Search found 253 matches

by ivan
Wed Feb 13, 2019 8:56 am
Forum: Astrophotography
Topic: Window Astrophotography 2019
Replies: 4
Views: 126

Re: Window Astrophotography 2019

Thanks Peter! :D
by ivan
Mon Feb 11, 2019 10:42 pm
Forum: Astrophotography
Topic: Window Astrophotography 2019
Replies: 4
Views: 126

Re: Window Astrophotography 2019

Thanks Chee Yiun! I don't have any plans to work on M42 as yet, but we'll see!
by ivan
Mon Feb 11, 2019 5:20 pm
Forum: Astrophotography
Topic: Window Astrophotography 2019
Replies: 4
Views: 126

Window Astrophotography 2019

2019 has been a rather productive year for imaging, with several streaks of clear nights. I received my 3nm narrowband filters about 2 weeks ago, which I had to wait about 3 months as I wanted it fabricated to work at fast focal ratios down to f/3 (due to the bandpass shift at highly oblique inciden...
by ivan
Mon Feb 11, 2019 4:27 pm
Forum: Astrophotography
Topic: Sagittarius Triplet from Singapore
Replies: 9
Views: 1187

Re: Sagittarius Triplet from Singapore

Thanks GaryK and Peter!
by ivan
Sun Feb 10, 2019 3:22 pm
Forum: Buy and Sell
Topic: WTS: BNIB Baader 3.5nm HA filter (50.8mm round unmounted)
Replies: 0
Views: 61

WTS: BNIB Baader 3.5nm HA filter (50.8mm round unmounted)

Hi all, I'm looking to sell my Baader 3.5nm enforced HA filter. It is new in box, unopened with its seal still intact. Size is 50.8mm round unmounted. I'm selling it as it was a replacement by the dealer for a faulty unit that I purchased earlier, but I had already bought another HA filter in the in...
by ivan
Mon Dec 10, 2018 3:54 pm
Forum: DIY Astronomy
Topic: Building a DIY F/15 Refractor
Replies: 6
Views: 1082

Re: Building a DIY F/15 Refractor

I was about to post something similar and I saw this thread. Chanced upon this 60ED doublet on aliexpress: https://www.aliexpress.com/item/CSO-Complex-achromatic-telescope-objective-lens-60ED/32862484791.html?spm=a2g0s.13010208.99999999.268.64b63c00jYa7OD They also sell it with the lens cell for 140...
by ivan
Sat Dec 08, 2018 12:13 am
Forum: Buy and Sell
Topic: WTS: Baader Stronghold Tangent Assembly [sold]
Replies: 0
Views: 141

WTS: Baader Stronghold Tangent Assembly [sold]

Good day to all, I'm looking to sell my baader stronghold tangent assembly, which allows micro adjustments to be made for loads up to 7kg in piggyback mounting. It is very solidly built and should provide a flexture-free solution which will probably be quite useful for imaging. I've never used it an...
by ivan
Tue Sep 18, 2018 8:27 am
Forum: Astrophotography
Topic: Sagittarius Triplet from Singapore
Replies: 9
Views: 1187

Re: Sagittarius Triplet from Singapore

Thanks Remus. Been awhile indeed, hope to join you for stargazing sessions next time.

Thanks KK. Time for a switch myself after shooting in red haha
by ivan
Wed Sep 12, 2018 12:30 am
Forum: Astrophotography
Topic: Sagittarius Triplet from Singapore
Replies: 9
Views: 1187

Re: Sagittarius Triplet from Singapore

Thanks Richard and Kochu!