Asahi Pentax Auto Bellows M

Asahi Pentax Auto Bellows M, given by Patrick Brossier on march 20th, 2010.

This macro bellows is very sophisticated. A system keeps the aperture open for focusing, a lock button (on which you can screw a twin release cable) allows to close it for shooting.
You can mount the lens in reverse position*, by returning the front holder. A ring embedded in this front holder can be withdrawn and screwed on the filter mount (M49) of the lens to hold the bellows.
The curious guides on top were planned to hold reglets (lost) used to calculate the magnification.
*In the ordinary use of a lens, the distance between the lens and the subject is greater than between the lens and the film, the calculation of the optical formula takes it into account. In macrophotography, it's the opposite, the picture quality is theoretically better if you turn it.


With the 2.0 / 50mm in reverse position:

Pentax twin cable release for bellows bought on eBay on March 21st, 2010 (37,36£).

To control the closure of the diaphragm before the release of the camera shutter.

The part that connects the body is adjustable, there is a lock for long exposures in "B" mode.










A red ring on the tip of the cable corresponding to the diaphragm control button.

Asahi Pentax Slide Copier bought August 11th in a secondhand fair: 3€.

Three euros for a genuine Pentax accessory, I can't refuse!
Suspense during the way back home: will, as I suppose, this accessory fit on my bellows?

Yes !
Obviously, I can also mount a digital camera, to "scan" old slides. The release cable will not work, but I can lock the lens opening.

The front opens like a film carrier to allow the use of filmstrip (positive, obviously).