有 2029 筆資料符合您搜尋的條件

LT
週六 14 3月, 2020 22:10
版面: 二手交易場 Second Hand Area
主題: Tak FSQ85 OTA for sale (SOLD)
回覆: 3
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Tak FSQ85 OTA for sale (SOLD)

代朋友放售 Tak FSQ85 OTA 一支,價錢 HK$14,000. OTA coming with all original accessories 6x30 finder, tube Rings, Vixen Style Dovetail Plate and original cardboard box 朋友很少使用,除了鏡片有少少塵粉 (見附件相片),鏡身條件極優。有意請貼文回覆,PM或 直接whatsApp本人。 謝謝。(朋友住港島區地鐵站附近) Baby-Q_OTA.jpg Condition_1.jpg Condition_2.jpg Condition_3.jpg Finde...
LT
週四 12 3月, 2020 23:59
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M45 with ED70SS from PTC

35. M45 with ED70SS from PTC

Same setup as image #33 but taken @PTC. Due to less light pollution than that @TMS, sn ratio is a little bit better and a little bit more of nebulosity could be captured.

15x240s @iso800 taken in 2010.
M45_20101230_ED70SS_300Da_iso800_15x240s_PTC.jpg
M45_20101230_ED70SS_300Da_iso800_15x240s_PTC.jpg (1.25 MiB) 已瀏覽 5724 次
LT
週二 10 3月, 2020 23:36
版面: 自製天文望遠鏡 Amateur Telescope Making
主題: DIY 42mm star finder
回覆: 2
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DIY 42mm star finder

儀器太多,閒置時間 >> 使用時間;又隨處亂放不理,結果發了霉,變成垃圾。唯有廢物recycle,砌成一支暗視夜照明的42mm star finder。
DIY_finder.jpg
DIY_finder.jpg (275.59 KiB) 已瀏覽 3253 次
LT
週二 10 3月, 2020 23:05
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M45 with ED70SS from TMS

34. M45 with ED70SS from TMS

Taken with Vixen ED70SS + flattener + LPS + 300Da @TMS in 2011 @400mm F5.7
9x180s @iso800, autoguided
No dark, flat and bias calibrated in DSS
M45_20111022_ED70SS_300Da_iso800_9x180s_TMS.jpg
M45_20111022_ED70SS_300Da_iso800_9x180s_TMS.jpg (1.25 MiB) 已瀏覽 5784 次
LT
週二 03 3月, 2020 23:21
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
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Re: DSO 遺照集 -- M42 with ED70SS from PTC

33. M42 with ED70SS from PTC

Taken in 2010 with same setup as Image 31 but at PTC. Due to less light pollution than that in TMS, a little bit more detail was captured.
15x300s @iso800
M42_20101228_ED70SS_300Da_iso800_15x300s_PTC.jpg
M42_20101228_ED70SS_300Da_iso800_15x300s_PTC.jpg (829.06 KiB) 已瀏覽 5905 次
LT
週一 02 3月, 2020 21:58
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M42 with ED70SS from TMS

32. M42 with ED70SS

Taken with Vixen ED70SS + flattener + LPS + 300Da @TMS in 2011 @392mm F5.6
24x210s @iso400, autoguided

Maybe one of the best shot of M42 from TMS. However, it is seemed a little bit of extra stress on the objective.
M42_20110123_ED70SS_300Da_iso400_24x210s_TMS.jpg
M42_20110123_ED70SS_300Da_iso400_24x210s_TMS.jpg (1.22 MiB) 已瀏覽 5924 次
LT
週日 01 3月, 2020 09:58
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
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Re: DSO 遺照集 -- M42 in Ha channel from YL

31. M31 with 6" F4 newtonian A rush test on the Newtonian to see how fast it would be for deep sky imaging in PTC N years ago when the assembly of this scope was completed, and so no doing a serious collimation on the optical axis. 10x240s @iso1600 with 6" F4 newtonian + MPCC + 40Da, autoguided with...
LT
週五 28 2月, 2020 22:18
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M45 with 6 inch Newtonian from TMS

