Search found 328 matches

by yltansg
Wed Sep 09, 2020 10:42 am
Forum: Astrophotography
Topic: Multi-Band High-resolution Solar Imaging
Replies: 1
Views: 71

Multi-Band High-resolution Solar Imaging

Hi, I have written an article on high-resolution solar imaging covering different wavelengths. It is a summary of about a decade of work. Glad that the European Physics Journal (EPJ) Web of Conferences published it. You can read it at: https://www.epj-conferences.org/articles/epjconf/abs/2020/16/epj...
by yltansg
Mon Jul 20, 2020 10:20 pm
Forum: Astrophotography
Topic: COMET NEOWISE
Replies: 2
Views: 178

COMET NEOWISE

Hi, Caught Comet NEOWISE this evening (20 July 2020) at 8:21 pm. It was at about 317deg Az, 5 deg Alt, soon after clouds cleared. https://1.bp.blogspot.com/-QKJDIxYBP_c/XxWiqs2b6LI/AAAAAAAArY0/u8a_kji_EI4eJy4YMczozrHBr2t23VNRwCLcBGAsYHQ/s640/neowise%2B20July2020.jpg The image was taken with a QHY5 P...
by yltansg
Sun Jul 12, 2020 5:30 pm
Forum: Buy and Sell
Topic: WTS: Vixen Synus 60L
Replies: 5
Views: 1039

Re: WTS: Vixen Synus 60L

Hi NeoTerryJoe,

I am interested. Can call Nine8three6six132?

Alfred
by yltansg
Mon May 18, 2020 9:12 am
Forum: Astrophotography
Topic: High-resolution Imaging of Sun's Lower Atmosphere
Replies: 0
Views: 440

High-resolution Imaging of Sun's Lower Atmosphere

I believe this is the first time I am posting a high-resolution Calcium-K image of the Sun. The high-resolution Calcium image on the right shows an ultra-violet lower atmosphere of the sun illuminated by emission of Calcium atoms. https://1.bp.blogspot.com/-DuJp416mwfY/Xr-ZC2ai3CI/AAAAAAAAqew/Sj1UN4...
by yltansg
Tue Apr 28, 2020 9:09 pm
Forum: Buy and Sell
Topic: WTB : SXD or SXD2
Replies: 4
Views: 732

Re: Looking for Nex SXD for Vixen SXW

wucheeyiun wrote:
Fri Apr 24, 2020 9:54 pm
Dear all, by the way, i suspect my vixen SXW mount motor board is faulty.

Any one would know where to get a replacement board?

Best regards.
Hi CY,

PMed you.

alfred
by yltansg
Sun Jan 19, 2020 10:49 am
Forum: Astrophotography
Topic: High-resolution Solar Image using C11 + Quark
Replies: 0
Views: 954

High-resolution Solar Image using C11 + Quark

Previously, I have achieved good results in H-Alpha high-resolution solar imaging with a PST etalon-D-ERF on a C11. After 3 months of tinkering, I finally succeeded using a Daystar Quark with the same D-ERF- C11 setup. This is the setup: https://1.bp.blogspot.com/-ofe0I8eFQ00/XiOupsyZI4I/AAAAAAAAo8M...
by yltansg
Wed Nov 20, 2019 10:38 am
Forum: Astrophotography
Topic: Solar full disk and Hi-resolution collage
Replies: 3
Views: 881

Re: Solar full disk and Hi-resolution collage

Interesting, yltansg. First time I see this technique :) Hi Airconvent, I have not seen anyone in the world who has presented high-resolution zoom-in images of the Sun with respect to the corresponding solar full disk in 3-narrow band imaging. I feel that this manner of presentation helps the reade...
by yltansg
Tue Nov 19, 2019 7:56 pm
Forum: Astrophotography
Topic: Solar full disk and Hi-resolution collage
Replies: 3
Views: 881

Solar full disk and Hi-resolution collage

This collage of solar full-disk images in white light, CAK and H-Alpha wavelengths with correspondingly high-resolution images of the region near the plage allows us to peer at the details of surface, lower atmosphere and upper atmosphere of the Sun. Equipment used include William Optics Megrez 90 r...
by yltansg
Fri Oct 04, 2019 10:02 pm
Forum: Astrophotography
Topic: Electronically-Assisted Astronomy - Some familiar DSOs
Replies: 2
Views: 1115

Re: Electronically-Assisted Astronomy - Some familiar DSOs

Thanks, Sentinel.

I used a ASI224MC with a Televue 0.8 reducer.

Alfred