[alt-photo] Re: a large-format horizontal enlarger with tilt shift mechanism?

[Gordon J. Holtslander]

My fathers first enlarger was a modified medium format camera.

If you are interested in making an enlarger device with shifts and 
tilts, why not start with a view camera and modify it?  Maybe its only 
necessary to modify a film holder and add something to hold a flash bubl 
in place and contain the light it emits to the "enlarger"


What size negatives are you working with?

Gord

On 11/28/2010 4:51 PM, Ryuji Suzuki wrote:
> Hi,
>
> I'm trying to make a projector for a very large screen. I
> thought about modifying a slide projector or an overhead
> projector, as there are many in used market very
> inexpensively, but I realized that the same is true for
> enlargers, and I have several 150mm, 180mm and 210mm Componon
> and EL-Nikkor in my storage (anyone wants to buy some?). I
> think the advantage of an enlarger is easy access to replace
> the light source. I intend to use a xenon discharge flash. The
> projector is used to expose still photographic images and the
> source needs not be continuous light.
>
> Since I want the image to be rectangle, but there may not be
> perfect flexibility in placing the enlarger in relation to the
> fixed screen. I wonder if any enlarger has shift capability (I
> think most have tilt capability).
>
> If I can find a horizontal 8x10 or 5x7 enlarger inexpensively,
> I may use that, but otherwise, I plan to modify my Durst
> Laborator 138.
>
> Now, my flash tubes (boty Elinchrom and Dynalite heads I have)
> come with a 140 degree reflector. One question is whether this
> works well with the condenser system. Another possibility is
> to use a bare bulb tube, which is more like a point source,
> but considerably bigger in size than the halogen filament
> bulbs used in point source heads, and the glass is clear not
> opal unlike regular enlarger bulbs.  (I want the projected
> image to be reasonably uniform.)
>
> Another question is printing the film to project. I intend to
> prepare the image "film" by printing 5x7 transparencies with
> inkjet printer, as that's the size of my enlarger unit. I
> don't intend to print anything larger, so prefer small printer
> that's low maintenance. What would be a good printer and film
> for this purpose? I think the discussion I saw on this list
> are more concerned about printers capable of A3 or larger, but
> I do not want a big device. The image will be enlarged 5x to
> 20x, and probably onto a rear projection screen.
>
> Incidentally, overhead projectors tend to use fresnel lens
> rather than convex lens in condenser, and I don't like to see
> those concentric lines, so that's another reason for enlarger
> or possibly slide projector. But making 35mm slides from JPEG
> is PITA, so perhaps LF enlarger is the best option for me.
>
> --
> Ryuji Suzuki
> "Don't play what's there, play what's not there." (Miles Davis)
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>


-- 
Gordon J. Holtslander
gjh at shaw.ca