Transits of Mercury

mrngbss · Post by **mrngbss** » Sun Nov 05, 2006 9:37 pm

Nope. For an 8 inch scope, whether I put on an off-axis or remove it during viewing, the views are the same. Same image size.

jiahao1986 · Post by **jiahao1986** » Sun Nov 05, 2006 9:41 pm

Kim Miau,

If you need the filter very badly, I have a spare 8" full-aperture white light filter for our shool club's C8(under repair), and you can come to my place and borrow it before the transit, but do remember to return it, or else I will get killed...

Clear skies,
Jia Hao

Robin Lee · Post by **Robin Lee** » Sun Nov 05, 2006 9:43 pm

So when do we meet? It's around the corner.

What do you benefit and lose with the increased focal ratio?

jiahao1986 · Post by **jiahao1986** » Sun Nov 05, 2006 9:45 pm

Dimmer image, less resolution, however, when the sun is so low, you simply can't expect to use too much power. The filter I have is a full-aperture one.

jiahao1986 · Post by **jiahao1986** » Sun Nov 05, 2006 9:47 pm

Do you know how to get to NTU? For me the exam is close and I can't spare much time going out of school...

mrngbss · Post by **mrngbss** » Sun Nov 05, 2006 9:51 pm

jiahao1986 wrote:Do you know how to get to NTU? For me the exam is close and I can't spare much time going out of school...

I think Robin stays in Malaysia..

jiahao1986 · Post by **jiahao1986** » Sun Nov 05, 2006 9:53 pm

mrngbss wrote:
jiahao1986 wrote:Do you know how to get to NTU? For me the exam is close and I can't spare much time going out of school...
I think Robin stays in Malaysia..

Well...bad news hah, so Robin, what's your opinion? Still come and borrow mine?

Robin Lee · Post by **Robin Lee** » Sun Nov 05, 2006 11:23 pm

I think I can get the Baader solar film and make one myself. Wee Nghee, are you free to get some for me? I think I will try my best to make a full aperture filter. By the way, is it necessary to have such a large filter for the brightest object on our sky?

*What's the preposition for sky?

sforce21 · Post by **sforce21** » Mon Nov 06, 2006 10:02 pm

hey, i got a bit mixed up by the time given by NASA. Is it on wed morning or thurs morning?

mrngbss · Post by **mrngbss** » Mon Nov 06, 2006 10:10 pm

I've used Starry Night to check. From our location, it is on 9th Nov, 315am until 8am. Realistic time for us is about 7am.

In US, it starts from 215pm till 7pm.

more info: http://www.space.com/php/multimedia/ima ... +8%2C+2006.

Can some expert check for me as well...? Thanks!