www.astrocafe.hk

An ex-student wants to see the sun in H-alpha. So I took out my only equipment for this purpose: LS152T. The beauty of LS152T is that it is probably the largest portable h-alpha telescope in the market. I carried this with one hand and a small azimuthal mount with another hand to my car. I parked my car on a quiet road and set up the scope. We started observing within one minute!

When I looked into the Lunt zoom eyepiece, a huge prominence greeted me in all its glory. Like a fountain of fire standing proud on the solar surface, it transformed from a dark filament on the solar disk to a bright prominence beyond the edge of the sun. On the opposite end of the sun was two departing sunspots, with a nice prominence emerging from them.

I took out my new 6mm Ethos to receive its first light. At 150x, the details shown by the huge filaprom were fantastic!

傳統觀念是太陽觀測有點像行星月面，跟超廣角目鏡沾不上邊，而且在Ha觀測倍率根本也不會高到那裡去。

但當口徑到了100、152甚至160時，我發現用Ethos推上100倍觀看全日面，效果特別好的：
viewtopic.php?f=19&t=316

David 的情況如何?

David 寫:An ex-student wants to see the sun in H-alpha. So I took out my only equipment for this purpose: LS152T. The beauty of LS152T is that it is probably the largest portable h-alpha telescope in the market. I carried this with one hand and a small azimuthal mount with another hand to my car. I parked my car on a quiet road and set up the scope. We started observing within one minute!

When I looked into the Lunt zoom eyepiece, a huge prominence greeted me in all its glory. Like a fountain of fire standing proud on the solar surface, it transformed from a dark filament on the solar disk to a bright prominence beyond the edge of the sun. On the opposite end of the sun was two departing sunspots, with a nice prominence emerging from them.

I took out my new 6mm Ethos to receive its first light. At 150x, the details shown by the huge filaprom were fantastic!

Great1! 150X! Let me try my TV 2-4mm on LS80T. Perhaps comparable magnification, but poor FOV.

I'd love to know about the view from this combo.

"YY"中...
不知這樣會不會已經過重而影響調焦的流暢度？

不會，因為Feather Touch 是市面上最穏最順滑的手動調焦筒。

自數年前中了毒後，至今我的個人器材已有好幾個3.5", 2.5", 2.0" 型號了，也有三套電子裝置。

目視太陽，2.0"型號可以了，若要目視深空等，最好用上2.5"，若要用到全片幅拍攝，3.5"會較合適。

David 寫:When I looked into the Lunt zoom eyepiece, a huge prominence greeted me in all its glory. Like a fountain of fire standing proud on the solar surface, it transformed from a dark filament on the solar disk to a bright prominence beyond the edge of the sun. On the opposite end of the sun was two departing sunspots, with a nice prominence emerging from them.

Now I know why the view was brilliant. I was watching a double-eruption in progress !
http://www.spaceweather.com/images2011/ ... 3mhc3rvfp2

David 寫:Now I know why the view was brilliant. I was watching a double-eruption in progress !
http://www.spaceweather.com/images2011/ ... 3mhc3rvfp2

when you called me yesterday I was running a function, otherwise I will pull out my LS75F immediately