Search found 96 matches

by joachim.ong
Sun Aug 27, 2023 8:48 pm
Forum: Beginners Forums
Topic: What power supply do you use to power your rig?
Replies: 10
Views: 6704

Re: What power supply do you use to power your rig?

Looking around for LiFePO4 batteries preferably from local vendor for safety... probably don't need such a large capacity either. Any suggestions?
by joachim.ong
Thu Aug 10, 2023 9:23 pm
Forum: General Astronomy
Topic: How do Dobs/Newtonians fare in singapore light polluted skies
Replies: 6
Views: 7522

Re: How do Dobs/Newtonians fare in singapore light polluted skies

Making sure stray lights don't enter the scope should be the top priority. If that means you need to walk a little, a lighter scope might be better. Get a trolley too, if you have space at home you can leave the dob on it all ready to go.
by joachim.ong
Tue Jul 25, 2023 9:12 pm
Forum: General Astronomy
Topic: How do Dobs/Newtonians fare in singapore light polluted skies
Replies: 6
Views: 7522

Re: How do Dobs/Newtonians fare in singapore light polluted skies

I have a C8 and a 10 inch self-built dob, have briefly used an 8 inch dob for a while, also had the chance to compare the 10 inch side by side to a 12.5 inch in SG. I am a firm believer that "aperture is king" and would say the difference in aperture is as expected. Mainly small, noticeabl...
by joachim.ong
Sun Jan 08, 2023 5:35 pm
Forum: Astrophotography
Topic: Planetary Obession
Replies: 24
Views: 40432

Re: Planetary Obession (latest: 2022 update)

Again, time to update this post. Only managed two images in 2022 due to multiple factors including my schedule and clear skies simply not aligning, a shift toward visual, and building of my dob. Venus - my first time imaging in invisible light. The colour palette brings out subtle cloud features. I ...
by joachim.ong
Thu Oct 13, 2022 10:22 pm
Forum: Astrophotography
Topic: Planetary Beginnings
Replies: 7
Views: 7530

Re: Planetary Beginnings

Oh for deep sky astrophotography light pollution is a problem, but not as bad as for visual because it can be mitigated if you have long integration times or large aperture. And then of course there are filters which is a rabbit hole of itself. I think it really depends on your expectations. If you ...
by joachim.ong
Sat Oct 08, 2022 12:47 pm
Forum: Astrophotography
Topic: Planetary Beginnings
Replies: 7
Views: 7530

Re: Planetary Beginnings

I feel it's not much use to find "dark" sites in sg because you can't really escape the light pollution. Anyway for planets, light makes absolutely no difference to the view because they are so bright. A good location for planetary will be somewhere open, away from tall buildings and other...
by joachim.ong
Sun Sep 25, 2022 4:28 pm
Forum: Astrophotography
Topic: Planetary Beginnings
Replies: 7
Views: 7530

Re: Planetary Beginnings

Great job, it's really quite fantastic for a 6 inch scope. I think you've nailed most of the process, so it'll mainly be down to seeing. Observing location has a huge impact on seeing too.
by joachim.ong
Fri Sep 16, 2022 9:04 pm
Forum: Buy and Sell
Topic: WTS: Nikon D5500 Modified
Replies: 0
Views: 4911

WTS: Nikon D5500 Modified

Nikon D5500 Astro Mod Modded DSLR camera - stock IR filter replaced for increased Ha transmittance. $700 (Discount available for students.) NOTE: In-camera sensor cleaning and autofocus do not work due to the modification. Message me: 98-18-four-eight-59 Sample image of milky way and lagoon trifid n...
by joachim.ong
Sat Sep 03, 2022 11:35 am
Forum: DIY Astronomy
Topic: String-strut DOB250
Replies: 4
Views: 9800

Re: Strut-String DOB250

The whole thing weighs about 10kg! My plan is to pack it into a medium size suitcase (~26in) and if flying hand carry the mirror. I'm making a shroud from photo backdrop cloth because it is basically useless for deep sky with the mirrror so exposed, so maybe that might be enough for dew. Things are ...
by joachim.ong
Thu Sep 01, 2022 11:22 pm
Forum: DIY Astronomy
Topic: String-strut DOB250
Replies: 4
Views: 9800

String-strut DOB250

Ultra portable 250mm Dobsonian : Herein lies my journey into ATM - Amateur Telescope Making ~~~ I've been wanting to own a dob for a while and also wanted something airline portable. Well there aren't many options on the market so I went from toying with buying a Sumerian or Hubble Optics to saying...