At 05:52 AM 07/16/2001, you wrote:
>>He (Arthur Morris) recommends pressing down on the
>>lens directly over the tripod mount with your hand to dampen vibration and
>>also not using a cable release, but, rather, using the camera against your
>>cheek and pressing the shuitter manually as a point of stabilization.
Henry Posner/B&H Photo-Video <[EMAIL PROTECTED]> replied:
>As far as I am concerned this is entirely USELESS advice.
I have used both the non-stabilized 800mm/5.6 Nikkor with at 1.4X converter as
well as the EF600/4L IS with 2X converter.
It seems to me the demon of vibration can never be completely slain at really
long EFLs. I use the technique Henry so dismisses here as well as clamping
everything down and using a cable release. Neither method eliminates camera/lens
movement at 1200mm, not even with IS. The best results are obtained with an
additional support under the camera but it need not be described how tedious and
usually impractical this is.
I find that IS is pretty effective using the method Henry decries but very
ineffective using the "hands off" technique. The movement imparted by your hand
on the lens barrel and cheek pressed against the camera is of low acceleration,
allowing IS to dampen it. On the other hand IS, not unsurprisingly, can not cope
with the very rapid acceleration resulting from mirror slap and shutter motion.
Make no mistake, at high magnification, the old bug bears of mirror and shutter
induced vibration remain a thorny problem. IS is a rerrific boone to hand-held
photography but I find it of little use on the tripod. I am still glad to have
it mind you.
In short, long telephotography remains tough. :>(
--
Terry Danks
Nova Scotia, Canada
Wildlife & Nature Photography
http://www3.ns.sympatico.ca/danksta/home.htm
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