Re: matching camera lenses

[P3D Sam Smith <3dhacker@xxxxxxxxxxxxx>]

I might not have made the last post clear regarding matching the images from
two lenses, so I'll expand it a little.

Accurate lens testing in the store is almost impossible when it comes to
matching lenses. But you can try this:

1.  Bring a cheap roll of color film to the store with you.
2.  Load up the camera and set it up on a tripod to set a shot out the
window of a static scene.A thin object near end side, as in two telephone
posts, will give you a reference for alignment later on. 
3.  Bang off the roll with different lenses, making sure you can identfy
which lens took which frame, and make sure they are all focused at infinity.
4.   Have the film processed DEVELOP ONLY. 
5.   Cut each individual neg out at the borders. 
6.   Select two negatives you want to compare, and place one directly over
the over on a light box. Try to make the two images line up into one image.
The telephone posts should line up perfectly. If they do not, substitute one
of the other negs. If you find two that match up perfectly, you've got two
matched lenses.





The 3D Hacker
website: http://www.cadvision.com/3dhacker/index.htm




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