Advertisement
Selecting the lens
Each of the MP 4 lenses can be used
for a range of reproduction sizes. The
MP 4 macro extension provides
increased magnification (two extensions
can be used, if desired).
Often you have more than one lens/
macro extension option for a given
magnification. In most cases, if you
have a choice of lenses, you should
use the lens of longer focal length.
This will provide more working space
between the lens and subject.
Four MP 4 set-ups for 3X magnification
are shown:
135mm lens with two macro extensions
•
(7). This camera set-up provides the
most working space between the lens
and subject, but may be awkward to
use, due to its size. The distance
between the view-finder and the lens
1
will be about 26
using two macro extensions, the
"preview" cable elease must be
disconnected and the shutter operated
manually for viewing and focusing.
/
in./68cm. Also, when
2
•
105mm lens with one macro extension
(8). With this set-up, there is still ample
working space between the lens and
subject, and the camera is easier to use.
This may be the best option for 3X mag-
nification.
•
75mm lens alone (9). This set-up pro-
vides less working space below the
lens, making it more difficult to properly
illuminate some subjects. If necessary,
the subject may be raised above the
baseboard for easier lighting.
•
50mm lens alone (10). With this set-up,
there is very little space between the
lens and subject (less than 2 in./5cm.)
This will severely limit subject illumina-
tion. Note that the subject must be
raised above the baseboard for proper
focus.
6
Appendix
Advertisement
