I thought the calculations were important as a first approximation for a
place which I think we were told is not easy to get to.
Chuck Norcutt
On 8/1/2013 10:18 AM, Bob Whitmire wrote:
> You can also go out the night before and eyeball things. They won't be
> exactly the same as on shoot-night, but they'll be close. Then, with gear
> ready, you prepare to use your shoe leather to position yourself in exactly
> the right spot.
>
> --Bob "No Math" Whitmire
> Registered Neanderthal
>
> On Aug 1, 2013, at 12:05 AM, Chuck Norcutt wrote:
>
>> If you use the Windows calculator in scientific mode you will not see
>> ArcTan listed as a function on the keys. To compute ArcTan click the
>> "Inv" (inverse) setting above the function keys and then click the
>> "tan" button. The expression ((W/2)/D) computes the tangent of the half
>> angle between camera and width of the lighthouse. Arctan converts the
>> tangent into its inverse which is the angle. Multiplying it by 2
>> converts the half angle into the full angle.
>
--
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