香港天文論壇

Very good image!!! Very clear!!! High res!
For the last one, 041111_120mm_Sunspot696_2X_1003frs_PS_02.jpg, I think the stacking got slight problem, double image found.

Don't!
Got to take some final widefield in HK asap!!!

Oh! I guess it is water mouth!!!

The color and composition of the photo is nice! Great widefield shot. Add oil!
I also want to know where is this location?

Thanks Subaru!!! I will try my little gem C5 + 0.63 x reducer next time. :) The reason why i used 80 mm was because it has a smaller f-number, which let me do shorter exposure (higher possibility of success as I am a real beginner. :)) By the way, I do not know much about the 0.63 reducer even I got...

dobs! exactly from this person! I only found his photos in the in the yahoo 80mmf5 egroup. Thanks a lot!!! That is a good reference!!!

Thanks for the comments. :) I think c80wa is really a low cost beginner scope not only for visual but also for astrophotography. I was inspired by a person in Chile who used this scope and produced bunge of great photos! Initially I bought that for guidescope of C5, but I think i will use that more....

Very subtle Horsehead and Flame nebula taken on 2004/10/18 at Pak Tam Chung Almost couldn't see lar. Image taken on 2004/10/18 night at Pak Tam Chung Telescope : Celestron c80wa refractor Mount : Modified Zhitong EQ4 Guiding : C5 guidescope + DIY Autoguider with software Startrack Camera / Film : Ni...

Images taken on 2004/10/18 night at Pak Tam Chung
Telescope : Celestron c80wa refractor
Mount : Modified Zhitong EQ4
Guiding : C5 guidescope + DIY Autoguider with software Startrack
Camera / Film : Nikon FM2 / Fuji Press 800
Exposure : 3 x 15 ~ 20 mins

M45 Please comment.

Image taken on 2004/10/18 night at Pak Tam Chung
Telescope : Celestron c80wa refractor
Mount : Modified Zhitong EQ4
Guiding : C5 guidescope + DIY Autoguider with software Startrack
Camera / Film : Nikon FM2 / Fuji Press 800
Exposure : 20 mins + 5 mins

M42 Please comment.

My scanner film/slide lightbox recently broken. The fluorescene light tube seemed dimmed. It is surprisingly thin. The diameter just 2 mm, and length 30 cm. I was shocked that my desktop PC, it has some fancy decoration blue lamp inside, the size surprisingly identical to 2 mm diameter, and length 3...

Images taken on 2004/10/18 night at Pak Tam Chung Telescope : Celestron c80wa refractor Mount : Modified Zhitong EQ4 Guiding : C5 guidescope + DIY Autoguider with software Startrack Camera / Film : Nikon FM2 / Fuji Press 800 Exposure : ~ 20 mins Today obtained from film development lab., I found tha...

Wah! 寫:今晚唔錯,出洞吧!~

Hi, Joe, patiently waiting your comment.

Doucat and Wah!,
Very great photos.
Are those black lines resulted from dark frame subtraction? Why are lengthened?
Keep up the good work.
thanks
Elton

[glow=red]Congratulation![/glow] Wah! This is the first time i see this. Thanks Wah!