APM Coma corrected 2.7x Barlow

[社長]

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

[kong]

such a big toad jumping around the street...? i want one!

[universe24]

看来我要把现有的barlow卖掉了...
价格有包括什么配件吗？

[社長]

我現正按排發貨回來，稍候進一步訊息。

馬來西亞愛好者可以用Paypal支付港幣，另加30元空郵掛號便可以。

[neodeemer]

这个和TMB 1.8配合使用....可以覆盖不少焦段

[benben88]

Is it 1.25" or 2" ? Any photo?

[社長]

1.25"的，接環部份稍後到貨，然後一批過發回來，有興趣的可以現在跟我訂購。

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APM-comacorrected 1.25“ EB Barlow 2.7 x

Designed by Gerd Düring/Germany

Due Forum discussions pushed, Gerd Düring in Germany designed us a new improved coma corrected ED Barlowlens, optimized for parabolic mirrors with f-ration F/4. The

Barlow use as ED-element the chinese ED glas FK61 ( similar to Ohara FPL 51), the lenses are soft cemented and applied on both sides with a broadband multicoating with over 99% transmission for the wavelength from 400 nanometers to 700 nanometers. The optimum backfocuse is 105 mm from center last lens. The focal length of the barlow is – 62.9 mm. The clear aperture of the barlow is 22 mm.

The Barlow offers with its 22 mm aperture in secondary focuse with 100% illumination a photo-visuell field of view of over 30 mm diameter at the 105 mm backfocuse. The 2 part adapter is photo-visual optimized, visual with optimum backfocuse of 105 mm with a new APM-Deluxe-Centerinclamp, this top Deluxe adapter , 55 mm long, can be unscrewed , then you have a photographic T2 Thread ( M42x0.75) for use with DSLZ and T2 ring.

First images show that APS-C works perfectly.

Delivery Time:
- Barlow lens in 1.25” cell in stock
- 1.25” eyepiece holder set has some weeks delivery time

Markus Ludes

[社長]

such a big toad jumping around the street...? i want one!

我想等接環到貨一起發，所以要稍等，但現在可下單。

[社長]

這一兩天德國發貨。

[cocowind]

不知道理解对不对：
1. 2寸接环是用来目视做目镜的adaptor的。
2. 2寸接环可以扭下来，然后相机T2接口直接接1.25寸部分的T2口就可以了，这时候后截距是105mm
3. 看图2寸接环上还有个M42*0.75环，那是干嘛用的？

1.25"的，接環部份稍後到貨，然後一批過發回來，有興趣的可以現在跟我訂購。

quote
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APM-comacorrected 1.25“ EB Barlow 2.7 x

Designed by Gerd Düring/Germany

Due Forum discussions pushed, Gerd Düring in Germany designed us a new improved coma corrected ED Barlowlens, optimized for parabolic mirrors with f-ration F/4. The

Barlow use as ED-element the chinese ED glas FK61 ( similar to Ohara FPL 51), the lenses are soft cemented and applied on both sides with a broadband multicoating with over 99% transmission for the wavelength from 400 nanometers to 700 nanometers. The optimum backfocuse is 105 mm from center last lens. The focal length of the barlow is – 62.9 mm. The clear aperture of the barlow is 22 mm.

The Barlow offers with its 22 mm aperture in secondary focuse with 100% illumination a photo-visuell field of view of over 30 mm diameter at the 105 mm backfocuse. The 2 part adapter is photo-visual optimized, visual with optimum backfocuse of 105 mm with a new APM-Deluxe-Centerinclamp, this top Deluxe adapter , 55 mm long, can be unscrewed , then you have a photographic T2 Thread ( M42x0.75) for use with DSLZ and T2 ring.

First images show that APS-C works perfectly.

Delivery Time:
- Barlow lens in 1.25” cell in stock
- 1.25” eyepiece holder set has some weeks delivery time

Markus Ludes

[社長]

1. Yes

2. 扭下來便可以接T Ring

3. 沒有的，只是手擰環來鎖緊目鏡

[cocowind]

明白，大致了解了。说离轴导星成功率低是因为不容易找到被导星？

1. Yes

2. 扭下來便可以接T Ring

3. 沒有的，只是手擰環來鎖緊目鏡

[社長]

一來光圈小,二來良像圈也小

明白，大致了解了。说离轴导星成功率低是因为不容易找到被导星？

1. Yes

2. 扭下來便可以接T Ring

3. 沒有的，只是手擰環來鎖緊目鏡