[time-nuts] A real world project need for timing accuracy...

[William H. Fite]

Exactly, jimlux, this is readily possible.

I find it interesting that no one has commented, one way or the other, on
the uncontrollable environmental variables I mentioned.  Is this just about
technology and not about validity?




On Tue, Nov 2, 2010 at 9:28 AM, jimlux <jimlux at earthlink.net> wrote:

> Bob Camp wrote:
>
>> Hi
>>
>> Ok, I mis-understood the question.
>>
>> In my experience, you can have big buck (as in many thousands of dollars)
>> optics and not see .2" holes at 800 yards. The bull's eye is a *lot* bigger
>> than the hole the bullet made.
>>
>> 0.2" at 2400 ft is about 0.08 milliradian.. or 0.3 minutes of arc.  Your
> eye can resolve about 1 minute of arc... I'm not questioning your
> experience, but it seem that even a moderate power scope should allow you to
> see the holes.  As I recall, the Rayleigh limit for resolution is something
> like 0.7 milliradian/mm of aperture, so 10-15 mm aperture would be in the
> right ballpark..
>
> I can imagine needing more aperture than 3", though.. you're not interested
> in resolving a star, but something more akin to separating dots.
>
>
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