美國Lunt / 德國 APM 1.25”Herschel Wedge 太陽菱鏡

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美國Lunt / 德國 APM 1.25”Herschel Wedge 太陽菱鏡

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社長 » 2010-02-26, 16:54

Herschel Wedge太陽菱鏡被認為是觀看白光太陽最安全及優質的方法之一。其原理是置於望遠鏡後,以一片楔型菱鏡把入射光及熱量95%折射,只讓5%反射至目鏡端,並配合2片ND3(減光1000倍)及偏光鏡進一步減光,偏光鏡的特點是可轉動目鏡以因應倍率調節舒適亮度,或攝影時適合的曝光時間。

與現時常用的鏡前減光膜相比,太陽菱鏡的造價較貴,但影像質量最高,而且可靠耐用得多。

警告:Herschel Wedge 必須配合ND3及Polarizeer / Green Continuum等濾鏡使用,以及嚴格依從以下次序
- 望遠鏡 > Herschel wedge > ND3.0濾鏡 > 偏光濾鏡 > 目鏡 或 相機

- 望遠鏡 > Herschel wedge > ND3.0濾鏡 > Green Continuum 濾鏡 > 目鏡 或 相機
若僅作高倍拍攝而非目視,可以按曝光需要而略去偏光濾鏡或Green Continuum

以1.25” 規格計,適用於2500mm焦距望遠鏡或以下,若主鏡焦距更長的,可選用略貴的Lunt Solar System的2” 型號 (見最下圖,香港現貨供應,但要注意望遠鏡後焦點是否足夠)。

星河科研社已引入首批小量,下週抵港:

套件包括:
Lunt / APM 1.25”太陽菱鏡
1.25” ND3濾鏡、偏光鏡
手提鋁箱
全套港幣2230元

http://www.astro.hk/catalogs/products/id/185

2"版本 3010
http://www.astro.hk/catalogs/products/id/186

Baader 1.25" Green Continuum 濾鏡 港幣780元

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最後由 社長 於 2015-09-24, 10:41 編輯,總共編輯了 2 次。
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章David » 2010-02-26, 21:19

社長 寫:Herschel Wedge太陽菱鏡被認為是觀看白光太陽最安全及優質的方法之一。


數年前開始使用APM的Herschel Wedge,這東西的白光太陽真的很震撼,影像細節遠比其他方法(如Baader AstroSolar Film或Thousand Oaks濾鏡)好。通常我們會在目鏡加入偏光鏡,旋轉目鏡時,影像光度會改變,從而調校至細節最明顯的光度,方便欣賞。

雖然這東西是安全的,卻要非常小心使用。

1. 由於目鏡裝上用作減光的ND3濾鏡,是減光的重要部份,切勿如一般觀察時更換目鏡,因為其他目鏡通常沒有裝上ND3。
2. 由於望遠鏡主鏡前不作任何減光,除去Herschel Wedge時要非常小心。如果鏡指向太陽,强烈的太陽光會在鏡後聚焦。
3. 建議用Televue的Sol-Searcher或運用加上Baader AstroSolar Film的尋星鏡尋找太陽。
APM 80/480, SW 120mm Equinox, C8, Obsession 18"UC with Argo Navis & StellarCat
Lunt LS60T/CaK, LS152T with DSII
DMK31AF03, DMK21AF04, DBK21AF04
Mark V Binoviewer, Ethos (3.7mm, 6mm, 13mm), 19mm Panoptic, 5mm TMB mono
http://www.imsc.edu.hk/pages/astronomy
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章社長 » 2010-02-27, 01:05

謝謝David特別提醒,太陽觀測首要是安全及依足方法去做。

1. 若作目視,兩片濾鏡必須同時用上。
2. 若作拍攝及以電腦控制相機,不會經眼睛觀看的話,可免去偏光鏡以縮短曝光時間

另外一樓的價格原來算錯滙率,已更正了,抱歉。
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配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-27, 08:36

Is it both 4.jpg & 5.jpg are taken with the Herschel Wedge?
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章David » 2010-02-27, 10:15

I have never taken any pictures with Herschel Wedge. The visual impression is more like 3.jpg rather than 4 and 5. It may not seem like a big difference from ordinary solar film, but once you've seen the real thing, you will not use those solar film again if image quality is what you go for.

I believe 4 and 5 were taken with very large aperture scopes under excellent seeing.

