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LT
週二 02 3月, 2021 19:27
版面: 自製天文儀器 diy Astro Equipment
主題: 東山復出 -- 7.5" brass worm gears, 359 teeth
回覆: 6
觀看: 211

Re: 東山復出 -- 7.5" brass worm gears, 359 teeth

除了這 2 套合金鋁材蝸輪外,本人還有 2 套 銅製 worm wheels,359 teeth,購自日本 NTK,好多人應該未聽過 NTK 這個品牌的赤道儀。

將會用這 4套 worm gears 製作 2台 赤道儀,一台長放 YL 老家與 12.5" 肥牛一同食草耕田。另一台出走 YL 與 13.1" 瘦牛齊齊晒星光。
Gear_2-sets.jpg
Gear_2-sets.jpg (660.1 KiB) 已瀏覽 5 次
LT
週一 01 3月, 2021 19:31
版面: 自製天文儀器 diy Astro Equipment
主題: 東山復出 -- 7.5" brass worm gears, 359 teeth
回覆: 6
觀看: 211

Re: 東山復出 -- 7.5" worm gears, 360 teeth

原來不知不覺已封印積塵近19年了,係時候要解除封印除塵。
Gears_G11.jpg
Gears_G11.jpg (600.09 KiB) 已瀏覽 52 次
LT
週五 26 2月, 2021 13:18
版面: 天文攝影 Astrophotography
主題: LT 的可保留相集 (海外編) -- Eta (wide field)
回覆: 2
觀看: 56

LT 的可保留相集 (海外編) -- Eta (wide field)

顧名思意,質素不算差,有得留低。

1. Eta (wide field)

Taken with EF100mm F2.8L + 100Da in Guyra in 2017 @F4
20x180s @iso800, unguided with Vixen AP photoguider
Stacked and processed in PI with dark calibrated only
Eta_20170416_EF100mmF4_100Da_iso1600_20x180s_Guyra.jpg
Eta_20170416_EF100mmF4_100Da_iso1600_20x180s_Guyra.jpg (1.02 MiB) 已瀏覽 56 次
LT
週一 22 2月, 2021 23:00
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- M35 taken in YL

105. M35

Taken with DIY 6" F4 Newtonian + Vixen corrector PH + LPS + 100Da @YL on last Wednesday @570mm F3.8
30x90s @iso400, autoguided
Stacked in DSS with dark and flat calibrated
Processed in PI

A test to see the star qualtiy on an APS-C sensor.
M35_20210217_6F3-8_100Da_iso400_30x90s_YL.jpg
M35_20210217_6F3-8_100Da_iso400_30x90s_YL.jpg (994.57 KiB) 已瀏覽 83 次
LT
週一 22 2月, 2021 22:56
版面: 天文攝影 Astrophotography
主題: 懶人攝星集
回覆: 134
觀看: 24772

Re: 懶人攝星集

[Good Job]
LT
週一 22 2月, 2021 00:46
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- M42 in Ha channel

104. M42 in Ha channel Taken with DIY 6" F4 Newtonian + Vixen corrector PH + 1600MM @YL at 20210215 @570mm F3.8 Total integration time = 3x600s, 5x120s and 5x60s in Ha @7nm Stacked in DSS with darks calibrated only Pre-processed in PI and combined in PS using layers for HDR effect A test to see if m...
LT
週四 18 2月, 2021 13:04
版面: 自製天文儀器 diy Astro Equipment
主題: LT的 DIY 及 modified 天文器材配件相片集 -- adapters for coupling 1600MM on corrector PH
回覆: 36
觀看: 4029

Re: LT的 DIY 及 modified 天文器材配件相片集 -- adapters for coupling 1600MM on corrector PH

Finally finsihed the distance adjustment for 1600MM imaging gears onto Vixen corrector PH for F4 Newtonians. Now it will be quite convenient to switch camera from Canon EOS DSLRs into 1600MM cooled CMOS camera with or without filter wheel.
AD_corrPH.jpg
AD_corrPH.jpg (348.48 KiB) 已瀏覽 95 次
LT
週三 17 2月, 2021 19:40
版面: 天文攝影 Astrophotography
主題: Should use Ha or L channel ?
回覆: 3
觀看: 61

Should use Ha or L channel ?

