TAKO. INTERNET SEIT 1996.
Olympus-OM

Re: [OM] Slide projector advice

Subject: Re: [OM] Slide projector advice
From: Richard Schaetzl <Richard.Schaetzl@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 28 Nov 2000 15:55:09 +0100
Winsor Crosby schrieb:
> 
> >Okay group, I need some advice about choosing the right slide projector
> >to do justice to my images taken with Olympus/Zuiko gear. What I'm
> >looking for is an affordable unit, affordable like toyota vs mercedes.
> >Remote control, auto-focus not a nessecity.
> >
> >Here are my questions:
> >Projector manufacturer?
> >I'm leaning toward Kodak or Kinderman, Leica being too pricey.
> >
> >Lens Type?
> >Fixed length or zoom?
> >>From my research zooms seem to be poorer performers.
> >
> >What focal length?
> >I would be viewing images from about 12-18 feet away.
> >
> >Lens Manufacturer?
> >My research seems to indicate that I should stay away from Kodak lenses.
> >What about Buhl, Schnieder or Rollei?
> >
> >Suggestions, comments, opinions or any other advice is welcome.
> >
> >Charles Packard
> >Jest thankful to be alive, healthy and not in trouble with the gummit.
> 
> I have a Leitz projector with ColorPlan 90 mm lens which is a nice
> length for a decent sized living room.  I bought it when I still had
> a Leica and I saw slides stunningly projected at a Leica seminar to
> about 10 x 15 feet on a very flat matte screen with Leitz projector
> and lens.
> 
> I have projected my slides side by side with a friend on a 60 x 60
> inch window shade type matte screen in a large living room with a
> Kodak projector with a Kodak lens with no significant difference in
> the projected images between the two projectors.
> 
> What is really significant is how well the feed works,

General rule of thumb, don't mix different slide frames, in straight
trays always use "full size" frames to avoid jaming (3mm in DIN trays,
for thiner frames use LKM or compact trays of the manufactor).

80 slide Kodak trays are not that prone of jaming, but the focus will
be held better by using only one type of slide frames.

> I know you said autofocus was not
> important to you, but it is to your audience.

Best is to use glass frames of an good manufactor like Gepe, no
refocusing needed, the slides are sharp from center to corner.

One wastes image quality by using glassless slide frames. Anti newton
etching is neccesary for most films, but unfortunatly reduces
contrast. Wess frames are better than Gepe ones in this respect, but
cost double the price. Little bit better than double glass frames are
that with only one glass, the emulsion side of the frame is not
protected by glass.

An alternative might be glasless frames which hold the slide on both
side of the perforation, available from Bonum and Wess. 
Contrast is better than with glas, but the slides are not held as flat
(still much better than ordinary glassless frames).


> One of the reasons I bought the Leitz was that in a Popular
> Photography article at the time they measured the film gate
> temperatures of a bunch of projectors and the temp in the Leitz was
> the lowest. 
...
> That becomes another argument for autofocus which is
> generally faster than manual focus.

Slides which don't get to hot tend to stay more flat, overheated
slides bend very much and might by damaged because the wraping might
be irrevesible.


> Unless you mount your slides in glass get a curved field lens because
> the slide becomes curved in the heat from the projection lamp.

Curved field lense are designed for slides held in cardboard frames. 

>  I
> have an innate prejudice against unreviewed  zoom lenses.  I think
> that the dogs out there far outnumber the really good lenses.

It's easy to identify the good zoom lenses, they tend to be 2-3 times
more expensive when new than a fixed projecting lens.

> Another consideration is the slide holder.  European projectors use
> European trays which work great, but are expensive as hell in the US.

In Europe it's quite the oposite.

> Because leaving a set up slide show in the tray is such a temptation
> because of the loading time, cost is a real consideration. Kodak also
> has a handy dandy little gadget that holds a box of slides without
> having to load them singly into a carousel.

Straight tray are that cheap in Europe, any other form of resonable
storage is much more expensive.

> it. I cannot remember exactly how much it cost to fix the autofocus
> on my Leitz once I finally found someone who could repair it and get
> the parts, but it was about half the cost of the projector ony 2
> years after I had bought it.

That technology is pretty simple, an repair shouldn't cost to much,
but then it depends if the repair technicans are used to service such
equipment.


Best regards

Richard



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