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LT
週日 27 10月, 2019 00:20
版面: 天文攝影 Astrophotography
主題: Try processing milky way image not so highly seasoned
回覆: 1
觀看: 114

Try processing milky way image not so highly seasoned

Taken with unmodified 100D + EF24-105mm F4L zoom lens @24mm F4 in Gladstone in 2014
Single shot of 120s @iso3200, tracked with Vixen star tracker Polarie @0.5x sidereal speed
20140829_24mmF4_iso3200_120s_0-5x_ICNR_PS.jpg
20140829_24mmF4_iso3200_120s_0-5x_ICNR_PS.jpg (1000.09 KiB) 已瀏覽 114 次
LT
週三 23 10月, 2019 12:35
版面: 天文攝影 Astrophotography
主題: 試新方法
回覆: 2
觀看: 181

試新方法

Taken with EF75-300mm L zoom lens + modd 5DmkII + Vixen AP photo guider in 2016 in Darwin district @300mm F5.6 18x240s @iso800, air temperature > 30C 用Canon的DPP將單張RAW轉換成TIFF,出來的顏色頗"豐富"和吸睛。所疊的影像用PI中的PCC來做color calibration,出來的顏色,主觀上仍覺有點怪怪和不足,所以試試新方法看看效果怎樣。假設: 1. 若以RAW拍攝,R,G,B三色會以線性形式記錄下來; 2. 若用Canon的D...
LT
週一 07 10月, 2019 19:48
版面: 天文攝影 Astrophotography
主題: Eta taken in NZ last year
回覆: 5
觀看: 437

Eta taken in NZ last year

Taken with Vixen ED81SII apo + SD reducer kit + 3.8 micron cooled cmos camera + AP non-goto mount @人肉 goto mode R=G=B=6x180s @-15C with bias, darks and flats calibrated in PI @495mm F6.1 Data captured with SGPro in NZ in 2018 @ very windy condition ocassionally Color calibrated with PCC in PI. If PC...
LT
週四 03 10月, 2019 00:12
版面: 天文攝影 Astrophotography
主題: M27 from PTC
回覆: 6
觀看: 431

Re: M27 (2 night data combined )

Final product, combined data obtained from 2 nights @PTC and TMS separately. All data taken with Vixen AP non-goto mount + ED81SII apo + HD flattener @640mm, F7.9 R=G=B=6x300s(PTC)+5x300(TMS) @-10C, with bias and darks calibrated in PI SNR still very low due to too much pollutant in the air and M27 ...
LT
週三 02 10月, 2019 19:52
版面: 天文攝影 Astrophotography
主題: M27 from PTC
回覆: 6
觀看: 431

Re: M27 from PTC and TMS (last night)

Had an idea on how to reduce the impact of light pollution on imaging deep sky objects and so went out to PTC on last Friday night to take a trial. But it was a bit late to get there. Not much time to take data. Moreover, the transparency was low too. Taken with ED81SII apo + flattener HR + 1600 MM...
LT
週三 02 10月, 2019 19:51
版面: 天文攝影 Astrophotography
主題: M27 from PTC
回覆: 6
觀看: 431

Re: M27 from PTC and TMS (last night)

Taken with Vixen AP mount + ED81SII APO + HD flattener again last night but at TMS.

R=G=B=5x300s with bias and dark calibrated in PI, autoguided.

The sky was so hazy that the polaris could only barely seen with naked eye!!!!
M27_DBE_PCC_PI.jpg
M27_DBE_PCC_PI.jpg (1.04 MiB) 已瀏覽 345 次
LT
週日 29 9月, 2019 01:07
版面: 天文攝影 Astrophotography
主題: M27 from PTC
回覆: 6
觀看: 431

M27 from PTC

Had an idea on how to reduce the impact of light pollution on imaging deep sky objects and so went out to PTC on last Friday night to take a trial. But it was a bit late to get there. Not much time to take data. Moreover, the transparency was low too. Taken with ED81SII apo + flattener HR + 1600 MM-...
LT
週二 24 9月, 2019 10:59
版面: 天文攝影 Astrophotography
主題: Final play on M27 taken with 6"F4 newtonian
回覆: 2
觀看: 199