May be I can try to take a full disk picture using APM 80/480, with Herschel Wedge and Baader Solar Film separately. Need good weather... :x

A good reference on Herschel Wedge:
http://www.cloudynights.com/ubbthreads/ ... t/all/vc/1
APM 80/480, SW 120mm Equinox, C8, Obsession 18"UC with Argo Navis & StellarCat
Lunt LS60T/CaK, LS152T with DSII
DMK31AF03, DMK21AF04, DBK21AF04
Mark V Binoviewer, Ethos (3.7mm, 6mm, 13mm), 19mm Panoptic, 5mm TMB mono
http://www.imsc.edu.hk/pages/astronomy
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-27, 10:29

Thanks David! WHat is the size of ur Herschel Wedge? 1.25" or 2"? ANyway, even u said it looks like 3.jpg, it is very good already in term of white light observations. I don't don't know the FS60C's back focus supports the Wedge, as u know FS60C's back focus is real short! Anyway, I guess Equinox 80ED can fo the job with bigger size...
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章David » 2010-02-27, 10:42

willis 寫:Thanks David! WHat is the size of ur Herschel Wedge? 1.25" or 2"? ANyway, even u said it looks like 3.jpg, it is very good already in term of white light observations. I don't don't know the FS60C's back focus supports the Wedge, as u know FS60C's back focus is real short! Anyway, I guess Equinox 80ED can fo the job with bigger size...


Mine is 1.25".

Yes, you need to ensure that focus can be achieved. When I first bought it, I used it with Takahashi Sky 90. I knew that there was no focus problem because Oldfield So also used exactly the same combination and he said that there is absolutely no focusing problem.

May be you can try my wedge first before buying one.
APM 80/480, SW 120mm Equinox, C8, Obsession 18"UC with Argo Navis & StellarCat
Lunt LS60T/CaK, LS152T with DSII
DMK31AF03, DMK21AF04, DBK21AF04
Mark V Binoviewer, Ethos (3.7mm, 6mm, 13mm), 19mm Panoptic, 5mm TMB mono
http://www.imsc.edu.hk/pages/astronomy
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-27, 10:56

Thanks for telling! May be I need to try first. At the same time, I want to sell my C5 & 5" Oaks as well. I have now M8, and C5 is not much used. The 5" Oaks can be replaced by Herschel Wedge as well...
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章David » 2010-02-27, 11:35

willis 寫:Thanks for telling! May be I need to try first. At the same time, I want to sell my C5 & 5" Oaks as well. I have now M8, and C5 is not much used. The 5" Oaks can be replaced by Herschel Wedge as well...


Herschel wedge is only for refractors, not SCT. I haven't tried Herschel wedge on Equinox 120. I hope that it can reach focus.
APM 80/480, SW 120mm Equinox, C8, Obsession 18"UC with Argo Navis & StellarCat
Lunt LS60T/CaK, LS152T with DSII
DMK31AF03, DMK21AF04, DBK21AF04
Mark V Binoviewer, Ethos (3.7mm, 6mm, 13mm), 19mm Panoptic, 5mm TMB mono
http://www.imsc.edu.hk/pages/astronomy
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-27, 11:41

Thanks for telling! I checked from internet already. I intended to use the Herchel wedge on refractors for grab-and-go purpose. SCT + solar filter is too bulky in this case...
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-27, 17:15

David 寫:I have never taken any pictures with Herschel Wedge. The visual impression is more like 3.jpg rather than 4 and 5. It may not seem like a big difference from ordinary solar film, but once you've seen the real thing, you will not use those solar film again if image quality is what you go for.

I believe 4 and 5 were taken with very large aperture scopes under excellent seeing.


I stained 4.jpg into Ha color like. The detail doesn't look like Ha image. But the texture is quite unique. I wonder if Equinox 120 and Herschel wedge can achieve such quality or not.
附加檔案
4_red.jpg
4_red.jpg (95.08 KiB) 被瀏覽 24297 次
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章社長 » 2010-02-28, 11:22

willis 寫:Is it both 4.jpg & 5.jpg are taken with the Herschel Wedge?


對,都是1.25" Herschel Wedge的,但Markus說忘了拍攝數據 :?

不過邏輯上看,Herschel Wedge本身只是一個光學平面,所以這些圖片主要用來說明Herschel Wedge對影像質量 "do no harm" 就夠了。

據我經驗,要用100mm口徑或以上才可拍到這樣的細節,所以你的Equinox 120應沒問題。後焦點不用太担心,因為和1.25"天頂無分別(但FS60可能不太夠),效果好一點用DMK拍會好些,若用單反則後焦點長些,效果也弱些。

我的經驗是,用老款Herschel Wedge在APM-TMB 105/650上目視看太陽,那些米粒組織、臨邊昏暗等層次感很好,太陽呈立體感的,相對於Baader Film的層次感會好。

