[Frameworks] JK OPSQ Exposure Timing

[Seth Mitter]

Hi Zach,

This line from the JK106 manual (http://www.filmlabs.org/docs/JK106.pdf)
suggests that the default exposure may be 0.175 or 1/6th second:

> (EXP TIME) - EXPOSURE TIME
> Selects the desired exposure time in increments of 0.1 seconds. The
> minimum open-shutter exposure time of 0.175
> (for Bolex H 16 Rex. 120 rpm motor = 1/6 of the second exposure time ) is
> automatically accounted for. "0" exposure time = this value.
>

In anycase, I've never relied on any mathematical calculation for exposure
using a JK, just lots of bracketing exposure tests.


On Thu, Jun 24, 2021 at 8:10 AM Zach Hart <zach.hart23 at gmail.com> wrote:

> Hi Hi,
>
> I've been getting some strange results on the optical printer the past few
> days and wondered if anyone on this list could confirm the out of the box
> exposure time for the JK OPSQ unit.
> I always assumed it was 1/4 second. But is it even less? Perhaps even an
> 1/8th of a second?
>
> I've been searching online, but can't seem to find a solid answer.
>
> Also, does anyone on here have experience printing 7222 to PF2? I've done
> it in the past, but it seems my best exposure time should be
> 105v - .5 second shutter - f4
> this seems a bit crazy, but considering PF2 has such a low ISO, maybe it's
> just normal.
>
> I'd really appreciate any help!
>
> Thanks y'all!!
>
> Zach
> --
> Frameworks mailing list
> Frameworks at film-gallery.org
> https://mail.film-gallery.org/mailman/listinfo/frameworks_film-gallery.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://film-gallery.org/pipermail/frameworks_film-gallery.org/attachments/20210624/489813ee/attachment.html>