On Tuesday, May 1, 2001, at 09:52 AM, R. A. Greiner wrote:

> I used the TV bino viewer for several years...

I have the Baader/Zeiss/AP binoviewer. I use it most of the time for
lunar and planetary viewing, which is most of what I do from my suburban
location.

> The TV bino viewer is, if you have two relatively good eyes a
> wonderful accessory. It will greatly enhance your viewing
> experience.

When I first looked thru a binoviewer I was simply stunned. It is
absolutely fabulous, amazing, wonderul, right up there with sex and
orange juice. Now after years of using it, I find the one eyed view
awkward and uncomfortable.

> It is essential that you get paired eyepieces for the
> unit.

That has not been my experience. For me, at least, slight differences
in focal length don't matter. I've never seen a pair of eyepieces that
didn't work fine.

> I have seen posts that indicated that the TV variable eyepieces were
> so well matched that you could use a pair of them.

Yes. And I found that zooming was very easy; when the focal lengths
match the image just snaps together.

But binoviewers can be a little quirky. And they're not all the same.
I strongly suggest you find one to try out before making a big
purchase. I found that while I'm reasonably tolerant to focal length
mismatches that I have a hard time with collimation errors. One of my
friends has one that is useless for me, I can never get the two images
to fuse, though it is OK for him.

--
Bill Arnett
http://nineplanets.org/ 37 27 38 N 122 16 11 W

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