> Darin <d.rhein@xxxxxxxxxxx> wrote:
>
> Wayne, I'm by no means an expert on OM gear, but I know of no
> accessories
> that screw into the ends of the focusing rail. Their only purpose to my
> knowledge is, as you said, to prevent the standards from falling off the
>
> ends.
>
Thanks Darin, I checked the ESIF and couldn't see anything there that screwed
into these threaded holes.
>
> If in fact the threads are an american standard thread, which I highly
> doubt
> since they were made in Japan, and are not 1/4-20, the finer 1/4 inch
> thread
> is 1/4-28. My guess, just from glancing at them, is that they're either
> 5mm
> or 6mm. Unless someone else happens to know off-hand, I work at a
> machine
> shop and can take mine to work this evening and check to find out for
> sure.
>
Yes, I suspect they are metric.
>
> As to mating two rails together, physically it could be done with a
> simple
> stud of the proper size. However, unless I misunderstand your question,
> this
> wouldn't be very practical since the rack gears don't extend fully to
> the
> ends of the rail. Therefore you'd end up with about a 1" gap between
> gears,
> resulting in the standards sliding freely along the rail.
>
I guess the section without the rack wouldn't matter too much, you'd just need
to avoid moving the standards over that section. I suspect that it would be a
weak point and something might break if both sections of rail weren't
adequately supported.
...Wayne
Wayne Harridge
http://lrh.structuregraphs.com
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