RE: OT projector lens questions

2006-02-14 Thread Yefei He
s. Thanks again! Yefei > > Date: Tue, 14 Feb 2006 12:07:57 +1000 > From: "Rob Studdert" <[EMAIL PROTECTED]> > To: pentax-discuss@pdml.net > Subject: Re: OT projector lens questions > Message-ID: <[EMAIL PROTECTED]> > Content-type: text

Re: OT projector lens questions

2006-02-13 Thread Rob Studdert
On 13 Feb 2006 at 18:58, Yefei He wrote: > 1. Does a projector lens with longer focal length give a larger image > or smaller, if the projector to screen distance remains the same and assume > both are able to focus on the screen at that distance? My guess is wide > angle > lens gives a lar

OT projector lens questions

2006-02-13 Thread Yefei He
Hi, Folks, I'm doing some research on projector brightness. Not slide projectors, rather projectors for vitual reality applications, but the questions I have are relevant to both types. They probably sound pretty basic but anyway please bear with me: 1. Does a projector lens with lon