----- Original Message ----- From: Bob Talbot <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 01, 2002 10:31 PM Subject: Re: EOS Extension tube, light loss, CONFUSED
> > Don't have a lightbox? Have your computer display a blank white > screen. Set > > your lens to manual focus and push your lens right up to the screen, > and use > > the camera strap to cover the viewfinder. > mmmm > > on my computer screen the 1n seems to pick random values over a 5 stop > range ... must be the refresh rate or sommat. Recent EOS cameras react so fast to light changes (E-TTL etc.) that pointing them at a monitor for this purpose isn't a good idea, and trying to photograph a monitor using auto-exposure (even with Tv set to say 1/2 sec.) produces a high number of failures. Manual exposure should work given a long enough exposure to smooth out the refresh. Hard experience a short time ago when I was trying to prepare some slides for a presentation. M Stewart Milton Keynes, UK > * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
