APM Coma corrected 2.7x Barlow
發表於 : 2012-07-24, 14:25剛收到Markus Ludes的測試報告，可作參考。
售價：港幣1100元
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Finaly we have a nice week with great Seeing
I could test my new coma corrected 2.7x barlow on a 10”F/5 Newton, where it corrects perfectly the coma, superior to any other barlow.
In center totaly colorfree, much much better then Astro-Physics Barcon Barlow
Our Barlowelement can also be screwed directly into the eyepiece, even in this worse configuration my barlow performs in center and at the edge still better then AP Barcon. The Barcon show , distorsion, coma and astigmatism in Ortho, Erfle, Panoptic, Naglers and Ethos, while mine show in Ortho at edge same quality as in center and on the tele Vue it shows only slightly distortion
Tonight I tested the Barlow on a Takahahsi FS 102/820 Fluorite Apo
Even on a apo, my new barlowlens performs perfect. The AP Barcon again the worsest, more color in center, more distortion on the edge of the eyepiece field, more color at the edge.
The TMB 1.8 x ED holds mostly up, however my real Apo Barlow show a hint better spherical correction and a hint better colorcorrection in center , then the TMB 1.8 x barlow. At the edge of the eyepieces the TMB and my Apo Barlow are about equal
This means my new barlow screwed into the eyepiece with about 1.7 x power or with its normal eyepiece holder with 2.7x power has a quality which exceeds those of my TMB and of the Zeiss ABBE Barlow, for very low price
This new barlow also works as a optical path corrector in binoviewers much much better then then the original Baader Optical path corrector
You have to see and compare it, to believe this quality
Markus Ludes
APM-Telescopes
售價：港幣1100元
Quote
-----------------------------------------------------------------------------------------------------
Finaly we have a nice week with great Seeing
I could test my new coma corrected 2.7x barlow on a 10”F/5 Newton, where it corrects perfectly the coma, superior to any other barlow.
In center totaly colorfree, much much better then Astro-Physics Barcon Barlow
Our Barlowelement can also be screwed directly into the eyepiece, even in this worse configuration my barlow performs in center and at the edge still better then AP Barcon. The Barcon show , distorsion, coma and astigmatism in Ortho, Erfle, Panoptic, Naglers and Ethos, while mine show in Ortho at edge same quality as in center and on the tele Vue it shows only slightly distortion
Tonight I tested the Barlow on a Takahahsi FS 102/820 Fluorite Apo
Even on a apo, my new barlowlens performs perfect. The AP Barcon again the worsest, more color in center, more distortion on the edge of the eyepiece field, more color at the edge.
The TMB 1.8 x ED holds mostly up, however my real Apo Barlow show a hint better spherical correction and a hint better colorcorrection in center , then the TMB 1.8 x barlow. At the edge of the eyepieces the TMB and my Apo Barlow are about equal
This means my new barlow screwed into the eyepiece with about 1.7 x power or with its normal eyepiece holder with 2.7x power has a quality which exceeds those of my TMB and of the Zeiss ABBE Barlow, for very low price
This new barlow also works as a optical path corrector in binoviewers much much better then then the original Baader Optical path corrector
You have to see and compare it, to believe this quality
Markus Ludes
APM-Telescopes
