香港天文論壇

continue work harder and a late nite la... thank you.

V. cold ah.... I spent 3 hrs for polar alignment at 1 st night.... and also travel a long way to destination, more people /drivers will be better...

How to correct ah? I has reduce the amplitude but seems no use at all....I think I should continue to polish for a couple of hrs and deal with it later as Wah said

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....

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...

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

Oh, I see . Thank you. But it really looks like biscuits.....

I did see the image but much dimmer than in Space Museum.....

One question, I wash both the primary and the butmen mould after polishing and put them apart if I am not going to polish for a few days ? Or should I put some "polishing powder solution" between them for storage?

I see.

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 ...

Used up all my "sand" . Need to work harder this Sunday at Space Museum..... Seems that I can't go to No. 320 ...

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.