Nick, As I understand it, the bellows unit has a stopdown button much like a shutter button. The double cable release goes into the camera shutter and the bellows button. When you push the release, first the bellows stops down the lens and then the second portion of the release fires the shutter in the camera. Meter readings either need to be taken with the lens stopped down or in aperture priority. Since the lens stops down before the shutter is fired, the camera body can make a reading for subject and properly expose. The TTL meter will adjust for bellows extension.
The ideal camera for this type of unit is the LX. With it's low light meter off the film and changeable finders to allow for more comfortable viewing and focusing, I would find it the perfect combination. Note that cameras that can't take a traditional cable release (PZ, ZX types) can't use the double cable release and will always have to be used stopped down. Also, the bellows can handle mounting a lens reversed for further magnification. In that case, you do have to stop the lens down - the double cable release doesn't help much. Hope this explanation helps. I am awaiting confirmation that the unit is probably sold. Bruce Sunday, May 05, 2002, 8:54:32 PM, you wrote: NW> I know that with certain bellows attachments you lose aperature coupling and NW> have to figure out exposure manually accounting for the loss of light to the NW> bellows. But is there a bellows that allows aperature coupling? Is that what NW> the "Bellows A" that I recently saw advertised is? If it is not, what is the NW> difference between Bellows A and M? Thanks you. NW> -- NW> Nick Wright NW> http://www.wrightfoto.com/ NW> - NW> This message is from the Pentax-Discuss Mail List. To unsubscribe, NW> go to http://www.pdml.net and follow the directions. Don't forget to NW> 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 .
