Re: How do you test if camera lenses match?

[P3D John Ohrt <johrt@xxxxxxx>]

P3D Dr. George A. Themelis wrote:
> If I was going to test lenses for FL match I would take two slides and
> mount them in an Albion mount.  By aligning the bottom of the images
> I can see how well they match at the top by using the aluminum mask
> as my reference.
> 
> Now, that it simple!


I don't follow you here.  I think you are assuming hardware which I
would consider exotic.  eg I don't know anyone in Regina interested in
3d much less actually actually owning hardware.

I've been in digital imaging most of my life( graduated 1968), 
therefore I consider scanning routine :-)

But I did mention using a micrometer (typically 0.1% accuracy).

Centroiding is overkill, but I'm sceptical of 1% being satisfactory. 
For certain uses maybe it is.  I bow to experience.

In my world better than 0.001% is more like it :-)


Is 1% a rule of thumb?

Regards,
John
--
John Ohrt,  Regina, SK, Canada
johrt@xxxxxxx



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