Final play on M27 taken with 6"F4 newtonian

Use my own way to blend Ha data on L channel taken with 1600 MM-C and R channel taken with 100Da. Of course not a correct method of merging narrow band data, and so the final image may look a bit weird L=27x45s, Ha=4x240s, 100Da=5x60s, without any calibration in DSS All taken with AP mount + 6"F4 ne...
LT
週一 23 9月, 2019 21:29
版面: 天文攝影 Astrophotography
主題: M27 in Ha channel
回覆: 3
觀看: 377

M27 in Ha channel

人肉 goto

DIY 6"F4 牛牛 + Vixen 1.4x extender PH + 1600 MM-C @840mm F5.6 in YL last night
Ha = 4x240s without any calibration in DSS
Autoguiding: Vixen non-goto AP mount + 4cm guiding scope + QHY5LII-M + PHD2 with breeze occassionally
M27_crop_Ha_4x240s_YL.jpg
M27_crop_Ha_4x240s_YL.jpg (480.36 KiB) 已瀏覽 377 次
LT
週一 23 9月, 2019 08:36
版面: 天文攝影 Astrophotography
主題: One minute M27 taken with my DIY 6" F4
回覆: 1
觀看: 271

One minute M27 taken with my DIY 6" F4

Seems Vixen new 1.4x extender for R200SS newtonians work quite well with my DIY 6" F4 travel newt.

Taken with 100Da @TMS on September 20th @840mm F5.6
5x60s @iso800
Autoguiding with AP mount + 4cm guiding scope + QHYL-IIM + PHD2
M27_crop_DBC_CC_Jpeg.jpg
M27_crop_DBC_CC_Jpeg.jpg (908.94 KiB) 已瀏覽 271 次
LT
週二 17 9月, 2019 21:51
版面: 天文攝影 Astrophotography
主題: Eskimo
回覆: 4
觀看: 215

Eskimo

If photographic focal length is not longer than 3000m + seeing is not so stable, don't attempt to take this object.

Taken in 2013 with VC200L + reducer + 100Da @PTC
6x240s @iso800
Autoguided with SX2 mount + 5cm guiding scope + 2x + QHY5 + PHD
Light_crop.jpg
Light_crop.jpg (396.17 KiB) 已瀏覽 214 次
LT
週一 16 9月, 2019 22:14
版面: 天文攝影 Astrophotography
主題: M45 taken with my DIY 6" F4 newtonian
回覆: 2
觀看: 160

M45 taken with my DIY 6" F4 newtonian

Except mirrors, all were made by me. However, the original OTA is still too bulky to be transported to overseas for astronomy. Moreover, the MPCC3 doesn't correct the coma aberration so well. So, I need to rebuild the OTA and tailor make a focuser for installing Vixen's corrector PH and 1.4x extende...
LT
週一 16 9月, 2019 11:14
版面: 天文攝影 Astrophotography
主題: M57 taken with VC200L in 2015
回覆: 2
觀看: 160

M57 taken with VC200L in 2015

If Vixen VC200L is well collimated, it will be a good killer on imaging small deep sky objects. If the spider structure and tubing design, mainly interior, the bright star will display much beautiful on screen. I will re-construct my VC200L after finishing my 6" F4 travel newt. Single frame taken in...
LT
週二 10 9月, 2019 11:32
版面: 天文攝影 Astrophotography
主題: 3 DSOs taken with automated Vixen AP mount
回覆: 0
觀看: 183

3 DSOs taken with automated Vixen AP mount

*** Due to the image can only be viewed after logging in on the sub-page of "TATScope", I repost this thread on this sub-page. Moderator please delete it on "TATscope" sub-page, if no double posting is allowed. Thank you very much. *** DIY an adapter for the connection between Vixen AP mount and Sta...
LT
週二 10 9月, 2019 11:19
版面: 達氏望遠鏡
主題: 3 DSOs taken with automated Vixen AP mount
回覆: 1
觀看: 208

3 DSOs taken with automated Vixen AP mount

DIY an adapter for the connection between Vixen AP mount and Star Book Ten controller so that the AP mount can run goto function for either visual or imaging purpose. Finally had time to test it on last Sat evening, though big gibbous moon still high in the sky. This three objects were imaged with a...

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