A little known accessory for Leica
screw mount cameras is the VACU. It was
made in a variety of versions. It
offered the use of flash equipment with Leica cameras up to the Leica
IIIc. Its replacement, the Leica IIIf
was the first model with built-in flash synch.
Leitz made several versions, all with
their own catalog designation. Ranging from CAVOO-A to CAVOO-F.
The CAVOO-A was to be used with the
Leica III, the CAVOO-B was for the Leica IIIa and IIIb and several versions for
the "c" model Leicas, from CAVOO-C to CAVOO-F.
The unit consisted of a small trigger
device that screwed onto the shutter release of the camera. It worked in conjunction with a small cam that
attached to the shutter release dial.
When releasing the shutter, the rotating shutter speed dial would
activate a small switch via the cam to fire the flash. This in turn was connected to the VACU via a
short cord with a PC fitting.
Leitz Vacu
The cam attachment came in four
different versions depending what model Leica it was for. A word of caution; I have seen versions of
the VACU offered for sale from time to time, but in each case the cam was missing,
therefore rendering the unit incomplete and useless.
Cam attached to shutter speed dial
Trigger Switch
The position of the cam on the
shutter speed dial is critical because it determines the position of the
shutter curtains at the moment the flash is triggered. Rotating it back or forth will allow for
exact positioning.
That, of course, requires a means to
see if the flash is fired at the correct moment. For this there is a very simple solution as
explained in the article “TESTING LEICA SM CAMERAS FOR PROPER FLASH SYNCH” from
March 8, 2012 on this blog.
VACU on Leica III Front View
VACU on Leica III Rear View
The first Leica I ever owned, a Leica
III, was equipped with a VACU. I still
consider it one of my prized possessions and I fondly remember leaning to take
pictures with this camera, including flash pictures. It is a great camera to learn with because everything
is manual. It created useful habits that
I still practice today. For instance,
after getting many severely blurred pictures, in spite of careful focusing, I
learned that it is advisable to pull out the collapsible Summar f/2 before
shooting.
Leica III with VACU
But that is ultimately a different
story. I don’t use the Leica III very
often anymore in these days of digital photography. But it does take up a prominent spot in my
Leica collection, together with the VACU attachment in place on the camera.
No comments:
Post a Comment