Search found 316 matches

by PETER LOO
Sat Nov 04, 2023 11:26 am
Forum: Astrophotography
Topic: Polar aligning an ioptron SkyGuider pro
Replies: 8
Views: 12011

Re: Polar aligning an ioptron SkyGuider pro

Updated polar alignment using Earth rotation axis.
by PETER LOO
Tue Sep 12, 2023 1:42 pm
Forum: Astrophotography
Topic: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)
Replies: 6
Views: 6565

Re: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)

Thanks Richard, noted. Ya, dust does get in easily while take in take out of the camera. Meanwhile, i am considering to capture the M81 + M82 galaxies with 200mm f2.8 lens on Canon DSLR working with the Skyguider-pro mount. Planned next year Mar to May period. As these object can only climb up to ar...
by PETER LOO
Mon Sep 11, 2023 4:35 pm
Forum: Astrophotography
Topic: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)
Replies: 6
Views: 6565

Re: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)

M83 - Southern Pinwheel galaxy, which is relatively brighter, taken at then Bedok South field on 03 May 2014 (now no more) Mount: GPD2 guided. Scope: TS 90/600 mm cam: Canon 500D mod. ISO 16000, 120s X 21 Top image is stacked Bottom image shows single frame (CR2) of 120s stretched https://live.stati...
by PETER LOO
Sun Sep 10, 2023 10:35 pm
Forum: Astrophotography
Topic: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)
Replies: 6
Views: 6565

Re: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)

Thanks Airconvent, is sensor dust, after stacking looks elongated. As for the vertical lines, they are read out noise, used 2 different cam at D'Kranji site and Changi Beach site made the difference. The Canon 550D (M101) has less read noise, that may also be partly due to 'natural dithering' of mou...
by PETER LOO
Sun Sep 10, 2023 4:44 pm
Forum: Astrophotography
Topic: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)
Replies: 6
Views: 6565

Re: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)

M101 Pinwheel Galaxy: low surface brightness of 14.86 mag/arc-min(SQ), low contrast index of -0.62, hence a fairly difficult object for SG sky Changi Beach 19 May 2013 Mount used: Vixen GPD2 with Star Book-S GOTO system Scope: Meade ED80APO, 80/480 mm, No flattener ! (and no flat field being done) C...
by PETER LOO
Sat Sep 09, 2023 5:39 pm
Forum: Astrophotography
Topic: Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)
Replies: 6
Views: 6565

Faint Galaxies (M99 etc) taken at D'Kranji farm resort (07 Jun 2015)

Hi all, apologies for the inconvenience caused by my FB being down since last year Dec. Here are 3 galaxies (all in 1) taken some 8 years ago with the company of Gary Koh, Carol and Alex Lee over beers at then D'Kranji farm resort. Gary would set up his then brand new ZEQ-25 mount and myself GPD2 Mo...
by PETER LOO
Tue Aug 23, 2022 7:59 pm
Forum: Equipment Discussions
Topic: Astroberry on Raspberry Pi 3B
Replies: 4
Views: 9352

Re: Astroberry on Raspberry Pi 3B

Quite true, waiting for clear sky la 😁
by PETER LOO
Wed Aug 17, 2022 1:06 pm
Forum: Equipment Discussions
Topic: Astroberry on Raspberry Pi 3B
Replies: 4
Views: 9352

Re: Astroberry on Raspberry Pi 3B

Using Stellarmate on Raspberry Pi4, that's nice. My issue was actually caused by the mount itself, Skyguider pro is non-goto actually, otherwise Ekox/ Indi support should be good as well ...
by PETER LOO
Mon Aug 01, 2022 10:13 pm
Forum: Equipment Discussions
Topic: Astroberry on Raspberry Pi 3B
Replies: 4
Views: 9352

Astroberry on Raspberry Pi 3B

Previously in amateur astronomy we used to talk about "Takahashi", nowadays mostly on "connectivity", so trying out Raspberry. [url=https://flic.kr/p/2nBG2oj] https://live.staticflickr.com/65535/52256071170_2ef11e351b_h.jpg Raspberry Pi 3B is the minimum requirement to run Astrob...
by PETER LOO
Sun Jul 24, 2022 3:35 pm
Forum: Astrophotography
Topic: My first attempt
Replies: 6
Views: 10106

Re: My first attempt

M8 Lagoon nebula