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- 週三 13 7月, 2005 23:02
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Turned-Down Edge?
- 回覆: 14
- 觀看: 8626
- 週三 13 7月, 2005 22:06
- 版面: 天文攝影 Astrophotography
- 主題: Australia Trip Photos
- 回覆: 16
- 觀看: 7380
- 週三 13 7月, 2005 22:01
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Turned-Down Edge?
- 回覆: 14
- 觀看: 8626
- 週三 13 7月, 2005 21:58
- 版面: 天文攝影 Astrophotography
- 主題: More Photos
- 回覆: 1
- 觀看: 1629
More Photos
don know why 2 photos are missing. ...
Unfortunately, the fujipress 800 is less sensitive to HII emission as it used to be.... I will develop other large format film soon, E200 should perform well in this area but the speed is slower though. However , I don have scanner for 67 film....
Unfortunately, the fujipress 800 is less sensitive to HII emission as it used to be.... I will develop other large format film soon, E200 should perform well in this area but the speed is slower though. However , I don have scanner for 67 film....
- 週三 13 7月, 2005 21:52
- 版面: 天文攝影 Astrophotography
- 主題: Australia Trip Photos
- 回覆: 16
- 觀看: 7380
Australia Trip Photos
HI Pls take a look of my photos taken at Aussie. Mount : Vixen GPD Guiding : VIxen 80s (F5)+ 2.8X barlow + astro 6mm gudiing eyepiece. Film : Fujipress 800 Camera : Manual Nikkormat 1) Omega - 20 mins (Pentax 100 SDUFII , 400mm F4) 2) M83 - 20 mins (Same) - out focus 3) Tarantula Nebula -LMC - 10 mi...
- 週三 13 7月, 2005 21:30
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Turned-Down Edge?
- 回覆: 14
- 觀看: 8626
Turned-Down Edge?
Hi
Just back to HK and has to resume the polishing (finished 3 hrs). V. happy to see that other classmates has complete their telescope. Is my mirror turned-down edge and how to correct it? The r-test image is in front of focus.
Best Regards,
Ben
Just back to HK and has to resume the polishing (finished 3 hrs). V. happy to see that other classmates has complete their telescope. Is my mirror turned-down edge and how to correct it? The r-test image is in front of focus.
Best Regards,
Ben
- 週二 28 6月, 2005 23:44
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: 拋光問題
- 回覆: 148
- 觀看: 54001
- 週二 28 6月, 2005 22:55
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: 拋光問題
- 回覆: 148
- 觀看: 54001
- 週一 27 6月, 2005 12:24
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Photo of my mirror through diffraction grating.
- 回覆: 23
- 觀看: 9972
- 週日 26 6月, 2005 22:33
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Photo of my mirror through diffraction grating.
- 回覆: 23
- 觀看: 9972
Photo of my mirror through diffraction grating.
Hi all Attached is the photo taken today at Space Museum. My mirror has 51cm(F 4.25) focal length and just finished 1.5 hr polishing . The photo was taken beyond focus. Seems it is on the right track. I would like to thanks Wong Sir and all other tutors who taught me a lot during the class and they ...
- 週二 14 6月, 2005 23:20
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Damaged the main mirror
- 回覆: 8
- 觀看: 5019
- 週二 14 6月, 2005 23:15
- 版面: 自製天文望遠鏡 Amateur Telescope Making
- 主題: Damaged the main mirror
- 回覆: 8
- 觀看: 5019
Damaged the main mirror
Hi all
I accidentally damaged the mirror. What should I do? I am now polishing the mirrror with No. 220 "sand"....Pls. take a look at my photo.
I accidentally damaged the mirror. What should I do? I am now polishing the mirrror with No. 220 "sand"....Pls. take a look at my photo.