Archived posting to the Leica Users Group, 1998/06/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Vince, Thanks for the information. Like you, I have mostly the standard glassless plastic mounts and a few older Kodachromes. I bought the 600 projector yesterday, with the FF lens. The dealer has ordered the CF lens for me; this way I will try both, see what works best for me and return the other one. Nathan Lamberti, Vince SAL-ASO/1 wrote: > Nathan, > > I have a P300 projector with a Colorplan P2/CF and a Hektor FF lens (the > latter supplied as the standard lens with the P300). I only use > glassless slide mounts, plastic for E6 and cardboard for K'chromes. > > Neither lens will project a 'perfectly' flat image in every instance, > since different slides pop/curve at different rates. However, I clearly > prefer images (in terms of image flatness) projected with the Colorplan > CF lens. The instance a slide pops, the image snaps into focus. The > opposite occurs with the FF lens. It begins reasonably flat, and snaps > out of focus when the slide pops. (By focus, I mean focus in the image > corners). > > Leica states that the Colorplan CF lens has been designed to accomodate > the curvature of a slide in a cardboard mount. A slide in a cardboard > mount will generally curve more than a slide in a plastic mount, when > projected, since the film is glued in place between the two cardboard > layers. It is not able to expand when heated by the projector lamp. A > slide in a plastic mount is able to expand into the plastic mount, when > heated, resulting in less curvature. > > In brief, most of my slides curve when projected, and while they curve > at different rates, I much prefer the CF lens. > > Regards, > > Vince Lamberti