The a Leica M3 is an SLR if it's fitted with a Visoflex - and not if it's not.
Or the Alpa Prisma Reflex is not because it looks like a rangefinder and it has
a rangefinder in it? You really can't insist on clear and rigid definitions
here - there are far too many exceptions, innovations, hybrids and just plain
weirdcams.
Andrew Fildes
afildes@xxxxxxxxxxxxx
www.soultheft.com
On 16/03/2012, at 10:25 AM, Chuck Norcutt wrote:
> And I will reiterate that the mirror is a defining characteristic of the
> SLR class of camera. The reason is that the mirror places a constraint
> on the usability of the camera. It must be lowered to view through the
> lens. While there it blocks the shutter and film or sensor. In digital
> cameras it prevents direct exposure measurement by the sensor. When the
> photo is taken it must be raised out of the way and the viewfinder is
> blacked out until it returns. The mirror also produces artificially
> long lens register distances and forces wide angle lens design into
> complex retrofocus designs.
--
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