Why has Nikon not made ANY prosumer stuff with f2.0? Can't be that
hard as Canon/Casio, Olympus, Leica/Panasonic, Sony have all made
digicams with f2.0 or faster lens. The Sony has a 5X zoom that is
also class leading in resolution in the F707 so it is possible.
To have a f2.0, the front glass must be large enough to permit more
light entering the lens tube. Since the 5000 is designed (IMHO) to
use 9xx's converters that have a quite small rear element (i.e.,
28mm!), the front element cannot be larger. Otherwise, the image
projected from the converter can only cover a portion of the
on-camera lens and vignetting occurs.
Compatibility has been a big issue in many areas (e.g., cameras,
lenses, and computers). Manufacturers wish to keep their user
bases and are usually hesitate to come up with a completely new
design. Just think about the development process from MS-DOS, to
Windows 1/2/3.x, to Windows 95, NT, Windows 98/2000/XP. In terms
of system stability, Windows XP is still inferior to Unix (e.g.,
Linux). Is Microsoft incapable of creating a system as stable as
Unix? I don't think so. We keep asking for compatibility, which
means Microsoft must support many legacy software and hardware,
which, in turn, causes the designer not being able to do their best.
If Nikon is going to release a new digicam that might render most
of the converters not usable, many of us will start to complain and
may refuse to buy it. That is a dilema a manufacture and consumers
must face. To me, Windows is still an old 60 Ford with a flashy
looking outfit. But, I am not sure if I will buy Bill Gates' next
generation reliable system that is incompatible with the current
software. Money is still the major issue.
CK
http://www.cs.mtu.edu/~shene/DigiCam