I'm putting together a list of common mounts with some notes on each for publication, and came across an interesting oddity. It doesn't seem to be very clear who actually developed the OCT-19 lens mount. Very many of the lenses available in that mount are by LOMO, but I'm not sure that they actually developed it, or when it came into use.
Anyone know anything about this?
i think it will be difficult to determine when and where exactly the mount was developed without visiting archives/libraries in russia
though there is interesting information available online, some of which you may already know:
OST stands for "Industry Standard" (Otraslevvoj Standart) - so something specific to a particular industry
GOST is a "State Standart (Gosudarstvennyj Standart)
and in this case ОСТ-19-144-83 became GOST 26157-84 (view here), which i believe is still valid to this day
officially OCT-19 came into effect in 1984 (!) - see this document here
on page 4 the paragraph reads
"Starting in 1984, lens housings for 35- and 70-mm film will be manufactured with a single mount for installation into film cameras, which have a mount diameter (посадочный диаметр...?) equal to 68mm and flange distance (рабочий отрезок) of 61mm (OCT 19-144-83). In 1989, 35-mm film lenses will be made available with Arri PL mount, to make our lenses compatible with western film cameras.
This overview is based on the materials provided by CKBK Ekran, with contributions from lab results of lens tests by NIKFI"
but unoffifically... who knows
it was very likely developed prior to the actual introduction of Konvas 1КСР-2М (whose designed was meant to use a single lens, instead of its turret predecessor)
from the materials i have read, it seems that NIKFI and MKBK would have been involved in the creation of what would become OCT-19 mount
NIKFI is Cinema and Research Institute (Научно-Исследовательский КиноФотоинститут // http://www.holography.ru/nikfieng.htm, http://www.nikfi.ru/)
MKBK is Moscow Cinema Equipment Construction Bureau (Московское конструкторское бюро киноаппаратуры)
Moskinap, like Lomo, at that time were the manufacturing plants. The design came from above-standing structures.
and yes, OCT-18 is of a slang term, not an actual standart
OCT's starting with 18 cover things like lip gloss (18-209-75), soap (18-235-75), and mineral water (18-224-82)