P.J. writes:
<< Everybody raves about the 80mm b/c of it's 1:1 ratio, etc., but what
is the verdict on the 135mm Macro? >>
It is comparing apples and oranges. The 135mm f/4.5 (actually f/4 for
viewing) is a 1:10 optimized macro which just happens to focus to
infinity - and performs well at that distance. With its tripod collar it
is a very useful lens for table-top product photography, giving a very
useful working distance. It also excels at shooting small critters that
spook easily - although I have never mastered the push pull focusing,
even after having this for about 14 years. The small range helical
focusing (for fine focusing) is a VERY useful feature.
<< For that matter, how is magnification measured? I have the 50mm
Macro and get what seems to be lifesize on a 4X6 print. Obviously,
prints are not the measuring stick for magnification, but that is how I
think when I imagine the finished product. >>
Size on image:Size in real life. Example: 1" wide on the film:2" wide in
real life = 1:2. Another example: 4" wide on a print:2" wide in real
life = 2:1. The key point here is what image are you referring to. Lens
specifications relate to the image on the film.
<< I tripped the shutter and it sounded like 1/4 sec. Next, I left the
f-stop the same and moved the camera to auto and tripped the sutter.
The shutter stayed open for well over 1/4 second, probably closer to 1
sec. This happened for both my OM-2 and OM-2n. I realize this is
pretty inexact, but I don't have the electronic background as some of
you clearly do. So, any thoughts on what might be causing this? >>
On auto, the meter was reading off the film plane. Sounds like you had
no film in the camera, thus it was reading off a black surface.
Gary Reese
Las Vegas, NV
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