Tim,
I don't think so! I think that you might want to read John H's post
of yesterday or the day before. I still stand by my statement (which
John backs up).
Rand E.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
HI100@xxxxxxx wrote:
>
> rtomcala@xxxxxxxxxxx writes:
>
> << With the release of
> the OM2n, they added a small led in the viewfinder that added to the
> exposure and limited the long exposures to about 2 minutes. This is
> why, although I love my Om2n, I keep my OM2 also. The OM2 may be hard
> on the batteries during long exposures, but it gets the shot !
> >>
> Rand,
> Both the OM2 and 2N have led limiters. Their operation actually
> causes exposure errors for very long exposures in both cameras but the errors
> only start after 2min in the 2N. And the maximum time does not go to a lot
> longer than 2min. The 2N exposure cycle only differs from the 2 in that an
> analog timer delays the on-set of when the led is switched on and also the
> led is brighter causing the limiter to act quickly once switched on. The
> brighter LED is also more reproduceable over temperature etc so the limiting
> action time has a much tighter tolerance and does not contribute errors below
> the 2min timer limit. On the other hand the OM2 led limiter forces the camera
> to act as if there is a fixed very low light in the scene over most of the
> exposure cycle instead switching in only after 2min. Since exposures are log
> light intensity related the OM2 errors introduced only become very
> significant when the led level and the scene light level are getting to be
> similar in magnitude. The OM2 more gradual limiting action does allow for
> significantly longer exposure times but the limiter does eventually add
> significant errors although by that time film reciprocity is probably a much
> bigger problem.
>
> >> Tim Hughes <<
> >> Hi100@xxxxxxx
>
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