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Re: 請問 由 **chuen Lee** » 2011-05-29, 19:20 Thank!我會考盧一下

Thank!我會考盧一下

由 **mwtse** » 2011-05-30, 12:34

: 一塊鋁; DSC04815_small.jpg (62.26 KiB) 被瀏覽 18594 次

: 底部鑽孔，攻螺絲紋，另鑽一孔供腳架定位; DSC04816.JPG (73.89 KiB) 被瀏覽 18594 次

: 背部有一凹位藏波頭（萬向關節），但圖中看不到，只見 iPad 架緊貼鋁塊; DSC04818_small.jpg (67.75 KiB) 被瀏覽 18594 次

由 **David** » 2011-05-30, 22:55

Thanks for the pics

由 **mwtse** » 2011-06-02, 14:31

幫你造好一塊 adaptor，如果你覺得個 iPad座可以用的話，下次行鴨寮街幫你買。

由 **David** » 2011-06-02, 15:05

mwtse 寫:幫你造好一塊 adaptor，如果你覺得個 iPad座可以用的話，下次行鴨寮街幫你買。

That would be great because, from what you mentioned, there are a few different holders and I would not know which one is suitable!

My school will buy a few iPads for teaching purpose and I will certainly use them in stargazing activities.

由 **mwtse** » 2011-06-02, 21:07

想請教（不過我們越來越離題了），你覺得有沒有可能使用 iPad 使同學明白天球的概念？

P.S. iPad 的管理很花時間，而且學校購買硬件容易，但買 apps 就相當麻煩，基本上，要每部 iPad 申請一個 iTunes account。還有要看看你學校的 WiFi AP 支援的連線數目。

由 **David** » 2011-06-02, 21:50

mwtse 寫:想請教（不過我們越來越離題了），你覺得有沒有可能使用 iPad 使同學明白天球的概念？

I haven't found a way yet. But I believe that it is very difficult to use a 2D screen to simulate such 3D ideas. That's why I use Digital Starlab to teach celestial sphere in school.
viewtopic.php?f=12&t=1167

由 **mwtse** » 2011-06-02, 22:10

David 寫:
mwtse 寫:想請教（不過我們越來越離題了），你覺得有沒有可能使用 iPad 使同學明白天球的概念？

I haven't found a way yet. But I believe that it is very difficult to use a 2D screen to simulate such 3D ideas. That's why I use Digital Starlab to teach celestial sphere in school.
viewtopic.php?f=12&t=1167

I'm thinking of the orientation tracking -> virtual reality.

由 **mwtse** » 2011-06-07, 17:52

David 寫:
mwtse 寫:幫你造好一塊 adaptor，如果你覺得個 iPad座可以用的話，下次行鴨寮街幫你買。

That would be great because, from what you mentioned, there are a few different holders and I would not know which one is suitable!

My school will buy a few iPads for teaching purpose and I will certainly use them in stargazing activities.

David:

Two good news to you, first, the iPad adaptor is completed, see
viewtopic.php?f=20&t=1183&p=10334#p10334

Please PM me for arrangement, our schools are not too far away, but I think your school is easier to reach by car, so may be I drive to you in an afternoon that is convenient to you. The total cost is $60. If you do not drive, may be you could come to my school at Causeway Bay. Parking here is complicated.

The second good news is that, we can probably manage the iPads via WiFi, more or less automatically, after the introduction of the new iOS 5.

由 **mwtse** » 2011-10-08, 18:55

社長寫:
因為我用天文攝像頭投影出來的木星、月面的實時形態，包括某些細節在望遠鏡下的能見度，是我手上的軟件所不能模擬的。

這個教學望遠鏡設定的討論很有意思，或許我一會把帖分割成另一主題? 因為已跟chuen lee的帖無關了。

社長，想請問有些甚麼攝像頭推介？想找 BNC 出視頻的，不想接電腦，但 MallinCam 太貴了。

由社長 » 2011-10-09, 04:54

Mallincam曾幫人訂過一次，的確很貴，出厰前還要"burn in"。

Video cam 不太熟，可以比較下Orion有幾款的：

http://www.telescope.com/Astrophotograp ... /99645.uts

由 **mwtse** » 2011-10-09, 08:36

社長寫:Mallincam曾幫人訂過一次，的確很貴，出厰前還要"burn in"。

Video cam 不太熟，可以比較下Orion有幾款的：

http://www.telescope.com/Astrophotograp ... /99645.uts

Orion 的與 MallinCam Jr 外型一樣，價錢差不多，不過 MallinCam 使用 Sony CCD，但 Orion 使用 Mintron 72S85HN-EX-R COLOR。看描述似乎 MallinCam 要好一點？

http://mallincam.tripod.com/id53.html

由社長 » 2011-10-09, 12:28

對這方面真的不懂，我PM你城大潘生的電郵，或許你可以向他請教一下 :oops:

由 **mwtse** » 2011-10-09, 13:59

謝謝社長的資料，不然我不會找到以下這一段討論：

Re: Orion Starshoot Deep Space Video Camera

Dave et all,

Here are serious differences here. For one, no Orion products are handcrafted.
They hire other companies to do their stuff. They have no saying in primary
design. Even their own ccd cameras are made in Canada.

