Re[2]: OT Sharpening for D-Lab 2 Prints

2004-12-02 Thread Alin Flaider
  
  Strange, I thought there is nothing to focus about lasers, after all
  those are in-phase, rectilinear beams with extremely low
  dispersion!? Could it be the so called focus procedure is rather an
  alignment process to insure the three laser spots overlap?

  Servus,  Alin

Butch wrote:

BB There is also the possibility that the focus on the d-lab is off a touch. I
BB never worked with a d-lab, but the frontiers have a routine that focuses the
BB 3 lasers, so I assume the same is true with the agfa. Try giving them a
BB negative you know is in sharp focus and see how the result comes out. It is
BB also possible that they don't realize that their machine has drifted out of
BB focus. That happened to me at Eckerds. My analog Fuji was a touch soft. I
BB didn't notice until a new customer brought in a  large order, complained
BB that it was soft, took a couple frame to be printed at a competitor and
BB brought them back. I then got to adjust focus on the machine without the
BB proper focus neg. Luckily I have a masters in seat of the pants.  :) It is
BB also possible that they keep their focus slightly soft to minimize dust
BB spots. An old pro lab I used to use did that.

BB Butch




Re[2]: OT Sharpening for D-Lab 2 Prints

2004-12-02 Thread Butch Black
Alin wrote:

Strange, I thought there is nothing to focus about lasers, after all
  those are in-phase, rectilinear beams with extremely low
  dispersion!? Could it be the so called focus procedure is rather an
  alignment process to insure the three laser spots overlap?

  Servus,  Alin

That is correct, though I believe they call it focus. You want all three
lasers at the same point or you get a kind of fringing effect similar to
what you described responding to Rob.

Butch