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From: mdavis@ccsmtp.glycomed.COM (Davis, Michael)
Date: Wed, 17 Sep 97 11:21:16 pst
Fwd Date: Fri, 19 Sep 1997 01:41:51 -0400
Subject: Re: 'Rods'?


>From: Mark Cashman <mcashman@ix.netcom.com>
>Date: Wed, 17 Sep 1997 02:28:57 -0700
>Fwd Date: Wed, 17 Sep 1997 04:29:11 -0400
>Subject: Re: 'Rods'?

>Speeds seem to be a bit slower. 9 km / hr for honeybees. Of course,
>that's ground, not airspeed. 15-20 km / hr for some others.
>Locusts can jump at velocities of 340 cm / sec which is .34 m / sec or
>.034 km / sec or 122 km  / hr, which is roughly 50 mph (I hate conversions)
>(Mark Cashman)
----------------
>From: BOB SHELL <76750.2717@compuserve.com>
>Date: Wed, 17 Sep 1997 09:46:44 -0400
>Fwd Date: Wed, 17 Sep 1997 10:59:47 -0400
>Subject: Re: 'Rods'?

>At the 5.2 mm setting the depth of field is enormous.  At a moderate
>lens aperture (f/8 - f/11) the depth of field extends from the front
>surface of the lens to infinity, so an insect zooming by at 1 mm from
>the lens front surface would still be rendered relatively clearly.
>(Bob Shell)

    Bob, Group,

    Provided the above flight speed info is accurate and combined
with the technical photography info, can we make any educated assumptions
as to weather the hypothetical insect would be in focus or out of focus?

    In other words, could we determine if a housefly traveling at
35 mph, 15 feet from the camera lens and photographed at 1/10,000 would
be in focus or blurry? Or do we need more specific information
regarding f/stop settings, film type, lens size, etc.?

Thanks,
Michael Davis
mdavis@glycomed.com