You only have to worry about that if you are using non-TTL meter. The TTL meter measures the light coming through the lens so automatically compensates.
BTW, a 2x converter has a 2 stop exposure factor. That is simply because it makes the lens 2x as long. For instance, a 50mm f2 has a 25mm aperture. The 2x converter turns it into a 100mm, but the aperture is still 25mm, that makes it a 100mm f4.0 lens. As an aside: We tend to use the term aperture as interchangeable with f-stop, that is not correct. Aperture is the diameter of the iris opening. F-stop is the focal length divided by the aperture. Ciao, Graywolf http://pages.prodigy.net/graywolfphoto ---------------------------------------------------------------- ----- Original Message ----- From: Piet Smit <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, April 03, 2002 5:32 AM Subject: advice on using a teleconverter?? > I've got me a 2x teleconverter and have been reading some things about it. As I > understand it a 2x teleconverter doesn't only enlarge 2x but also 2x less light comes into > the less. > > Does that mean I have to set the lighting stop button (or whatever you call it) to +2 ? > > thanx.. > ______________________________________________________ > http://mail.lycos.nl/ - Gratis E-mail - Nu 15 MB opslagruimte > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
