Re: How do you test if camera lenses match?

[P3D sid herbage <sid@xxxxxxxxxx>]

P3D Grant Campos wrote:

> Would it be sufficient to take them out into the sun and compare their
> infinity focus (see how far from the off white paper each one is when
> it starts to burn the paper).  Then if their infinity focus distance
> is within 1 % (0.1 %?) can I use them to make a stereo camera?

If the lenses are (say) 40 mm focal length, then 1% difference
in focus represents a distance of about 0.015". Could you, in
fact, measure this accurately with a relatively simple setup?

-- 
    ... Sid (sid@xxxxxxxxxx)


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