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Review of TMB optical Monocentric eyepieces



 
 
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  #1  
Old June 25th 04, 12:15 AM
Leonard
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Default Review of TMB optical Monocentric eyepieces

Hello Group ,

In the August issue of Sky and Telescope Mr Gary Seronik
does a review of the TMB Optical monocentric eyepiece and in my
reading of it comes to the conclusion that there is very little
difference (or none)in contrast and light scatter between the mono.
and two well known Plossls and a symmetrical . Three high quality
eyepieces to be sure but I would have thought more of a difference
would be seen between them and the mono. Mr Seronik did what appears
to be a very complete review . It comes as no surprise that in an F4.5
newtonian off-axis performance was less than excellent with the mono.
What do you all think about this review after such glowing
reviews from other people over the last few months ?
Leonard
  #4  
Old June 25th 04, 01:48 AM
Bill Becker
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Default Review of TMB optical Monocentric eyepieces


"Leonard" wrote in message
m...
Hello Group ,

In the August issue of Sky and Telescope Mr Gary Seronik
does a review of the TMB Optical monocentric eyepiece and in my
reading of it comes to the conclusion that there is very little
difference (or none)in contrast and light scatter between the mono.
and two well known Plossls and a symmetrical . Three high quality
eyepieces to be sure but I would have thought more of a difference
would be seen between them and the mono. Mr Seronik did what appears
to be a very complete review . It comes as no surprise that in an F4.5
newtonian off-axis performance was less than excellent with the mono.
What do you all think about this review after such glowing
reviews from other people over the last few months ?
Leonard


Personally, I think the phrase "your mileage may vary" was erroneously left
out of the review. I guess that's why there are so many different ocular
designs out there and each has their loyal following. g

Best regards,
Bill



  #5  
Old June 25th 04, 01:48 AM
Bill Becker
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Default Review of TMB optical Monocentric eyepieces


"Leonard" wrote in message
m...
Hello Group ,

In the August issue of Sky and Telescope Mr Gary Seronik
does a review of the TMB Optical monocentric eyepiece and in my
reading of it comes to the conclusion that there is very little
difference (or none)in contrast and light scatter between the mono.
and two well known Plossls and a symmetrical . Three high quality
eyepieces to be sure but I would have thought more of a difference
would be seen between them and the mono. Mr Seronik did what appears
to be a very complete review . It comes as no surprise that in an F4.5
newtonian off-axis performance was less than excellent with the mono.
What do you all think about this review after such glowing
reviews from other people over the last few months ?
Leonard


Personally, I think the phrase "your mileage may vary" was erroneously left
out of the review. I guess that's why there are so many different ocular
designs out there and each has their loyal following. g

Best regards,
Bill



  #6  
Old June 25th 04, 02:15 AM
Phil Wheeler
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Default Review of TMB optical Monocentric eyepieces



Leonard wrote:

Hello Group ,

In the August issue of Sky and Telescope Mr Gary Seronik
does a review of the TMB Optical monocentric eyepiece


What is a "moncentric" EP?

Phil

  #7  
Old June 25th 04, 02:15 AM
Phil Wheeler
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Default Review of TMB optical Monocentric eyepieces



Leonard wrote:

Hello Group ,

In the August issue of Sky and Telescope Mr Gary Seronik
does a review of the TMB Optical monocentric eyepiece


What is a "moncentric" EP?

Phil

  #8  
Old June 25th 04, 03:07 AM
Brian Tung
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Default Review of TMB optical Monocentric eyepieces

Phil Wheeler wrote:
What is a "moncentric" EP?


As I recall, a monocentric eyepiece is a three-element, one-group
eyepiece in which every surface has the same center of curvature--hence
the name. If anyone knows differently, please speak up.

Brian Tung
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt
  #9  
Old June 25th 04, 03:07 AM
Brian Tung
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Posts: n/a
Default Review of TMB optical Monocentric eyepieces

Phil Wheeler wrote:
What is a "moncentric" EP?


As I recall, a monocentric eyepiece is a three-element, one-group
eyepiece in which every surface has the same center of curvature--hence
the name. If anyone knows differently, please speak up.

Brian Tung
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt
  #10  
Old June 25th 04, 03:09 AM
Ratboy99
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Default Review of TMB optical Monocentric eyepieces

I have four of the TMB Super Monos (2-16's and 2-14's) and I haven't been able
to detect any
astigmatism in them at all. That's using my F8 Tak FS-152 and a Binovuew w/ 2x
barlow. Nice eyepieces actually...
rat
~( );

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