From: Christopher Harris (email suppressed)
Date: Wed Aug 18 2010 - 04:31:03 PDT
Thanks Alain, I think you pretty much diagnosed the problem.
CH
Date: Tue, 17 Aug 2010 21:39:16 -0700
From: email suppressed
To: 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
_______________________________________________
FrameWorks mailing list
email suppressed
http://mailman-mail5.webfaction.com/listinfo/frameworks
-- 40 FRAMES Alain LeTourneau Pam Minty 40 FRAMES Attention: Pam Minty PO Box 15207 Portland, OR 97293 USA +1 503 231 6548 40frames.org 16mmdirectory.org _______________________________________________ FrameWorks mailing list email suppressed http://mailman-mail5.webfaction.com/listinfo/frameworks
_______________________________________________
FrameWorks mailing list
email suppressed
http://mailman-mail5.webfaction.com/listinfo/frameworks