30. M42 in Ha channel from YL When the object was taken, it had gone down less than 40 degrees above west horizon. Transparency was quite low that the Orion constellation looked quite dim in the sky. Taken with 6" F4 Newtonian + Vixen 0.95x corrector PH + 35nm Ha filter + 1600 mono at my YL old home...
LT
週二 25 2月, 2020 22:56
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M45 with 6 inch Newtonian from TMS

29. M45 with 6" F5 Newtonian from TMS Taken with 6" F5 Newtonian + MPCC + LPS + 300Da from TMS in 2011 @750mm F5 13x120s @iso1600, autoguided with SXD mount To shoot this object, 750mm focal length is too long to an APS-C sized sensor. 500mm should be just fine. M45_20111021_6F5_300Da_iso1600_13x120...
LT
週一 24 2月, 2020 22:54
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- Witch broom with DED108SS from PTC

28. Witch's broom

Taken with DED108SS film astrograph + LPS + 300Da @PTC in 2008 @540mm F5
5x180s @iso1600 w/o darks, bias, flats calibrated in DSS
Veil_20081031_DED108S_300Da_iso1600_5x180s_PTC.jpg
Veil_20081031_DED108S_300Da_iso1600_5x180s_PTC.jpg (1.17 MiB) 已瀏覽 4564 次
LT
週日 23 2月, 2020 22:53
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M51 with ED115S from TMS

27. M51 wth ED115S

5x180s + 4x240s @iso400, autoguided with SXD mount
Taken with Vixen ED115S apo refractor + 300Da in TMS in 2009 @885mm F7.7 under moon light
M51_20090514_ED115S_300Da_iso400_31min_TMS.jpg
M51_20090514_ED115S_300Da_iso400_31min_TMS.jpg (441.36 KiB) 已瀏覽 4580 次
LT
週六 22 2月, 2020 09:59
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- M42 with 6" newtonian

26. M42 Taken with DIY 6" F5 Newtonian + MPCC + LPS + 300Da @PTC in 2009 @750mm F5 4x240s @iso400, autoguided with SXD mount If interested, you may compare this image with those taken with other 6" Newtonians + different coma correctors. Vixen's corrector PH on 6" F4 is the best, then Paracorr while...
LT
週五 21 2月, 2020 22:02
版面: 天文攝影 Astrophotography
主題: Test shot from last night with 6" F4 newtonian
回覆: 2
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Re: Test shot from last night

Another test shot from last night in YL 11x45s @iso400 stacked in DSS without any calibration Taken with 6" F4 Newtonian + Vixen 0.95x corrector PH + 100Da @580mm F3.8 Autoguided with Vixen AP-WM mount Most probably that 6" newtonian will be brought down south for astronomy soon. M42_6F4_Coma-PH_100...
LT
週三 19 2月, 2020 19:19
版面: 天文攝影 Astrophotography
主題: Test shot from last night with 6" F4 newtonian
回覆: 2
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Test shot from last night with 6" F4 newtonian

The focal ratio of a 6" F4 newtonian + Vixen 1.4x extender PH = 6" F5 newtonian + TV paracorr. Maybe I will go to PTC to shoot DSOs with both newtonians at the same time. So last night staying at my YL old home to test how this TV paracorr (film stage) works with a 6" F5 newtonian on correcting the ...
LT
週一 17 2月, 2020 23:57
版面: 天文攝影 Astrophotography
主題: DSO 遺照集 -- Crab taken with 30cm newtonian
回覆: 162
觀看: 33746

Re: DSO 遺照集 -- Eagle from YL posted on Feb 17th

25. Eagle Taken with Vixen AX103S + 300Da in YL in 2011 @824mm F8 12x300s @iso400 AX103S is an excellent astrograph from Vixen and can support FF sensors. Optics is in 2 groups of a triplet objective and one-element flattener at the focuser end. However, the focal ratio is 8, maybe a bit too low for...

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