Bryant:
Decades ago, I used to shoot almost nothing but slide film simply because of their clarity, tonal range, detail, luminosity, sharpness, etc. Some time ago, I began to shoot print film and have recently decided to go back to using slide film, because print film simply cannot compare, especially at great enlargements - a projection of a slide onto a 50 X 50 inch screen for example.
Decades ago, I was able to attend two 2-day Leica Photographic Seminars - one in Peoria, IL - sponsored by the camera shop that I was then working at and the second at Southern Illinois University in Carbondale, IL. At both seminars 35mm slides were projected - using Leica projectors, of course - onto an 8 X 12 FOOT screen - a 96 times enlargement from the 1 X 1.5 inch slide. The projected slides were clear, sharp with extraordinary detail. show great luminosity and color separation, etc., etc., etc.
I project my slides on an (now old) Pradovit Color 150 projector onto a 50 X 50 Matte White Screen.
Some (hopefully) useful information:
1. 35mm slides have a thinner emulsion which accounts for a number of things, namely the ability to transmit finer detail, sharpness, luminosity, & color separation at greater enlargements than print film.
However, these factors are dependent upon a number of other factors:
1. While a Silver Lenticular screen produces a bright image with a wide reflectance angle, the surface actually breaks up the image so that the surface can become interruptive of your viewing enjoyment. A glass beaded screen will also produce a bright image, but with a narrower angle of reflectance when compared to a Silver Lenticular screen.
For that reason, I sent back my Da Lite screen (Silver Lenticular) and had them replace the surface with a Matte White screen, which gives slightly less brightness when compared to the other surfaces, but - because of its flat surface - gives a highly detailed image with a broad angle of reflectance.
2. With the exception of the Leitz projector, all other projectors, i.e. Sawer's, Bell & Howell Cube, & the Kodak Carousel will project a slight to a significantly orangish light on the screen and there will be a significant loss of image brightness and clarity at the edges - this is particularly true of the Sawyer's and Bell & Howell Cube projectors and noticeably true with the Kodak Carousel.
The Leitz projectors project a very nice bright white light which is clear out to the edges of the frame. They also have an extraordinary cooling system, which will not damage slides even over the long haul. My Pradovit Color 150 (watts) will project brighter (and clearer, even in the shadow areas) images than the any of the above mentioned slide projectors even though some of them had 500 watt projection lamps compared to my 150 watts.
Older Leitz projectors, such as Pradovit Color 150 (watts) and the Pradovit Color 250 (watts) - both with 90mm Colorplan lenses - are still often offered at reasonable prices on
Ebay. The 90mm Colorplan projection lens will give you a moderate projection distance between the 50 X 50 inch screen and the projector; so you might also wish to consider the 120mm Leitz projection lens. You can also find newer models as well.
3. Of course, all of this is for naught, if you don't have consistency of exposure, accuracy of focusing; minimalization of camera movement (shake); and, above all, an good eye for composition, i.e. aesthetics.
In addition, I would be certain to forward slides for processing to a very reputable company to insure that your efforts are well rewarded with their high standards. For example, the older of my two younger sister sent her Super 8 movie film to all sorts of places in order to obtain cheaper processing. Her movies of her children consequently suffered - mostly off color. In short, why spend time, effort, and money attempting to produce excellent images only to have them greatly diminished by poor processing standards. Or projection standards, for that matter.
4. As for slide film, decades ago, I excusively used Kodachrome II; Kodachrome 25 and occassionally Kodachrome 64. I did so because Leitz lenses reach their optimal performance either at wide open or a few stops down from being wide open. So I had absolutely no problem in obtaining sharp images at either wide open or at 2 or more stops down.
I've experimented with Fuji and Agfa, both of which had their small advantages (decades) ago, but I found that the dyes used in these other slide films were not stable.
These days, I probably switch to mainly using Kodachrome 64 and/or Kodachrome 64 professional (when the need or project demands) and
may again experiment with Fuji slide film sometime in the near future.
Hope this general discussion is useful.
Bill