Archived posting to the Leica Users Group, 1998/06/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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