The model number they have for their so called video camera is a security one.
It has no features at all and lack serious memory capacity to function as a
astronomical camera. It has a green led. Our own MallinCam Jr has RED led among
a ton of various specification.

The MallinCam Jr. is a breakthrough for amateur astronomer who seek a low cost
alternative that will exceed Orion's and others so called design.

- Hand picked 1/2" Sony ICX 428AKL EXview HAD ccd sensor with Micro Lens
technology
- Dual separated memory management for menu function and camera function.
- 3D SDNR Super Digital Noise Reduction eliminate the use of a Peltier cooler
and remove 99% of hot and warm pixels.

Unique from and back black colored casing made by Wakayama, not Mintron

- All this is a unique design by MallinCam not Mintron or anybody else.

- 2 YEARS warranty on the camera. Not one year like others.
-MallinCam design from ground up, we also use our own video ccd sensor board
made for astronomical video camera.

- Unsurpassed sensitivity.

Here's a sample of features not even found on Orion's:

http://mallincam.tripod.com/id53.html

As per MallinCam website:

Pro-Com Electronics Has Been in Business of Astronomical Video CCD Cameras Since
1985, The Longest in the Industry and is the Maker of the MallinCam JR. A Entry
Level Astronomical Video CCD Camera Capable of a Lot at a Low Cost! Don't be
Fooled by Other Websites Copying our same Specs and Features. There is only One
MallinCam Brand World Wide.

- MallinCam Unique Super High Gain Circuitry Allow to view Deeper Sky
Observation ( Made in Our Facility)
- The MallinCam JR can be used as a VideoFinder with FULLY ADJUSTABLE CROSS HAIR
( A MallinCam World First in the Industry)
- Frame Integration of up to Full 4 seconds (256X)
- Color Mode, Black and White Mode fully Selectable from the On Board Menu
- BNC Composite Output
- Color Bar Generator for Monitor Calibration
- Mirror Image Inversion in Horizontal and Vertical to Match any Optical System
- Full Shutter Adjustment from: OFF, 1/100, 1/250, 1/500, 1/1000, 1/2000,
1/4000, 1/10,000
- 3D Digital Noise Reduction with near ZERO Hot Pixels, ZERO Warm Pixels!
- White Balance Selectable in Wide or Narrow to Reject Light pollution and Sky
Glow
- Auto White Balance Selectable
- Mask Feature with 4 Selections for Cross Hair or other Selectable Shape for
VideoFinder (TM) Mode
- Title Generator to Write Object Seen on Screen
- Selectable AGC Mode
- 2 Mode Gamma Selection
- Zoom Feature
- Two Selectable Picture Enhancement Mode.
- Selectable Color Image, Black and White Image or Auto Mode
- Operate from -32 C to +50 C
- Sensitivity well Exceed 0.000009 Lux in Color Mode and More in Black and
White Mode.
- High Grade 1/2" EXview HAD Micro Lens Technology CCD Sensor from Sony
- Come complete with 1.25" Adapter, 120 Volts AC to 12.1 Volts DC Fully
Regulated, and Video / Power Cable.

It gets better. All the people, resource, free time pioneer in the video ccd
camera have worked so hard to make what is now the future of amateur astronomy
observation. NSN was eventually created, tons of money got spend by us designing
and making video ccd camera at a low cost only to have a large corporation such
as Orion's who is now trying to enter a market by stealing all the hard work of
everyone and their dedication and research and they are now going to profit from
everyone hard dedicated work.

To me this shows weakness and money greed in its prime form. Zero experience in
the field, zero knowledge in video ccd live observation.

They also post that the camera is a imager to do astrophotography.
We at MallinCam always and will continue to stand strong in indicating that
video ccd cameras are NOT IMAGER. They are live instrument to enhance visual
observation. Orion is posting false advertising regarding the matter.

To top it all: Jim Turner and I are paying for the invention and use of NSN
for the benefit of all amateur astronomers live on line. I first started to
broadcast in late 2007 and worked our way up to NSN. Orion's plan to jump in
there for free while true dedicated observers and manufacturer already lay the
strong foundation for amateur astronomers??

I wish they had the decency of getting involved with NSN or at least contact
some of use with their plans. To my, they have no business ethics.

To those who use and support the research we do at MallinCam, something else is
coming soon. Orion's won't be happy. Just part of continuing advancement of
video ccd cameras and live observation.

Rock M.

