good:
1) No mirror so less vibration (can hand hold at lower shutter speeds)
2) No prisim so lighter and smaller
3) No mirror so rear element can extend futher back - this results in higher
quality wide angle lenses -- however this design (common word but can't
remember!!) often has light fall off in the corners (not quite the same as
vignet). However, it also has very low distortion and very high resolution -
hence the high quality wide angle lenses for contax G, Mamiya 7, and Leica.
The lenses are also rel. cheap to produce so very high profit margins.
bad:
All the bad points are related to the how focusing is done -- you have
two viewfinders on the front - one in the rear - a simple mirror is used
when focusing and viola you get triangulation. However there are a bunch
of limitations due to parallax errors which impact both focusing and "what
you see is what you get" issues.
1) What you see is not what you get
2) No close focus (therefore nothing close to macro). around 1:8 or so is
best you can get.
3) limited range of lenses that can be use with built in view finder
(typically 28mm to 135mm) others require special view finder for framing.
4) Usually no lens longer then 135mm can be handled by the focusing mechanism
-- forget that 300mm or 500mm tele.
Fyi:
1) Some of these cameras have leaf shutters but most of the newer ones have
curtains - some of the curtains are vertical (cosina/bessa) some horizontal
(leica).
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|