I don't think Samsung repair GX20's any more

Seems to have a very poor Guide No. 60 (ISO100 / 105mm)
and that's with a 105mm lens

Far too big by the looks of it!

Why do Pentax users always want everything brought out for
other systems?

Don't put it over the pulleys!

Great interesting shots!

I wish I'd been there I could have pulled
funny faces and gestured in the background!

They used to sell large prints in a shop in Southport and
even though they were mass produced they were quite
remarkable and the tonality was very superb even on
a print.

A lot of CZ lenses were made in Japan with a bayonet that
wasn't adaptable to AF and had they brought out a Contax AF
Camera it would have meant everyone who had bought the
expensive MF lenses buying the same lenses again in an
AF mount They had previously let their users down
by stopping production of Zeiss Ikon cameras because they
couldn't compete with the Japanese..... not impressive
at all

The allies split CZ up into E and W after the war, but it
was always expected that they would eventually be brought
back under one roof which did happen when the wall came
down.

It's even documented on the Western CZ site link

They also have a database in the Western Head Office containing
all the numbers for the lenses manufactured in the East. The only
lenses not covered and I presume not recognized as CZ are some
Japanese re-badged lenses that the UK importer brought in
without the knowledge of CZ (East).

So it's official that the East lenses are CZ some of which are
of historic importance. The early 50's lenses for the Western
Contax were also made in the East. The glass used was a
continuing development of what CZ had used for approx.
100 years. The factory and most of the workforce were
the same as before the war. Unfortunately they had to
compete heavily on price. Some of the poorest quality
lenses were made during the war when materials and new
tools were scarce and there was only one CZ. Correspondence
exists between East and West regarding what products
the East are to concentrate on.

You might find this 135mm shootout interesting.

http://oomz.net/135/

The Pentax-M 135mm f/3.5 isn't included, but it is a sharp lens.
It hasn't got the bokeh of the CZ and close focus isn't very
good. I found the Jupiter 37A to be sharper than both and
similar to the CZ in bokeh, which it should be, because it
is basically a smaller copy. It's also a T mount so it
can be changed over to a K mount for about 5 Pounds (UK).

I was thinking of Moonrise, Hernandez, New Mexico

I was at a loss with the subject luminance values, and I
confess I was thinking about bracketing several exposures,
when I suddenly realized that I knew the luminance of the
moon – 250 c/ft2. Using the Exposure Formula, I placed
this luminance on Zone VII; 60 c/ft2 therefore fell on
Zone V, and the exposure with the filter factor of 3x
was about 1 second at f/32 with ASA 64 film. I had no
idea what the value of the foreground was, but I hoped
it barely fell within the exposure scale. Not wanting
to take chances, I indicated a water-bath development
for the negative.
Ansell Adams

The negative bore little resemblance to the final print

You can start practicing by photographing the moon!