The B&W version was taken in YL on Monday with my DIY 6" F4 Newtonian + Vixen corrector PH + 1600MM @570mm F3.8, single shot of 600s, auto level with STF in PI. The color version was taken in Taiwan with Vixen FL55SS + Vixen HD flattener + 100Da @314mm F5.7, single shot of 360s @iso1600. Level adjus...
LT
週二 16 2月, 2021 19:28
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- Monkey in Ha channel

103. Monkey nebula in Ha channel of 7nm vs 35nm Once took this object with Vixen R200SS in Ha channel @7nm some years ago in YL. Last night, imaged it again with a DIY 6" F4 Newtonian in Ha channel but @35nm bandwidth. Unfair to compare them, but maybe there is still something worthy for taking a lo...
LT
週五 12 2月, 2021 19:40
版面: 天文攝影 Astrophotography
主題: IR blocking filter necessary to 462C for deep sky imaging
回覆: 2
觀看: 198

IR blocking filter necessary to 462C for deep sky imaging

Quite sure you have no difficulty to guess out which one was imaged without an IR blocking filter mounted onto the camera. The FWHM values of these two sets of data measured by DSS are very close, mainly betwwen 4" and 5". Taken with DIY 6"F4 Newtonian + 462C in YL @600mm F4 100 x 25s, autoguided Fo...
LT
週三 10 2月, 2021 19:16
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- IC410 in Ha channel

102. IC410

Taken with Vixen R200SS + corrector PH + 1600MM @YL in 2018 @760mm F3.8
Ha = 8x360s, autoguided
Stacked in DSS with dark calibrated only
Processed in PI and PS
IC410_20181117_R200SS_corrPH_1600MM_Ha_8x360s_YL.jpg
IC410_20181117_R200SS_corrPH_1600MM_Ha_8x360s_YL.jpg (689.92 KiB) 已瀏覽 217 次
LT
週一 08 2月, 2021 22:18
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- M42 with 6" F4 newtonian

101. M42 again Taken with DIY 6" F4 Newtonian + Vixen corrector PH + LPS + 100Da @YL at 20210203 @570mm F3.8 27x120s @iso400, autoguided with Vixen AXJ mount Stacked in DSS with darks and a bad flat calibrated Processed in PI and PS Also attach one light frame for your reference. Just a test to see ...
LT
週一 08 2月, 2021 22:05
版面: 天文攝影 Astrophotography
主題: Eskimo Nebula 19 2 2021
回覆: 24
觀看: 852

Re: Horsehead, M42, and M35

[Good Job] [Good Job] [Good Job]
LT
週日 07 2月, 2021 22:49
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- M35 taken in YL
回覆: 267
觀看: 51022

Re: DSO 遺照集 -- Eskimo

100. Eskimo

Taken with DIY 6" F4 Newtonian + LPS +UV-IR + 462C yesterday evening in YL @600mm F4
100x25s, autoguided
Stacked in DSS with dark calibrated only
Processed in PI
FB_NGC2392_20210206_6F4_LPS_462C_100x25s_YL.jpg
FB_NGC2392_20210206_6F4_LPS_462C_100x25s_YL.jpg (657.89 KiB) 已瀏覽 95 次
LT
週六 30 1月, 2021 22:22
版面: 天文攝影 Astrophotography
主題: DSS vs PCC
回覆: 1
觀看: 228

Re: DSS vs PCC

Larger version:
FB_EF35mmF3-5_40Da_iso800_10x360s_Aus_DSS.jpg
FB_EF35mmF3-5_40Da_iso800_10x360s_Aus_DSS.jpg (1.37 MiB) 已瀏覽 227 次
FB_EF35mmF3-5_40Da_iso800_10x360s_Aus_PCC.jpg
FB_EF35mmF3-5_40Da_iso800_10x360s_Aus_PCC.jpg (1.24 MiB) 已瀏覽 227 次

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