From: Ralph Seguin 
To: Ralph Seguin , atm{at}shore.net
Reply-To: Ralph Seguin 


Oh yeah.
I also forgot to inquire about sizing for secondary and tertiary mirrors.
It would seem to me that I would need to place the secondary closer to the
primary, and thus might need a larger secondary mirror.

I'm hoping to use star diagonals for the tertiary mirrors to simplify the
building process and save time (in short supply).

Thanks.
-Ralph

-+- Ralph Seguin  wrote:
>
> Ok.
> In an insane rush to get things done before our trip
> to Hawaii next week, I want to put together a
> binocular telescope that I can bring with us.
>
> I have a pair of matched 6" f/5-ish mirrors (would
> prefer 8", 10" or larger, so if anybody has any...).
>
> My questions are:
> -What are the necessary adjustments in order to get
> proper image fusion?
>
> -How do you handle IPD adjustment?  I've thought of
> using a linear bearings/slides for moving one of the
> entire tubes, or by having focussers on one or each
> tube to handle side to side (IPD) translation.
>
> Problem with the first solution is making the
> structure super stiff.
>
> The problem that I see with the 2nd solution is that
> it will require additional in/out translation to do
> focusing (not a big deal).
>
> -How much of a problem is field rotation?
>
> -How do you deal with it?  I've been told that field
> rotation is the biggest headache cause for fusing
> images.
>
> -Prisms or mirrors for tertiary mirrors?
>
> -How do I carry this on a plane without having them
> assume I am a terrorist?
>
>
> Thanks.
> -Ralph
>
>
>
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