另外拍攝時也可以考慮用一片好的綠色濾鏡取代那片偏光鏡(Baader的叫Green Continuum,非常窄頻的,但沒有1.25"),因為折射鏡的綠光修正度最好。
Copy of P1000486.JPG
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兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
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配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-02-28, 12:10

Good! Pls reserve one for me.
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章horace » 2010-03-01, 09:32

Thanks for the info. Reserve one for me please.
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章社長 » 2010-03-02, 00:29

ok, thanks.

will arrived next week ;)
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章funoooo » 2010-03-02, 20:21

Dear Willis and horce,

Please testify it and tell me the result. I am really conserve the photo quality. If that is good and easy handle. I will buy one for myself.

funoooo :D
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-03-02, 21:49

No problem! Wait for my photos!
Tak FS60C, APM-LOMO 80/480, APM-TMB 105/650, SW Black Diamond 120ED, Borg 125SD, SW 12" Dobs , Lunt LS35T, Lunt LS80T
TMB Super Mono 4mm, Pentax XO 2.5mm, Baader Planetarium 8-24mm, Nagler (2-4mm, 3-6mm, 13mm), Ethos (3.7mm, 6mm, 10mm), Explore Scientific 100º (14mm, 20mm)
DBK 21, DMK 21, DMK 41, DMK 51, ASI 178MC
Nikon D810A, Canon 5D II, Fujifilm X-T10
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Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章社長 » 2010-03-03, 22:16

General description how to use a Herschelwedge

1. Only 5 % of the light going towards the eyepiece, 95% of the light going into the red rear plate where a very rough surface is spreading off the light . Our experience so far show that by using the Herschelwedge in a 130mm APO all day long under Florida Sun at 70° Farenheit / +20° Celsius show that the red rear cover is getting very warm , but not hot enough to burn your fingers. Be careful in real hot summers with touching the red rear cover

2, the Herschelwedge can be used in Refractors and Schiefspieglers only, never use them in a Schidt Cassegrain or Maksutov Cassegrain or Newtonian telescope. Never use the Herschwelwedge in a telescope with inner plastic parts like plastic baffles, they can bend and burn

3, Light entering the front objective is cool and has the same temperature then outside air temperature. At the objective the light is starting to produce a beam which gets more and more narrow and more and more intensively as close you come to the focus point. Also as closer the beam come to the focus as hotter it gets. We have long time practical experience in using Herschelwedges in Refractors up to 10" diameter without additional front filter, yes its safe!

4, visual solar observers usual want a 1/100,000 % light blocking, that caused by the wedge plus ND 3,0 Filter ( 1000 x ) and ND 1,0 ( 100 x ). By going up in the magnification you will notice this pure visual image is getting to darker and you wish to have more brightness. To get a nice variation of brightness we recommend therefore the filter combination ND 3,0 + Top Pol. This allows you to adjust the image brightness from photographic brightness to visual brightness. Imagers using older DSLR Cameras ( non Digital ) may want even a better brightness and buying therefore an additional ND 0.6 Filter to be used with the ND 3,0

5, Positions: insert the Herschelwedge into your focuser. Next step: Take your eyepiece and screw in the Top Pol Filter. Then screw the ND 3.0 on the Top Pol Filter, so the order is : focuser > Herschwelwedge > ND 3.0 > Top Pol > Eyepiece.

6, Brightness adjustment: the Top Pol Filter does by rotating the eyepiece ( so the Top Pol also rotates) a polarization with the Herschelwedge prism and you see a brighter or dimmer image, just as you like to set your personal preference.

7, Warning: do not mix up the order of the filters, ND 3.0 always closer to the wedge, Top Pol always closer to the eyepiece. See drawing.

8, Baader Solar Continuum Filter http://www.baader-planetarium.de/sektio ... _continuum. Its a high contrast filter showing the sun in green color. Its much better then a standard green filter. It would be used on the Herschelwedge with the ND 3.0 , range : Herschelwedge > ND 3.0 > Solarkontinuum > eyepiece. It provides a correct visual brightness

9, Filters: our testing, visual and optical bench testing shows that most filters have lower quality. Why using a high quality telescope with a high quality Herschelwedge (both are not cheap) and safe money for cheap bad quality filters, which are hurting the final image. Therefore we recommend and offering only the best possible and available filters on today’s market > BW Schneider Kreuznach / Germany, not cheap, but the best

10, The optical surfaces of the Herschelwedges are not critical, clean them the same way as you clean your eyepieces.

