Re: Masuyama's, what do we know about them?

From: Mike Simmons (mikes_at_mtwilson.nospam.edu)
Date: 07/31/04 

Date: Sat, 31 Jul 2004 10:45:19 -0700

On Sat, 31 Jul 2004 17:20:44 GMT, Lawrence Sayre <lsayre@neo.rr.com> wrote:

> Chris1011 wrote:
>> Masuyama also makes Baader Eudascopic eyepieces, and I believe the
>> Celestron
>> Super Plossls. Roland Christen
>
> Roland,
>
> Is the company still called Masuyama, or is there an optical designer
> named Masuyama, or both? Do you know if there is a link to the Tak LE
> series here as well?
>
> Lawrence Sayre

We have an eyepiece at Mt. Wilson labeled "Masuyama" in a way that I've
always taken to be the brand, not the design. In fact, I believe the
design is a Kellner (labeled as such, IIRC). This is not a "normal"
eyepiece, though -- it's focal length is 100mm and it's in a 4-inch
barrel. We use it for visual observing at the f/16 Cassegrain focus of
the 60" telescope. I can examine the eyepiece in more detail, if you
like, when I'm back on the mountain in a few days.

I think I know where the eyepiece came from (perhaps 10 to 15 years ago)
but I'd have to check some sources to be certain.

Mike Simmons

Relevant Pages

  • Re: Masuyamas
    ... >Rich wrote: ... or the generic eyepiece that had been re-badge ... >The thread is mainly trying to unravel the history of the real Masuyama, ... Celestron called, "The Ultima" was being shopped around by the ...
    (sci.astro.amateur)
  • Re: Get Me Started (again...)
    ... designed for visual use and the higher end models especially tend to come with low profile focusers designed for eyepiece use. ... In order to do imaging with one of these on a platform drive, you will need to push the focal plane further out of the focuser by either shortening the poles on a Truss design, or pushing the mirror forward in a solid tube design. ... For children this is especially difficult as you will need some means to get them up to the eyepiece of larger apertures. ... Give him as much aperture as possible and digital setting circles. ...
    (sci.astro.amateur)
  • Re: Im disappointed, why would Tom Back say this?
    ... >It's really quite simple to do in any of these simple eyepiece designs, Plossl, ... >eyepiece design with the resultant astigmatism that all Orthos and Plossls ... >could design a common Ortho or Plossl to have no astigmatism over a 30 degree ...
    (sci.astro.amateur)
  • Re: Building first dob - questions
    ... > - What's the optimum eyepiece height to design the dob at? ... > with my little Mak-Newt using a drummer's stool, but the dob is going ... So do you try to design it to do most of the ... way of observing at that position, even if the eyepiece is pointing ...
    (sci.astro.amateur)
  • Re: Eypiece quality
    ... Each design has its weaknesses and strengths. ... scopes similar to yours and with their eyepieces. ... just cannot look through an eyepiece with them on. ... If you are into wide field of view with good eye relief than the ...
    (sci.astro.amateur)