Nick, I can't say about the Bellows A vs M differences because I believe they both do the following trick for aperture coupling...
With the Bellows A, you focus with the lens wide open. When you go to shoot the picture, you fire the camera via a 'double' cable release. The release has two cable lines. One attaches to the lens end of the bellows and pushes the stop-down lever on the lens. The other attaches to the camera's shutter release and fires the shutter. Now here is the trick. The 'double' cable release is about 1/2 inch longer on the lens side, so as you depress the plunger the sequence becomes -- lens stops down, then shutter button is depressed. The regular aperture coupling isn't 'preserved', but you are always shooting 'at aperture' (stopped down) with the lens so exposure is correct. It seems to me, you could do this with the M bellows with a 'double' cable release. Regards, Bob S. [EMAIL PROTECTED] writes: << I know that with certain bellows attachments you lose aperture coupling and have to figure out exposure manually accounting for the loss of light to the bellows. But is there a bellows that allows aperture coupling? Is that what the "Bellows A" that I recently saw advertised is? If it is not, what is the difference between Bellows A and M? Thanks you. >> - 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 .
