> On Mon, 31 Mar 2003 19:54:49 -0500, you wrote:
>
>
>>Now, the remaining issue is- even though you get solid lock down and
>>have IS - how about vibration induced by mirror slap? The pundits go
>>both ways on this (Fritz Polking is one of them). I could be wrong, but
>>I believe mirror "lock up" at shutter speeds between 1/60 and 1/15 of a
>>second finishes slightly, but very slightly better than IS. I've been
>>using IS only at those speeds and had no complaints regarding image shake.
>
>
>
> Interesting - I hadn't heard of it going as high as 1/60 - more right
> around 1/15.
Ken, actually I made somewhat of a misstatement (in context of the super
long lenses). The long lenses 400, 500 and up were reputed to suffer "standing wave" mirror problems at 1/125 and below (don't know the lower cut off).
<snip>
There's also the technique of damping the top of the
lens with one hand, so that a "standing wave" doesn't get set up. The
mirror slap shock travels outward and doesn't come back to jar the
exposure. According to Moose Peterson, anyway.
Makes intuitive sense.
Moose had it right - after all his lenses of choice still offer no alternative to dampening with the available (human) arm. But, Moose has to work his butt off trying to come close to shooting as well as Canon shooters.
No offense to Moose or Nikon intended, but long lens IS has to be one of the, if not the, greatest photographic technological improvements this century. I've had very good luck (not luck really) shooting at 1200 mm at shutter speeds as low as 1/30, 1/60 and absolutely at 1/90 and above, generally w/o extra effort or extraordinary care.
For example when 400 non IS was my longest lens I'd use a Kirk window mount with a ball head and shut of my engine to shoot from my vehicle. Frankly, my results were relatively poor. Now, at 1200 mm, engine running, tripod ring resting on the car door, I can count on very good results.
I can't understand why a Nikon shooter contemplating a (fast) lens of 300 mm or longer would buy Nikon equipment. Canon and Nikon long lenses are similarly priced so with the added cost of a used EOS 3 a Nikon, Minolta, Pentax, or Leica shooter could enjoy the absolute long lens advantage offered by Canon.
And I ain't just whistling Dixie.
Regards,
Plumviewer
* **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
