The subject is sufficiently important for a general reply.
500 mm is long for hand held work, but both Anthea and I have used 500
mm mirror lenses with success - no question of stopping down as they are
fixed aperture. They are very light, so there is no problem with what I
will call "fatigue shake" - a conventional 500 is going to be 500mm long
and correspondingly heavy, and awkward, although the mass itself will
have a damping action. A zoom lens will be much shorter but will still
be fairly heavy. Using the highest available shutter speed with lens
wide open will reduce the distance the camera moves while the shutter is
open; this of course will mean less depth of focus. (Life wasn't
meant.....).
Hold the camera firmly but not tightly with both hands, and elbows
braced against your body. Breath out as you prepare to "click" , and in
again afterwards. After several years, this becomes automatic! Even on
a boat off Stewart Island NZ, where the albatrosses were often too close!
Brian Fleming
Ivanhoe
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