Black Summicron 90 with preset diaphragm

[echorec]

Just stumbled across this one and I am curious: Which was more common - black or chrome with the preset diaphragm?

Thanks,

Gunnar

[jc_braconi]

Some years ago I asked that to PHvon Hasbroeck.
The answer was: " the black one is the most encountered".

here is mine

[echorec]

Thanks JC, and a nice picture too!

[tobey bilek]

No actual numbers but I have seen lots of Chrome presets and never a black one. Lot of blacks without preset though.

[echorec]

Hello Tobey, that is my experience too.

[str]

There is another problem: Does the aperture of the lens go to
16 or to 22? Of course, the barrel indicates 22. Are the serial
numbers of lens an barrel the same? (Mostly you can find
the numer of the head also in the barrel.)

I only know preset 2.0/90 with aperture going only to 16.

str.

[luigi bertolotti]

Originally Posted by str

There is another problem: Does the aperture of the lens go to
16 or to 22? Of course, the barrel indicates 22. Are the serial
numbers of lens an barrel the same? (Mostly you can find
the numer of the head also in the barrel.)

I only know preset 2.0/90 with aperture going only to 16.

str.

Yes, for what I know, the preset facility was only to f 16; but, to complicate things, it must also be taken into account that the Summicrons of this kind were "composable-reworkable" a lot... there was the short mount Viso version (the preset diaph. was originally made for this), but one could buy separately the long mount (and I think the long mounts were all engraved to f 22), and also the preset facility was available separately : INVOO / 00001 : chrome or black ? it was available until 1974, a time in Summicrons 90 were provided black only...

[str]

There are more complications, I think. Of course you can combine
short mount Summicrons and long barrels. The first type of barrels go
to f. 16 and have coarse focus knurl, they are screw mount barrels,
most of them have factory fittet M mount and the red dot. The lenses
also have f. 16. There two types of knurling of the end of the barrel.

The second typ of barrels has f. 22. The knurling is a bit different and
changed often. They ar only M mount lenses, I think. The lenses have
fitted to thes barrals go also to f. 22. There is in my opinion no preset
Summicron originaly with this barrel.

Of course you can combine all detachable Summicron heads with
all barrels, either f. 16 or f. 22. Sometimes you must adjust the barrel,
for the focal length of these Summircon differs often a little bit.

The lense head on the picture I bought last year at Vienna, the barrel
at Stuttgart, the adjustment was made in Hannover, but you can find also
lenses with aperture preset and long barrel, bearing the same serial
number:

90-1.jpg

Regards
Stefan

[jc_braconi]

Originally Posted by str

The first type of barrels go
to f. 16 and have coarse focus knurl, they are screw mount barrels,
most of them have factory fittet M mount and the red dot. The lenses
also have f. 16.

This is the case about mine.

[echorec]

Mine has 22:

[jc_braconi]

Fine,
Mine is from early 1960,

[luigi bertolotti]

Originally Posted by echorec

Mine has 22:

22 on the preset ring !!! I thought it didn't exist... really would like to compute how many different configurations can be made from this venerable lens... from math istinct (to be verified)... I'd say at least 2^5=32... or 2^6=64...

[echorec]

Hi Luigi, that is interesting.

Mine has number 1983114 (83114 on the inside).

[str]

Originally Posted by echorec

Mine has 22:

Thank your for sharing, really interesting. I never has seen an
item like this.

Regards
Stefan

[jc_braconi]

Originally Posted by echorec

Hi Luigi, that is interesting.

Mine has number 1983114 (83114 on the inside).

year 1963

[echorec]

Thanks JC.