The Olympus E-System
uses a chip that is 18mm x 13.5mm, providing a field of view that is
approximately half that of a traditional film body. This means that
your 50mm lens effectively becomes a 100mm. The positive side of this
is that you get improved telephoto reach, however this does come at
the expense of wide angle coverage. The widest Minolta manual focus
rectilinear lens is the 17mm f/4, which on the E-300 would become a
not-so wide 34mm. Additionally, the 17mm is hard to find and can be
expensive.
While this may be
an issue if you were only using Minolta manual focus lenses, don't forget
that Olympus also manufacture an inexpensive wide angle zoom that can
be used if needed, providing coverage down to 28mm equivalent. The E-300
is available new on ebay with the standard 14-45mm lens for under US$400.
With the adaptor
in place there is no linkage between the camera and the Minolta lens,
and in fact the camera has no idea a lens is even attached. This means
that the user must utilise stop down metering, and naturally manual
focus.
When shooting at
apertures other than wide open the user must accordingly focus at full
aperture (for the brightest viewfinder), and then stop down to the preferred
aperture using the lens aperture ring. This can naturally make the viewfinder
dark at the moment prior to exposure if using an aperture of f/5.6 or
smaller, but it is not a real imposition in practice.
With no lens to
camera communication there is no way you can use shutter priority or
program mode on the camera. Aperture Priority works quite well and manual
is naturally always available. Unfortunately, in line with most modern
cameras the E-300 uses a two-control system to adjust shutter speed
in manual mode, with the user holding down a button and then adjusting
the control wheel. While not as simple as the Minolta cameras we are
used to, it is easy to become accustomed to with use. In aperture priority
a similar system is used to activate the +/- EV adjustment.