Archived posting to the Leica Users Group, 2001/09/18

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Subject: Re: [Leica] Digital/ x ray
From: Rei Shinozuka <shino@ubspainewebber.com>
Date: Tue, 18 Sep 2001 05:07:09 -0400 (EDT)

some excellent points i wouldn't have considered.
particularly the fact that film is a self-replenishing "sensor"

with cameras like my nikon f3 with removable prism, it is indeed
impressive the amount of dust etc., that can settle onto a planar
surface, the effect of which is only evident when examined under
magnification.

yet more reasons not to leap into digital! :-)

- -rei

> From: leica@davidmorton.org
> 
> Dennis Painter wrote:
> 
> "Magnetic fields cannott affect digital storage unless it is magnetic i.e.
> floppy disks or tape or hard disks. Most digital cameras use semiconductor
> storage, not affected by magnetic fields."
> 
> The Microdrives that most folk use in pro digicams (such as the Nikon D1)
> are tiny hard disks.
> 
> "If dirt is a problem then don't change lenses ;-)  Likely this is a problem
> for
> just about any camera, the internals are going to be sensitive to dirt and
> dust."
> 
> The pro digital SLRs I've used are *very* sensitive to dust. You change the
> lens (not something that's easily avoided), dust gets into the body, finds
> its way onto the sensor surface and hence onto your images.
> 
> The sensor is *very* difficult to clean in the field, you can try putting
> the shutter on B and spraying the sensor with air, but IME it doesn't work
> very well. Usually it's a tech job.
> 
> At the same levels of dust and dirt a conventional camera just keeps going.
> 
> In practical use, dust on the sensor is a *serious* problem.
> 
> -- 
> David Morton
> dmorton@journalist.co.uk
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