Re: [ATM] Refractor Lens Cell

[wb0poq@visi.com]

Quoting "aneves@snowsoft.biz" <aneves@snowsoft.biz>:

> Hi,
>
> I just polished out my 7.5" achromat and the next stage is a cell to be able
> to test the lens. Since I made a fraunhofer type lens, do I need to make an
> adjustable cell or will a simple cell do? From what I've read the fraunhofer
> does not need an adjustable cell!
>
  I would *certainly* recomend a cell that would allow you to align the lens
assembly with the tube.  If you are asking about a cell to allow for alignment
of the crown and flint, that may be a bit more forgiving in a Fraunhofer (I
really don't know), but my experience suggests life is easier if this can be
done.
  BTW, do you have any details of your grinding/polishing/testing process posted
anywhere, such as on a Web site?  I have made a couple of objectives and would
love to see how you went about it.  I'm always ready to learn.  :))

Bob
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