Krasnogorsk 3 ISO/GOST Knob values

[Luigi Castellitto]

Can anyone tell me what are the intermediate steps of the knob of the Krasnogork 3? Those marked only with a point.

I scored those represented with a dot in red. The scale is:

.
12
.
25
.
50
.
100
.
200
.
I want to know the value, especially from 50 to 100. It's 75?

Another thing: I have the version for the Soviet market, but the on the knob is marked GOST/ISO (see attach photo). Both. They are ISO or GOST? The difference is minimal, I know, but I'd like to know.

Thank you! :)

[Mark Dunn]

There was never a 75 ASA. GOST has been identical to ISO since 1987.

There are actually two indices between each of the marked speeds, but since cine film was never made in 20, 32, 80 or 125 it's fair to suppose that the intermediate speeds are 16, 40, 64, 160 and 250. Unless you are shooting reversal it makes very little difference anyway.

Edited April 24, 2016 by Mark Dunn

[Luigi Castellitto]

EDIT:

1) Between 50 and 100, should be 64 or 80, 75 does not exist in the ISO scale, sorry!

2) The GOST scale have a different values numbers (8,11,16,22,32,45 ...), so, even though my camera had all written in Russian, those shown in knob should be ISO and not GOST. It's right?

[Luigi Castellitto]

Ops, Mark, I wrote the Edit while you you answered me, your quick and prepared in a Krasnogorsk world! :)

Edited April 24, 2016 by mbaarviao

[Luigi Castellitto]

Mark, thank you!

You say: "GOST has been identical to ISO since 1987", but my camera is older than 1987, or not? However, my second question I think it fixed, are ISO. Because the GOST have different scale (8,11,16,22,32,45 ...). It's right?

 

I hope that the value between 50 and 100 is 64, because I would like to use a Fuji 64 D. Although it is a negative film, and no need of precision, I'd like to set the exact value.

But some films, example, require 80 ISO setting, such as a b/w daylight film in tungsten shot, like Fomapan.

Edited April 24, 2016 by mbaarviao

[Luigi Castellitto]

I checked the films released with the values 20, 32, 80 or 125, they seem for photography and not for film.

Example between 50 and 100:

64: 64 Kodachrome, Ektachrome-X, Polaroid type 64T

80: Ilford Commercial Ortho, Polaroid type 669

Although it remains a doubt because the values 20, 32, 80 and 125 can be used the same, your argument is more convincing, Mark.

[Mark Dunn]

Hmmm. Rather than relying on faulty memory I should have looked at mine which is marked, most oddly, in ASA at 9,12,17,25,50,70,100,140,200 and 300

There's this, which has the 140:

http://www.kataan.org/gost-to-iso-conversion-chart/

[Luigi Castellitto]

Oh, what a strange values 9,12,17,25,50,70,100,140,200 and 300! O_O You have these values in your K-3? Sorry, I do not always understand English well.

Here we can see various versions of the knob of the K-3:

http://www.k3camera.com/k3/k3lightmeter.php

I'am a bit 'confused, eheh! But... it's possible that my Krasnogorsk was produced after 1987? They still were produced?