Enjoy your APM Herschelwedge

一般描述如何使用Herschelwedge

1,只有5%的陽光會轉向目鏡,95%的光線會折射至紅色後蓋散熱板上一個很粗糙的表面。我們迄今為止的經驗表明,在佛羅里達州,以Herschelwedge裝在130毫米APO折射鏡上讓陽光照射一整天,在華氏 70 ° / 20 °攝氏度的環境下,紅色後蓋變得很溫暖,但不仍致於燒傷你的手指,但仍小心在炎熱的夏天實際接觸紅色後蓋。

2,Herschelwedge只可用於折射和Schiefspieglers傾軸式反射鏡上使用,切勿在施密特卡塞格林或馬克蘇托夫卡塞格林式或牛頓望遠鏡上用。其他不能使用Herschwelwedge的望遠鏡,包括內襯塑料配件如塑料擋板,因陽光熱力可損壞這些部件。

3,陽光進入前面的物鏡時是涼快的,與室外空氣溫度有相同的溫度。在物鏡開始產生光束並變得越來越窄,越來越深入及接近觀測者的焦點時,更密集的光束會變得越來越熱。長久以來,我們在實際經驗中,在大至10英吋(254mm)口徑折射鏡上使用Herschelwedges而不加任何前置濾濾,證明它是安全是!

4,目視太陽觀察者通常只讓十萬份一個百份點陽光通過,方法是以太陽楔形菱鏡加ND3.0濾鏡(1000倍)及ND1.0(10倍)配合而成。當作目視觀察調升放大倍率會發現這個影象越來越暗,並希望有提高亮度。要獲得一個不錯的亮度變化,我們建議濾鏡組合為 ND3.0及偏光鏡。這讓觀測者可以由攝影的亮度到視覺亮度之間調節。若使用舊單鏡反光機(非數碼的),可能需要一個更高的亮度,建議購買額外的ND0.6濾鏡配合ND3.0使用。

5,次序:於調焦筒放入Herschelwedge,然後在目鏡端擰上偏光鏡,然後再擰上ND3.0濾鏡,所以順序是:調焦筒 > Herschwelwedge > ND3.0濾鏡 > 偏光鏡 > 目鏡。

6,亮度調節:因為旋轉目鏡時偏光鏡會隨著旋轉,可調節與Herschelwedge之間的角度,從而獲得更高或更暗的影像,視乎觀測者的個人喜好而定。

7,警告:不要倒轉濾鏡次序,ND3.0濾鏡永遠是較接近Herschelwege,偏光鏡則始終貼近目鏡,見圖紙。

8,巴德Green Continuum濾鏡 http://www.baader-planetarium.de/sektion/s37a/s37a.htm#solar_continuum是一種高對比度濾鏡,太陽影像為綠色,比常規的綠色濾鏡理想。使用次序為調焦筒 > Herschwelwedge > ND3.0濾鏡 > Green Continuum濾鏡 > 目鏡。它提供了一個理想的視覺亮度

9,濾鏡:經過多項視覺和光實驗測試顯示,大多數濾鏡質量不佳。那是為什麼應採用高品質的望遠鏡及Herschelwedge(兩者皆不便宜)而非花錢在平價劣質的濾鏡上,因為最終只會破壞影像質量。因此,我們建議並提供現今市場上最佳的德國BW Schneider Kreuznach濾鏡,這個並不便宜,但是最好的。

10,Herschelwedges的光學表面並不重要,像清潔目鏡一樣地清潔這個Herschelwedges。

享受您的APM Herschelwedge
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
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星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
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文章: 12681
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章社長 » 2010-03-03, 22:18

注意使用次序必須是:

Herschel Wedge > ND3 > 偏光鏡 > 目鏡

我下週亦會有小量Baader 1.25" Green Continuum濾鏡從德國發出。
兩個天文台 - 白鷺湖天文台、西藏自動化天文觀測站
主鏡 - Officina Stellare 500 口徑f3.8 RiFast攝星儀、APM/TMB 254 f9 APO、SkyWatcher Dob 18、305 f8.5 牛頓鏡、Paramount ME 赤道儀
配件 - 2 full sets of Supermonocentrics、Baader Mark V Binoviewer、Ethos、Canon 5D Mark II Mod、FLI Proline 16803冷凍相機、Mercedes SUV
星河科研社 http://www.astro.hk 電郵 saviofong@astro.hk
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社長
Site Admin
 
文章: 12681
註冊時間: 2010-02-01, 14:17
來自: 香港

Re: 德國 APM 1.25”Herschel Wedge 太陽菱鏡

文章willis » 2010-03-04, 00:00

社長 寫:注意使用次序必須是:

Herschel Wedge > ND3 > 偏光鏡 > 目鏡

我下週亦會有小量Baader 1.25" Green Continuum濾鏡從德國發出。


How come! So many poison! How much is this poison?
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文章: 1516
註冊時間: 2010-02-01, 17:50
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