Balance Test For RC10 Prime Focus At CSky Remote Site.
My CEM70G is quite time consuming, but when I was shooting in the backyard,
The defective guide was tricked by adjusting the balance and clutch screw.
Since this is not possible when operating at an observatory, I used a reducer to reduce the focal length to F/8 => F/5.3 to stop the star.
Over the past six months, I've come to understand the meaning of various parameters of Manto and PHD2, and I wonder if I can operate F/8 just by adjusting the software. That's what I thought.
I was beginning to notice a clear difference in power between the 2000mm and 1340mm focal lengths with the same 10inch aperture.
The biggest bottleneck this time was the EFW with seven 2-inch filters. I also have a 5-disc pack, but just adding two extra discs is so big that it makes me wake up. 700g main body + 7 2inch filters weighs about 1k. As expected, it is difficult to maintain balance when 1kg is moved around.
So, I made my own counter weight for EFW and installed it. (CW is 4 scientific 100g weights)
I also removed the reducer and returned to Prime Focus at F/8 FL=2000mm.
I tested it with various people, and it seems a little lenient in the east, but there seems to be no problem in the west. The earing is also soft and seems to be covered by adjustment.
For now, here is a photo of Messier 8 taken in 50 minutes at the end of the test.
This is a test shot for a guide, so I don't really care about the color, but the blue wasn't enough.
CSky 観測所でのRC10 Prime Focusテスト
My CEM70G is quite time consuming, but when I was shooting in the backyard,
The defective guide was tricked by adjusting the balance and clutch screw.
Since this is not possible when operating at an observatory, I used a reducer to reduce the focal length to F/8 => F/5.3 to stop the star.
Over the past six months, I've come to understand the meaning of various parameters of Manto and PHD2, and I wonder if I can operate F/8 just by adjusting the software. That's what I thought.
I was beginning to notice a clear difference in power between the 2000mm and 1340mm focal lengths with the same 10inch aperture.
The biggest bottleneck this time was the EFW with seven 2-inch filters. I also have a 5-disc pack, but just adding two extra discs is so big that it makes me wake up. 700g main body + 7 2inch filters weighs about 1k. As expected, it is difficult to maintain balance when 1kg is moved around.
So, I made my own counter weight for EFW and installed it. (CW is 4 scientific 100g weights)
I also removed the reducer and returned to Prime Focus at F/8 FL=2000mm.
I tested it with various people, and it seems a little lenient in the east, but there seems to be no problem in the west. The earing is also soft and seems to be covered by adjustment.
For now, here is a photo of Messier 8 taken in 50 minutes at the end of the test.
This is a test shot for a guide, so I don't really care about the color, but the blue wasn't enough.
何かと手間がかかる私のCEM70Gであるが、裏庭で撮影していた時には
ガイド不良はバランスの調整やクラッチネジの調整で騙し騙し使っていた。
観測所での運用ではそれが無理なので、Reducerで焦点距離をF/8=>F/5.3に落として星を止めていた。
この半年、マントとPHD2の色々なパラメーターの意味が少しわかってきて、もしかしらソフト調整だけでF/8運用できるかも？と思っていた。
やはり同じ10Inch口径で焦点距離2000mmと1340mmではパワーの違いを歴然と感じ始めていた。
今回一番ネックだったのは2inchフィルター7枚差しのEFWだ。5枚挿も持っているけど、2枚追加になっただけで目が覚めるほどでかい。本体700g＋7枚の2Inchフィルターで約1kになる。流石に1Kgがあっちこち動くとBalanceなんかなかなか取れるもんじゃない。
そこで、EFW用のカウンター・ウェイトを自作して設置して見た。(CWは科学用の100gのおもり4個)
ついでにReducerも外しF/8 FL=2000mmのPrime Focusに戻した。
色々な方でテストしたが東はちょっと甘いが西は問題なさそうだ。穂がしもソフトで調整でカバーできそうである。
とりあえずTestの最後に50分で撮影したTestショットのMessier 8の写真をUpです。
ガイドのTestショットなので色をそんなに気にすることはないが、Blueが足りなかった。
Lumi 6 X 180secs
RGB 2X 180secs each
Ha 3X 300Secs
Total 51 Minutes
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