From: Carl Lee (email suppressed)
Date: Tue Oct 12 2010 - 18:30:31 PDT
Thanks, Chris! It's good to have some closure on this. :)
On 10/12/10 6:23 PM, Christopher Harris wrote:
> Hi Carl,
>
> If after all of this time you are still curious the answer is simple:
> the 38mm on the Elmo is NOT wider than the ISCO when it is zoomed all
> of the way out. I just thought it was and I also couldn't understand
> why this would be the case. As it turned out, I was informed later
> that the Eiki with the ISCO lens was actually broken and now that it
> is fixed the lens zooms correctly thus solving the mystery for me.
>
> CH
>
> > Date: Wed, 18 Aug 2010 14:25:56 -0400
> > From: email suppressed
> > To: email suppressed
> > Subject: Re: [Frameworks] projector question
> >
> > I'm curious -- why would the 38mm on the Elmo be wider than the ISCO
> > 35-65mm if it's zoomed out all the way?
> >
> > Carl
> >
> >
> >
> > David Tetzlaff wrote:
> > > On Aug 18, 2010, at 7:31 AM, Christopher Harris wrote:
> > >
> > >> Thanks Alain, I think you pretty much diagnosed the problem.
> > >
> > > It's not a problem. A 50mm is too long to get a decent image size in
> > > most classrooms and small auditoriums. Wider lenses for Elmo and Eiki
> > > are rare and expensive. You should be happy happy happy to have
> the 38mm.
> > >
> > > Still, there shouldn't be a dramatic difference between the
> brightness
> > > of the 38mm on the Elmo and the Eiki/ISCO zoomed out to the same
> image
> > > size. (You're also lucky to have that ISCO for your Eiki. Nice and
> > > bright compared to other options..._
> > >
> > > Are you sure the projectors both have 200W lamps?
> > >
> > > Does switching the lamps between the projectors make a difference?
> > > (It's possible the Elmo lamp could be weak, or something could be off
> > > with its DC power supply.)
> > >
> > > In any event, the 200W lamps for Eiki/Elmo are EJL, and you should
> > > lamp both of them up to a 250W ELC, which is the proper lamp anyway.
> > > Noticably brighter.
> > >
> > > (There are oddball low-end Eikis with 300W AC lamps, but those are
> > > dimmer than even the 200W DC ones, so I doubt you have one of
> those. I
> > > forget the model number difference, but you can recognize the AC lamp
> > > ones because they don't have a brightness switch inside the lamp
> housing.)
> > >
> > >
> > >>
> > >> CH
> > >>
> > >>
> ------------------------------------------------------------------------
> > >> Date: Tue, 17 Aug 2010 21:39:16 -0700
> > >> From: email suppressed>
> > >> To: email suppressed
> > >> <mailto:email suppressed>
> > >> Subject: Re: [Frameworks] projector question
> > >>
> > >>
> > >>
> > >> On Tue, Aug 17, 2010 at 8:54 PM, Christopher
> > >> Harris <email suppressed>> wrote:
> > >>
> > >> Hello all,
> > >>
> > >> I very recently bought an Elmo 16 CL DELUXE projector with a 38mm
> > >> lens and I noticed that compared to the Eiki owned by the
> > >> university where I teach the throw is much wider than the Eiki
> > >> with the ISCO 35-65 16MM zoom lens. Both projectors have 200W
> > >> bulbs so I suppose that the difference in brightness comes down
> > >> to the difference between the same lamp focused to a spotlight
> > >> versus flooded. Even with the Elmo switched to "high" brightness
> > >> its much dimmer than the Eiki.
> > >>
> > >> Any opinions? On or off list is fine by me.
> > >>
> > >>
> > >>
> > >>
> > >> The ISCO 35-65 is f1.3 while the Elmo 38mm (I believe) is f1.5. If
> > >> the image is wider on the Elmo and with the slight difference in
> > >> speed, you'll see a difference in brightness.
> > >>
> > >> Alain
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> _______________________________________________
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> > >>
> > >>
> > >>
> > >>
> > >> --
> > >> 40 FRAMES
> > >> Alain LeTourneau
> > >> Pam Minty
> > >>
> > >> 40 FRAMES
> > >> Attention: Pam Minty
> > >> PO Box 15207
> > >> Portland, OR 97293
> > >> USA
> > >>
> > >> +1 503 231 6548
> > >> 40frames.org <http://40frames.org>
> > >> 16mmdirectory.org <http://16mmdirectory.org>
> > >>
> > >> _______________________________________________ FrameWorks mailing
> > >> list email suppressed
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> > >
> > >
> ------------------------------------------------------------------------
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