Inside out: the Megrez

anat · Post by **anat** » Mon Apr 16, 2007 4:32 pm

I enjoy understanding how things work. What a beautiful Megrez!

anat · Post by **anat** » Mon Apr 16, 2007 4:35 pm

In less than a few minutes, it can be broken apart into pieces

The lens cell and focuser are simply screwed into the main tube. Because the tube is squared, there is no need to have a collimation mechanism at the lens connection.

Post by **acc** » Mon Apr 16, 2007 4:37 pm

Wow a lego scope! Looks beautiful.

anat · Post by **anat** » Mon Apr 16, 2007 4:39 pm

WO uses a 6-step foam baffle. This is how it looks like. It fits in the tube end near a focuser. Someone in US reports that the foam slips under low temperature.

anat · Post by **anat** » Mon Apr 16, 2007 4:43 pm

That is all

As long as we can find a tube, it is not difficult to make a good scope

yanyewkay · Post by **yanyewkay** » Mon Apr 16, 2007 5:07 pm

but where to find the glass elements to build it?

mrngbss · Post by **mrngbss** » Mon Apr 16, 2007 6:02 pm

yanyewkay wrote:but where to find the glass elements to build it?

Buy lens cell direct from lens manufacturers? There will be much fun. but I will have problems with the measurements.

anat · Post by **anat** » Mon Apr 16, 2007 6:14 pm

I used to make one from a TMB 80/480 lens. You can find the post in this forum.

yanyewkay · Post by **yanyewkay** » Mon Apr 16, 2007 6:23 pm

does that mean we can upgrade non-APOs to APOs just by changing the lens elements inside.

If possible I'm tempted man!

coating and grinding lenses isn't a "big" problem for me..

mrngbss · Post by **mrngbss** » Mon Apr 16, 2007 6:25 pm

You are right! William Optics has APO grade lenses for upgrade too!