Ahah! (flat hand slaps forehead), I forgot I can take a long manual exposure
even if out of metering range and look at the histogram.
Thanks.
Warren
On 2/19/08, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
> Before you go try some 15, 30, 60 and 120 second exposures in a dark
> room or with the lens cap on in order to check for hot pixels. I assume
> (but don't know) that the 330 has provision for hot pixel subtraction by
> taking another exposure with the shutter closed and subtracting the
> dummy one from the real one. Sensors heat up during long exposures
> which can create noise in the form of hot pixels... pixels that light up
> that shouldn't be lit. I would also do some tests of the same type at
> higher ISO's. I have no knowledge of the likely result but it seems
> possible to me that hot pixels could be either worse or better at 100
> ISO and 120 seconds vs 200 ISO and 60 seconds.
>
> I wouldn't worry about the metering... a test shot or two and review of
> the histogram will get the exposure right better than the meter. I'd
> worry more about the sensor heating up in a 2 minute exposure.
>
> Chuck Norcutt
>
> Warren Kato wrote:
> > If you would help me get my head around this issue, I'm going to the
> slot
> > canyons of S. Utah in a few weeks and I dug up my notes from my prior
> OM-4T
> > (wonderful camera-still have it) and the exposures were around f8, 15
> > seconds. Will the E-330 handle this? The Japan E-330 site says metering
> > range of EV 2 to 20 at 100 ISO. I would like to shoot at f8 or f5.6 with
> the
> > 11-22.
> >
> > If it gets cloudy above the canyons I would expect another loss of light
> of
> > 3 stops or so, meaning f8, 2 min (f5.6 1 min or f4, 30 sec). Will the
> > metering system handle this?
> >
> > I could always take to OM4-T but this seems a step backwards.
> >
> > Warren
> >
> >
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