "3d" version of it
05-13-2008, 10:52 AM   #6
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QuoteOriginally posted by joefru Quote
. . . What are stereo images?
This is basically the image you would end up with and then, using a 3d image viewer, the image appears multi-dimensional. Sometimes you can 'fake' the viewer by putting something at the picture center junction (e.g., an envelope) and moving your head position fore-aft while un-focusing your eyes to get the 3D affect. Works best for a smaller size picture.
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05-13-2008, 12:55 PM   #7
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A 3D image viewer? You mean like a ViewMaster?
05-13-2008, 01:21 PM   #8
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QuoteOriginally posted by joefru Quote
A 3D image viewer? You mean like a ViewMaster?

Here is a link for an explanation of the old stero film cameras used to make 3D images.

Dave

Stereo camera - Wikipedia, the free encyclopedia

05-14-2008, 05:13 AM   #9
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QuoteOriginally posted by joefru Quote
A 3D image viewer? You mean like a ViewMaster?
Here's an example and how it's done with a point-n-shoot Pentax S4i (as used in the photo above). Read pages 57-59.

http://www.pentaximaging.com/files/manual/OptioS4i%20%20Web%20.pdf
05-14-2008, 09:56 AM   #10
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QuoteOriginally posted by jlp Quote
Here's an example and how it's done with a point-n-shoot Pentax S4i (as used in the photo above). Read pages 57-59.

http://www.pentaximaging.com/files/manual/OptioS4i%20%20Web%20.pdf
So I was right? That looks just like a ViewMaster.
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