Monday, July 31, 2017

A 12.5" Kit for Mike in

The OTA components for Mike's kit are coming along. Included is a
Baltic birch 6-point non-flotation mirror cell for Mike's full-thickness
primary mirror. Note the Destiny spider and Moonlite focuser.
 
Rear of the mirror board detail. There's plenty of "ventilation" to
help when the primary mirror is cooling.
Always beautiful work by Destiny and Moonlite. This focuser
is a "single-speed" with 2" to 1.25" adapter and compression ring.



Peter's "Adjustable Struts" ....

Here's a photo of Peter's 14" telescope
he's using adjustable "upper" struts
to finalize the strut length. Great idea.
One of Peter's specifications was that
the telescope would fit into his RV

Here you see it "under the bed"!!
The fit is juuuust right!!

Friday, July 28, 2017

Tom's 12.5" F3.92 is Completed....

Tom's short focus telescope is a dream to use. Easy to manage, easy
to setup and move around The struts are only 42" long in total

Note the eyepiece tray in the front of the rocker box.

The altitude bearings are 21" in diameter. When changing eyepieces the
telescope stays in position. Note the dew shield.


The 6-point flotation mirror cell design and optimized
with Plop. The struts are all black powder coated.

A 3-vane curved-vane spider and Moonlite 2-speed focuser..

There are two clamps for Tom's Telrad. Note the sliding 1.25#
counterweight just in case it's needed for different eyepieces.
An "afocal" shot of the moon with Tom's telescope
using a 17mm Nagler and Nikon point 'n shoot camera.

Not too bad!!!!

Eyepieces Anyone? ? ?

Putting the finishing touches on Tom's 12.5" telescope. Here an
eyepiece tray for his 2" eyepieces. All Baltic birch construction.

Wednesday, July 26, 2017

John and his 7" Refractor....

Last April I made a "mount head" for John's big 7" refractor.
I'm glad to hear from John who says "the mount works great"!

John lives in Richmond, Virginia.


Find the Center of a Circle ...

I've had some questions and comments about finding the center of a circle -- your mirror in this case. Here's some interesting examples I found on the Internet. They're pretty self explanatory, so have a look.

You can also look at my website for another method I like to use for the front of the mirror. ==> http://dobstuff.com/mountmirror.htm







Tom's 12.5" Telescope Almost Complete....

Tom's 12.5" strut telescope is just about complete. I'm having
the struts powder coated. 

Note the dew shield.