Search found 1416 matches

by rwilkinson
Sat Mar 05, 2011 1:32 pm
Forum: Feedback
Topic: Thanks
Replies: 2
Views: 8735

Re: Thanks

Many thanks for those kind words. I'm proud to be part of a successful team, and I'd like to pay tribute to the long-standing Committee Members who have helped to build up the Society over the last 30 years, and have given newcomers like Carl and myself their encouragement and support. Aspects of th...
by rwilkinson
Fri Mar 04, 2011 8:25 am
Forum: Astrophotography
Topic: Cheap Webcams
Replies: 23
Views: 39899

Re: Cheap Webcams

I've just been helping Dean to convert his SPC880 for LX-mode. We used a hybrid of the techniques from my document (in the Projects section of our Members' Area ) - serial (COM-port) control was used, but the camera was transplanted into an ABS box: deanscamera1.jpg This does require a little "plast...
by rwilkinson
Mon Feb 28, 2011 8:06 am
Forum: Astronomical events
Topic: iss and satellite spotting data.
Replies: 25
Views: 31763

ISS on Sat 26-Feb

I saw an ISS pass around 18:40 on Saturday evening entirely by chance - I only went out to see if the clouds were clearing, and there it was passing through Orion! But my neighbour Colin was better-prepared, and took this picture of it just using a DSLR with its own lens, fixed on a static tripod: i...
by rwilkinson
Mon Feb 28, 2011 7:55 am
Forum: Astronomical events
Topic: iss and satellite spotting data.
Replies: 25
Views: 31763

Re: iss and satellite spotting data.

Thanks Dean :-) Other sources for local satellite predictions are the Heavens Above website: http://www.heavens-above.com/allsats.asp?Mag=3.5&lat=53.572&lng=-2.430&loc=Bolton&alt=76&tz=GMT That runs in a web-browser (and so needs a live interntet link) - alternatively you can install an application ...
by rwilkinson
Sun Feb 27, 2011 10:09 am
Forum: Astrophotography
Topic: Stellar imaging with an unmodified webcam
Replies: 1
Views: 5241

Re: Stellar imaging with an unmodified webcam

We did initially have problems trying to stack his raw images in IRIS - with the gain wound up full on his camera, the background noise was so high that the automatic Stellar registration couldn't pick out the stars for alignment. :-( But the Setfindstar command can be used to change the threshold f...
by rwilkinson
Sun Feb 27, 2011 10:04 am
Forum: Astrophotography
Topic: Stellar imaging with an unmodified webcam
Replies: 1
Views: 5241

Stellar imaging with an unmodified webcam

I've been following Dean's recent experiments with his umodified SPC880: http://www.boltonastro.org.uk/Gallery/thumbnails.php?album=53 He's made a little bracket to mount the lenses from his Olympus (film) SLR onto his webcam, similar to this one I made for my TouCam : teletoucam.jpg which gives a f...
by rwilkinson
Sat Feb 26, 2011 8:08 am
Forum: Observing - Discussion
Topic: "A moment of lunacy"?
Replies: 5
Views: 10360

Possible ISS transit on 7-Mar

The latest simulation runs predict an ISS transit of the Moon around 5:45pm on Mon 7-Mar, which could be visible from the South side of Bolton. At this time the Sun will be just setting so the ISS will be sunlit, and the Moon is a thin crescent, so it may be a tricky observation. But even if you're ...
by rwilkinson
Thu Feb 24, 2011 7:46 am
Forum: Astrophotography
Topic: An introduction to digital imaging
Replies: 0
Views: 4494

An introduction to digital imaging

David Ratledge has converted his presentation from our 15-Feb meeting into a pdf file which you can download from the Member Presentations section of our Members' Area: http://www.boltonastro.org.uk/Members_Area/ This is a 9MB file, so you'll need to be patient - but it does contain lots of beautifu...
by rwilkinson
Tue Feb 22, 2011 8:16 am
Forum: Astrophotography
Topic: Digital timers for DSLR astro-photography
Replies: 0
Views: 4682

Digital timers for DSLR astro-photography

As David mentioned in a recent meeting, it's now possible to buy "Chinese copies" of the digital electronic timers for Canon (and other) DSLRs for under £20. canon.jpg Just go to eBay and put "canon timer" in the search box. Then you can set a programmed number of exposures of the required duration,...
by rwilkinson
Fri Feb 18, 2011 12:12 pm
Forum: Astrophotography
Topic: philips spc880 webcam
Replies: 11
Views: 16304

Re: philips spc880 webcam

I've just noticed that Telescope House is selling these webcams already upgraded to the SPC900 firmware and complete with telescope eyepiece adaptor and IR-blocking filter for under £39: http://www.telescopehouse.com/ This seems to be good value if you don't want the hassle of doing the firmware upg...