[rollei_list] Re: slide shows alive and well in Europe
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Fri, 06 Oct 2006 18:56:00 -0700
Larry,
Careful with that Aero Ektar lens! It was never designed to withstand
heat. Cold, yes. Does it still have that brownish color due to the
effects of the rare element glass?
Jerry
Laurence Cuffe wrote:
>
> On Friday, October 06, 2006, at 03:48PM, Eric Goldstein <egoldste@xxxxxxxxx>
> wrote:
>
> >If you think about it, any enlarging lens that is long enough to give
> >you the magnification you need will certainly cover...
> >
> >Eric Goldstein
>
> Getting the coverage wouldn't be a problem, getting the speed/brightness
> probably would be. Most long focal length enlarging or process lenses I've
> found all have quite small F stops. When I get back to Ireland I should try
> out my aero Ektar on the magic lantern and see how it does.
> I'm not that convinced by digital/powerpoint. I remember one talk I gave
> where I had a load of beautiful electron micrographs which I scanned and the
> put in a powerpoint presentation. After putting about five of them up on the
> screen in the talk, I apologized to my audience and skipped the rest, the
> displayed quality was just so poor.
> I ended up passing around the 8x10 prints I'd made to scan the images from,
> which worked out o.k. Admittedly, part of the problem is cultural, we expect
> the lights to be very dim for a slide presentation while for power point
> presentations the expectation seems to be for much higher ambient light
> levels.
>
> Thanks for the suggestions,
> All the best
> Larry
>
> >
> >On 10/6/06, David Dodge <dannysoar@xxxxxxx> wrote:
> >> I'd have thought that the important number would be the coverage. I
> >> can't imagine that 6x9 enlarging lenses are hard to find. I have a
> >> friend who regularly enlarges 5x7's on an old 8x10 Saltzman (sp?)
> >> enlarger.
> >> David
> >>
> >>
> >> Eric Goldstein wrote:
> >>
> >> > You could use an enlarging lens if you could find one long enough. You
> >> > need a lot of magnification in projection. Typical speed of a
> >> > projection lens if f/2.8 - f/3.5 (for zooms), which is in the ballpark
> >> > for enlarging lenses. Getting a pright projected image from a
> >> > transparency is always a challange.
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