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Old October 15th, 2007, 04:35 AM   #31
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maybe I've solved the lens aberration!
I've seen that the problem is the spherical aberration of the lens
to solve that we have to use another type of condenser
the aspherical pcx lens
for standard adapter the image is so small that a normal pcx is enough :-)
here is the link from anchor optic
http://www.anchoroptics.com/catalog/...34&s=type&d=a#

note that not all the size have the aspherical type
AX20566 73.5 52 PCX 1 ASPHERIC $11.50
maybe that work

also these link :
http://www.alignoptics.com/aspheric-...er-lenses.html
http://www.edmundoptics.com/onlineca...productID=2454

look at the picture and also this link:
http://www.jenoptik.com/cps/rde/xchg...s.xsl/4029.htm

p.s. I also haven't found big and cheap acromat lens :-(
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Last edited by Matteo Pozzi; October 15th, 2007 at 05:10 AM.
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Old October 16th, 2007, 04:21 PM   #32
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Recently I purchased a pair
PRECISION PCX ASPHERIC LENS 65MM DIA, 53MM FL from Surplus
There indeed are no questions about CA.
But very strong barrel, if to use only one.
And if to use both [)l(] or (]l[), nothing is visible :(
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Old October 17th, 2007, 06:44 AM   #33
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.... :-(
and using the 120fl pcx
color aberretion is the same or less!?
Mamiya 645/80/2.8 => 63mm => wax GG => 12mm => PCX Lens D70/FL120 [)=> +-120mm => HV20
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Old October 17th, 2007, 05:06 PM   #34
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I have D75/FL120 and D76/FL130.
Yes, CA is less, but yet noticeable.
Also there is substantial vignette.
I search a compromise between vignette, CA and barrel distortion now.
Maybe like this:
Mamiya 645/80/2.8 => 63mm => wax GG => 7mm => PCX Lens D70/FL67 [)=> +-100mm => HV20
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Old October 18th, 2007, 03:17 PM   #35
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Looks not beautifully, but it is a project version
Attached Thumbnails
medium lens adapter-adapter1.jpg   medium lens adapter-adapter2.jpg  

medium lens adapter-adapter3.jpg  
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Old October 18th, 2007, 05:30 PM   #36
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:-) looks good!

I've ordered this lens ...I'll tell you if it works
http://www.surplusshed.com/pages/item/l3788.html
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Old February 27th, 2008, 10:19 AM   #37
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Just did amateur video for my friend. Taken off as early as September. It have not any aesthetic value. Only demonstrates possibilities of my old static adapter
Mamiya 80 f2.8 => gg => PCX => hv20
http://www.artmaster.kiev.ua/media/HV20_final.mov
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