Search found 730 matches

by hhzhang
Thu Aug 13, 2020 1:30 pm
Forum: Astrophotography
Topic: Annoying dark bands in astrophotos from Canon M50
Replies: 2
Views: 2705

Annoying dark bands in astrophotos from Canon M50

I noticed something like a narrow darken bar overlay in my stacked photos. At home I took dark frames, dark flat frames, flat frames and bias frames. After applying these frames to stacking, the dark bar overlay just did not go away. I then set to investigate it to understand what went wrong. In my ...
by hhzhang
Thu Aug 13, 2020 10:53 am
Forum: Astrophotography
Topic: How precious are clear night skies in Singapore?
Replies: 2
Views: 5160

How precious are clear night skies in Singapore?

I had never been so interested in (somewhat obsessed with) clear night skies. When I started taking long exposure pictures of the stars in late Jan this year and then enjoyed a stretch of nice nights in Feb till March, I did not know that, over the following months from April to now in August, clear...
by hhzhang
Thu Aug 13, 2020 10:08 am
Forum: Astrophotography
Topic: The Andromeda Galaxy M31
Replies: 3
Views: 1868

Re: The Andromeda Galaxy M31

Nice shot! The outer spiral arms are difficult to capture under the bright sky glow in Singapore.
by hhzhang
Mon Aug 10, 2020 1:19 pm
Forum: Astrophotography
Topic: Two sleepless nights
Replies: 3
Views: 1614

Re: Two sleepless nights

Lessons learnt about the importance of proper processes for flat and dark frames. Many frames see little values. Removing light pollution gradient is still an art to learn. Additional two pictures. The milky way central region. Worthwhile another more serious attempt. https://lh3.googleusercontent.c...
by hhzhang
Mon Aug 10, 2020 12:29 am
Forum: Astrophotography
Topic: Two sleepless nights
Replies: 3
Views: 1614

Two sleepless nights

Two clear sky nights. Time well spent learning astrophotography. The moon is annoying for deep skys but on the other hand always the easiest target for high resolution imaging. https://lh3.googleusercontent.com/pw/ACtC-3e8O4Io0z6jgo6m0ExM0NjxL5o19apCl6AE7ohdSpac64M6ZuCFzI4SZBL37eydN0EjKClQLwyLwxrpU2...
by hhzhang
Sun Aug 09, 2020 4:33 pm
Forum: Astrophotography
Topic: Lagoon Nebula M8 and Trifid Nebula M20
Replies: 4
Views: 3137

Re: Lagoon Nebula M8 and Trifid Nebula M20

Our dear galactic centre region. Amazing shot from the poor light pollution situation here.
by hhzhang
Sat Aug 01, 2020 10:26 am
Forum: Astrophotography
Topic: M4 in Scorpius
Replies: 5
Views: 3540

Re: M4 in Scorpius

Beautiful!
by hhzhang
Sat Aug 01, 2020 10:23 am
Forum: Astrophotography
Topic: 2020-Jul-30 Neowise and Moon
Replies: 2
Views: 2812

Re: 2020-Jul-30 Neowise and Moon

Airconvent wrote: Fri Jul 31, 2020 3:30 pm hhzhang
You managed to catch it..Nice! :)
Wish for a better sky the next few nights and will see if can capture any tails image.
by hhzhang
Fri Jul 31, 2020 1:04 am
Forum: Astrophotography
Topic: 2020-Jul-30 Neowise and Moon
Replies: 2
Views: 2812

2020-Jul-30 Neowise and Moon

Finally caught a glimpse of the fading great comet of Neowise. Through the eyepiece, it was nothing but a featureless fuzzy blob with distinctive aqua color. https://lh3.googleusercontent.com/pw/ACtC-3eMoTTWZKDNId2WoOb8jKrvoTv6jSPi_Wjl6LAqHtX576SLrs4s7RW3LRho9W9LvqB_SxYDVwJ-8pwJPsGK3WKYAzDS5zctVVZg6...
by hhzhang
Sat Jul 25, 2020 10:01 pm
Forum: Beginners Forums
Topic: Naked-eye Galaxy Nova (AAVSO Alert Notice 711)
Replies: 1
Views: 11247

Re: Naked-eye Galaxy Nova (AAVSO Alert Notice 711)

This early morning ~6AM caught a glimpse of this galaxy nova. Through binocular it looked just shy of the brightness of a nearby mag6.0 star. CCD photometry gave an estimate of mag 6.3. https://lh3.googleusercontent.com/pw/ACtC-3evmD2lIqIXpNAn_ucsjftWKRBXQ_DXWdXGeQAVRlu3-n4yNaTZ2jc149MYD19L7vvJQzMpB...