G-Claron vs. APO-Ronar

"Martin Jangowski" <martin DeleteThis @jangowski.de> wrote in message
news:d0hl4r$2p12$1@inside.p-i-n.com...
 > Charles Hohenstein <chohenste DeleteThis @skyenet.net> wrote:
  > > Are G-Clarons and APO-Ronars of about the same quality for copy work? I
  > > realize that many people also use them closer to infinity, but that is
  > > not my question.
 >
 > A Apo-Ronar has a usable angle of view of about 45deg, a G-Claron at
 > least 64 deg. I think its safe to say that the Apo-Ronar has less
distortion,
 > better correction and better MTF in the edges, after all it's easier to
 > made a lens with good correction when the usable angle of ilumination is
 > smaller.
 >
 > It surely depends on your application if this is UI for you. I doubt
 > that you will see any _real_ differences, espectially when used at
 > f22... both lenses will be diffraction limited.
 >

Schneider's 'equivalent' lens to Rodenstock's Apo-Ronar isn't really the
G-Claron - I suppose the Repro-Claron is more likely to be the equivalent?



Peter<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: G-Claron vs. APO-Ronar 

Bandicoot <"insert_handle_here"@techemail.com> wrote:

 > Schneider's 'equivalent' lens to Rodenstock's Apo-Ronar isn't really the
 > G-Claron - I suppose the Repro-Claron is more likely to be the equivalent?


Yes, the Repro-Claron is an equivalent to the Apo-Ronar... four lens
dialyte type. The G-Claron is a wide angle repro lens for smaller repro
cameras. I just got the lenses from a repro camera... 9/150 G-Claron,
9/300 G-Claron, 9/360 Apo-Ronar. It appears that these were both used
depending on requirement and not depending on quality.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: G-Claron vs. APO-Ronar 

"Martin Jangowski" <martin RemoveThis @jangowski.de> wrote in message
news:d0htbu$2vj0$1@inside.p-i-n.com...
 > Bandicoot <"insert_handle_here"@techemail.com> wrote:
 >
  >> Schneider's 'equivalent' lens to Rodenstock's Apo-Ronar
  >> isn't really the
  >> G-Claron - I suppose the Repro-Claron is more likely to
  >> be the equivalent?
 >
 >
 > Yes, the Repro-Claron is an equivalent to the Apo-Ronar...
 > four lens
 > dialyte type. The G-Claron is a wide angle repro lens for
 > smaller repro
 > cameras. I just got the lenses from a repro camera...
 > 9/150 G-Claron,
 > 9/300 G-Claron, 9/360 Apo-Ronar. It appears that these
 > were both used
 > depending on requirement and not depending on quality.
 >
Lenses like the Apo-Ronar and Apochromatic Artar were
originally designed for making photo-mechanical plates for
letter press printing. The wide angle process lenses were
used for making large photo-offset plates. The requirments
for the former were rather tighter.
The Dialyte has quite limited coverage but the image
circle at 1:1 is double that at infinity so a, lets say, 8"
lens will have plenty of coverage for even 8x10.


--
---
Richard Knoppow
Los Angeles, CA, USA
dickburk RemoveThis @ix.netcom.com<!-- ~MESSAGE_AFTER~ -->
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