有 6317 筆資料符合您搜尋的條件

PTS
週五 07 12月, 2018 00:20
版面: 天文攝影 Astrophotography
主題: M31, M32, M110 and M33 at Hokoon
回覆: 2
觀看: 112

M31, M32, M110 and M33 at Hokoon

M31, M32, M110 and M33 at Hokoon

Telescope: 15-cm refractor f/5
camera: ASI1600MM Pro, binned 3x3
North is up, east to the right
PTS
週四 06 12月, 2018 23:54
版面: 天文攝影 Astrophotography
主題: 2018 Dec 6 Neptune & Triton at Hokoon
回覆: 1
觀看: 42

2018 Dec 6 Neptune & Triton at Hokoon

2018 Dec 6 Neptune & Triton at Hokoon

Telescope: 50-cm RC reflector, f/8
south is up, east to the left
PTS
週四 06 12月, 2018 23:39
版面: 天文攝影 Astrophotography
主題: 2018 Dec 6 Uranus & satellites at Hokoon
回覆: 2
觀看: 87

2018 Dec 6 Uranus & satellites at Hokoon

2018 Dec 6 Uranus & satellites at Hokoon

Telescope: 50-cm RC reflector, f/8
Camera: ASI1600MM Pro or ASI174MC
PTS
週四 06 12月, 2018 23:36
版面: 天文攝影 Astrophotography
主題: Supernova SN2018ivc in M77 at Hokoon
回覆: 3
觀看: 91

Supernova SN2018ivc in M77 at Hokoon

Supernova SN2018ivc in M77 at Hokoon

Telescope: 50-cm RC reflector f/8
Camera: ASI1600MM Pro (uncooled), binned 3
south is up, east to the left
PTS
週四 06 12月, 2018 10:49
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on 2019 January 22
回覆: 0
觀看: 22

Asteroid occultation event on 2019 January 22

Asteroid occultation event on 2019 January 22 I've prepared finder charts from: Digital Sky Survey (15 x 15 arcmin and 30 x 30 arcmin) and The Sky 6 (15x11 arcmin) IOTA/IOTA-ES occultation update for (2) Pallas / UCAC4-432-057458 event on 2019 Jan 22, 21:34 UT Visible from SE Asia Summary ------- On...
PTS
週四 06 12月, 2018 09:34
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on 2019 January 20
回覆: 1
觀看: 39

Asteroid occultation event on 2019 January 20

Asteroid occultation event on 2019 January 20 I've prepared finder charts from: Digital Sky Survey (15 x 15 arcmin) and The Sky 6 (15x11 arcmin) IOTA/IOTA-ES occultation update for (671) Carnegia / UCAC4-623-036921 event on 2019 Jan 20, 20:38 UT Visible from China, SW Asia, Africa Summary ------- On...
PTS
週四 06 12月, 2018 09:08
版面: 業餘天文研究專區 Amateur Astronomers' Research Area
主題: Asteroid occultation event on 2019 January 12
回覆: 1
觀看: 25

Asteroid occultation event on 2019 January 12

Asteroid occultation event on 2019 January 12 I've prepared finder charts from: Digital Sky Survey (15 x 15 arcmin) and The Sky 6 (15x11 arcmin) IOTA/IOTA-ES occultation update for (1603) Neva / TYC 1334-846-1 event on 2019 Jan 12, 17:43 UT Visible from China, Russia, Europe Summary ------- On 2019 ...
PTS
週六 01 12月, 2018 00:43
版面: 天文攝影 Astrophotography
主題: Supernova SN2018ivc in M77 at Hokoon
回覆: 2
觀看: 182

Supernova SN2018ivc in M77 at Hokoon

Supernova SN2018ivc in M77 at Hokoon While the sky was nearly 99% covered by slow-moving clouds, cracks appeared from time to time. I decided to image at 1 frame every 8 seconds. This was to take care of the 2-4 second exposures. As such, only a handful of the ~450 images taken between 12:04 - 13:23...
PTS
週五 30 11月, 2018 09:25
版面: 天文攝影 Astrophotography
主題: 2018 Nov 29 - Observation at Hokoon
回覆: 2
觀看: 130

2018 Nov 29 - Observation at Hokoon

2018 Nov 29 - Observation at Hokoon Together with Thomas Fok, planned observation of the 3 comets failed miserably. While stars down to 15th magnitude were recorded, there is no trace of 64P nor 46P in the images. Despite the bad seeing, a few images of Mars, Uranus and Neptune, together with satell...
PTS
週五 30 11月, 2018 09:22
版面: 談天說地 Chatting Square
主題: 劫後重生
回覆: 3
觀看: 150

劫後重生

劫後重生
PTS
週三 28 11月, 2018 20:34
版面: FAQ 天文
主題: 改機一問
回覆: 12
觀看: 467

Re: 改機一問

clover 寫:
週三 28 11月, 2018 15:57
重有COMS既pixel大細,感光能力都有影響~
This cannot be modified
PTS
週三 28 11月, 2018 10:18
版面: FAQ 天文
主題: 改機一問
回覆: 12
觀看: 467

Re: 改機一問

bbyaya 寫:
週三 28 11月, 2018 09:24
改了機只是影多了 H alpha 紅色波長的影像, 如不是那波長, 改不改機是沒有關係的.
即是所有相機都影到 M45, M31, M101, M51 這類不是紅色星雲的天體.
不是紅色 does not mean there is no H-alpha, which is the most important wavelength in astronomy. When H-alpha is included, you will see red in these objects.
PTS
週六 24 11月, 2018 15:16
版面: FAQ 天文
主題: 改機一問
回覆: 12
觀看: 467

Re: 改機一問

請教各C兄,相機改機後,感光元件的感光度會否上升? What camera? How is it to be modified? For DSLR/mirrorless, there are basically 3 types of modifications: a. The cover IR cut filter is removed, or replaced by another filter that passes H-alpha. This modification will enhance the sensitivity for the h-alpha region, which ...

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