Re: Sharper Copy Lens for Crown Graphic???????

"Dr. Slick" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> My artwork Sizes range from 8.5"x11" to about 4'x3'.
> I usually end up about 0.8-1.8 meters away or so.  Right
now, I am
> using a 135mm/4.7 xenar, and under a loupe, the results
seem like they
> could be
> a bit sharper.
>
>
>
> Then [EMAIL PROTECTED] (Thor Lancelot Simon) wrote in message
news:<[EMAIL PROTECTED]>...
> >
> > Tessars aren't generally considered particularly good
lenses for copy work;
> > they are almost always optimized for infinity and their
corrections depend
> > on the subject distance.  A better choice would be a
lens actually meant
> > for copy or tabletop work, such as an Artar, Apo-Ronar,
or G-Claron.
>
>
>     And someone else also mentioned the APO-Ronar.
>
>     And, Stacey mentioned this:
>
>
> "Again like I posted in another thread, look around for a
127mm
> tominon. They
> are pretty cheap and were designed for the type of work
you are doing.
>
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2963509709&category=30076
>
> Bet this one goes for under $100 and this is they type you
want,
> already
> mounted in a shutter."
>
>
>
>     So i guess i could try either the 127mm Tominon or the
APO-Ronar.
>
>     What do you folks think?
>
>
> Slick

  An Apo Ronar would work fine. I have no idea what the
Tominon is.
  If you can rig a front or rear shutter a good enlarging
lens is ideal for this kind of work. Its often not too
difficult to makeshift a mount for getting a barrel mount
lens to mount on the front of an old shutter.
  The lens on the camera has been optimized for infinity and
may not be the sharpest lens to begin with. Enlarger lenses
are optimized for the distances most often used for the
format. Lenses for 4x5 are usually optimized for a
magnification of around 3 times those for 35mm for about ten
times. The range is pretty great so its not critical. Modern
enlarger lenses are very well corrected so will be as sharp
as any other lens you can use for the application.


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Richard Knoppow
Los Angeles, CA, USA
[EMAIL PROTECTED]