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Forums > Back > Parfocal lenses
genotypewriter
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#1
02-28-2011, 06:06 AM
I'm asking this to promote discussion as much as to learn... Can anyone please explain what changes are necessary to make an ordinary (varifocal) zoom a [url="http://en.wikipedia.org/wiki/Parfocal_lens"]parfocal[/url] zoom? Is it an addition of extra elements or can it be done through a more complex movement of existing elements?



Thanks,

GTW
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Messages In This Thread
Parfocal lenses - by genotypewriter - 02-28-2011, 06:06 AM
Parfocal lenses - by PuxaVida - 02-28-2011, 01:14 PM
Parfocal lenses - by genotypewriter - 03-01-2011, 01:11 AM
Parfocal lenses - by wim - 03-04-2011, 09:42 AM
Parfocal lenses - by genotypewriter - 03-09-2011, 12:20 AM
Parfocal lenses - by wim - 03-16-2011, 09:59 AM

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