Search found 1305 matches

by rwilkinson
Mon Oct 26, 2009 8:03 am
Forum: Welcome
Topic: Hello from Ross
Replies: 0
Views: 4518

Hello from Ross

I thought I'd start the ball rolling in this new Forum... I've had an interest in astronomy from a very young age, and joined the BAS back in 1980, when I was still at school. My interest was revived around 2001, and so I re-joined the Society in 2005 when I returned to Bolton. I was delighted to fi...
by rwilkinson
Mon Oct 26, 2009 7:46 am
Forum: Astrophotography
Topic: Not seeing red?
Replies: 0
Views: 4116

Not seeing red?

Most Digital SLRs use the same CCD chips as the much more expensive astro-imaging cameras, but don't achieve the same response to hydrogen-alpha light. This is because the DSLR manufacturers fit an Infra-Red blocking filter across the front of the CCD: this improves the performance in for "normal" (...
by rwilkinson
Sun Oct 25, 2009 8:29 pm
Forum: Astrophotography
Topic: No telescope needed!
Replies: 0
Views: 3875

No telescope needed!

Yes, you can get fine astro-pics using just a camera and lens! But it should be a camera with a decent lens, which can take long exposures (30 sec or more), on a steady tripod (or even better, a rotating equatorial mount). These days, digital cameras (particularly DSLRs) are preferred to 35mm (film)...
by rwilkinson
Sun Oct 25, 2009 7:25 pm
Forum: Club events
Topic: Society meetings
Replies: 0
Views: 6987

Society meetings

The Society meets on the first and third Tuesdays of each month from September through to May.
A full list of our programme is here http://www.boltonastro.org.uk/calendar/
And directions to the venue are here http://www.boltonastro.org.uk/Venue
by rwilkinson
Sun Oct 25, 2009 7:17 pm
Forum: Astronomical events
Topic: Meteor showers in 2009
Replies: 3
Views: 5886

Meteor showers in 2009

News of a couple of regular winter showers from the International Meteor Organization http://www.imo.net/calendar/2009 Leonids: max on 17-Nov The evening to early morning UT hours of November 17/18 are likely to be of greatest observer interest. Luckily, new Moon on November 16 ensures perfectly dar...