I have been toying with the idea of using a simple 35mm. slide projector to provide the light source for an 8X10 enlarger. I have two 50mm. f2.8 Navitar that I use in my Ektagraphics to project huge images with very short projector to screen distances. I think that this lens may have been originally designed for rear projection because of the low f stop.
Just make a housing of some sort to position the projector and make some kind of sliding shutter in front of the lens to make the exposures. This way the projector can be left on constantly to avoid light fluctuations. The light should be pretty intense and evenly distributed Kodak projectors even come with a convenient fan to keep the light source cool, there is usually a heat proof glass filter to keep the projected light cool and you don't have to worry about really big condensers. You can pick up old slide projectors of all kinds at garage sales for like $35 or so. You could use some opal colored glass from a glass shop or try some kind of translucent plastic from a commercial 2X4 foot ceiling fluorescent fixture. I'm making room in my garage right now to try this experiment. Let me know if anyone beats me to it and can make it work. Ron Levandoski, DMD. > From: [EMAIL PROTECTED] > Reply-To: [EMAIL PROTECTED] > Date: Sun, 2 Dec 2001 12:07:10 -0700 > To: [EMAIL PROTECTED] > Subject: Cameramakers digest, Vol 1 #272 - 5 msgs > > Message: 1 > Date: Sat, 01 Dec 2001 18:57:55 -0500 > From: "Philip J. McCourt" <[EMAIL PROTECTED]> > To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > Subject: [Cameramakers] 8x10 enlarger > Reply-To: [EMAIL PROTECTED] > > Hello Everyone, > I have been building a 8x10 enlarger to go along with my 8x10 camera. I > made the negative holder with two pieces of 1/4" glass. The glass slides > into a holder that replaces the back of my camera. > > The light box I made out of 1/4" plywood, which houses 12 light sockets. > I set up the camera and light box with 60 watt light bulbs just to see > the image that it would project. > > My problem is what to use to defuse the light striking the negative. I > have been trying to keep the cost of making this enlarger to a bare > minimum. I may have to add 4 more bulbs to the light box to keep the > light as even as possible in order to avoid hot spots on the projected > image. I have entertained the idea of using a piece of ground glass as > a light defusing device. > > Does anyone have any ideas on what to use that won't cost a fortune. > Phil McCourt > _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
