Hi!
I have not yet purchased a real Macro lens for high detail macro work
instead I am using close up filter kit to achieve magnification as great
as 1:1. There are two basic problems that I encountered while using this
kit. One is however, the depth of field is not enough for apertures like
f/8. I have to stop down to f/16 and sometimes f/22 to get acceptable
depth of field. A related problem is that the plane of focus is just
one. A very slight motion of the hand is enough to throw the subject out
of focus. Therefore, I always use tripod while doing macro
photography. Yet there is another problem that persists and it is low
shutter speed that I have to choose for an aperture of f/16,
22. Sometimes, it goes to as low as 1 second (I use 200 ASA speed films).
In this time period, if the subject moves either intensionally or
unintensionally (say, because of gentle wind), it is impossible to take a
shot. Another problem that I face is poor colour rendition.
Now, I have certain questions regarding a real Macro Lens, before
purchasing it. It will be great if I can purchase a macro lens of
magnification ratio of 1:1 but sometimes it is not possible. Macro lenses
having magnification of 1:2 can be converted to 1:1 by including an
adapter at its filter thread, e.g., Vivitar 100 mm f/3.5 Macro.
How does a macro lens with 1:1 adapter on behaves with respect to an
ordinary lens with close-up filter stacked on it as far as depth of field
and colour rendition is concerned ? Do I have to go down to smaller
apertures to achieve acceptable depth of field ? If yes, then there is
virtually no difference in using a macro lens and an ordinary lens with
close-up filters. Please note that low apertures demand low shutter speed
and here is the problem.
Any suggestion/comment (good/bad) will be greatly appreciated.
With kind regards,
Ayash Kanto.
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