MallinCam 的生產者對 Orion 推出一款外觀上非常相似的攝像頭感到非常不快，不過卻反映出就算是 Junior 型號，MallinCam 還是有獨到之處，所以若 4000 元左右的價位，我會選 MallinCam Jr。不過，問題是貨期不知要多久。我或者會嘗試把手頭有的幾部 CCTV 改裝，看看效果如何。

由社長 » 2011-10-09, 14:45

有些商業糾紛，外人難以說得清。

謝sir是否準備用這個作教學及示範用途? 應該是針對深空天體的展示了? 若不經電腦，應該用小型投影機之類的? 能簡單介紹一下想法?

我現人在廣州設定西藏天文台的電腦，單是網絡上的操控已跟在香港完全不同概念，很難想像到了西藏叫天不應的情況下，若遇上任何問題如何解決....

由 **mwtse** » 2011-10-09, 17:21

社長寫:有些商業糾紛，外人難以說得清。

謝sir是否準備用這個作教學及示範用途? 應該是針對深空天體的展示了? 若不經電腦，應該用小型投影機之類的? 能簡單介紹一下想法?

我現人在廣州設定西藏天文台的電腦，單是網絡上的操控已跟在香港完全不同概念，很難想像到了西藏叫天不應的情況下，若遇上任何問題如何解決....

現在香港的學校都設有家長教師會，每年都會舉行周年大會，周年大會的主菜是選舉下一屆的委員。由於要遷就家長的時間，周年大會會在傍晚舉行。有一個想法是在學校的操場裝設二支望遠鏡，訓練數名學生作講解員，可以借這個機會向家長推廣天文。但若要求家長花時間讓瞳孔擴張來觀測，相信家長未必會有興趣，所以打算用視像頭接小型 LCD 電視，但未知能否看到較容易的梅氏天體（行星和月面一定沒有問題），而另一支望遠鏡可以目視。小型 LCD 電視價廉，基本上即開即用，也不會像電腦一樣容易出各種問題，電源供應亦比較簡單，使用 12V 鋰電便可以；投影機可以讓更多的人觀看，不過因為沒有合適的牆壁，要架屏幕就比較麻煩。
要帶學生觀星，家長的同意是相當關鍵的。

由社長 » 2011-10-09, 19:37

若是這情況，我建議還是考慮用DMK41 / DBK41，一來是1/2"晶片片幅大些，二來不用外接電源，一條USB線便可供電及操控，我們這數年來都沒什麼連接或啟動問題，影像質量也高些。

映美精除了可拍行星月面幀速夠高外，最長曝光時間達一小時，但一般曝光十多秒已可把一些明亮的星雲或星團拍下來，在無導星的情況下也差不多了。

由 **mwtse** » 2011-10-09, 20:55

社長寫:若是這情況，我建議還是考慮用DMK41 / DBK41，一來是1/2"晶片片幅大些，二來不用外接電源，一條USB線便可供電及操控，我們這數年來都沒什麼連接或啟動問題，影像質量也高些。

映美精除了可拍行星月面幀速夠高外，最長曝光時間達一小時，但一般曝光十多秒已可把一些明亮的星雲或星團拍下來，在無導星的情況下也差不多了。

不考慮使用電腦了。不是攝像頭的問題，而是電腦本身不是設計／優化作為顯示屏來使用的，內裏有太多用不着的軟／硬件可以出問題，例如電腦硬盤會壞，機身要有地方放，開機要等，電池的續航力等等，我還是喜歡使用數百元一部的 LCD 電視，放在地上或裝上相機三腳架都可以。LCD 電視和攝像頭都使用 12V 電源，個人認為比 notebook 的電源供應要簡單。當然，我這十幾年來使用的幾部 notebook ，用電池時的使用時間都偏短亦是原因之一。

美國方面的代理有了回覆， MallinCam Jr 居然有一部現貨。雖然說是物以類聚，但整個 Astrocafe 的人都是用相同的器材未免太悶了吧，總要有些愚蠢人試試一些次一等的貨式，才顯得其他人更優越 :mrgreen:

由社長 » 2011-10-09, 22:51

那先向潘生請教一下，再決定哪個型號會好些，個人真的沒經驗....

由社長 » 2011-10-09, 23:00

mwtse 寫:美國方面的代理有了回覆， MallinCam Jr 居然有一部現貨。雖然說是物以類聚，但整個 Astrocafe 的人都是用相同的器材未免太悶了吧，總要有些愚蠢人試試一些次一等的貨式，才顯得其他人更優越

我很相信和而不同的，若日後的星空小聚能有不同品牌的大中小鏡冷凍相機目鏡雙目巴羅等，我就不用每樣東西都身先士卒了..... :lol:

謝sir有沒有興趣弄些不同目鏡回來大家測試一下，我會建議一些疑似候選品牌的 :mrgreen:

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