Search found 389 matches

by JohnM
Sat Apr 15, 2006 12:19 pm
Forum: Computers and astronomy
Topic: Looking for a website that will tell me the good days...
Replies: 8
Views: 5616

I don't think you are likley to get a 7 day accurate forecast - the weather predictions are just not that good. In general the 7 day forecast will give some indication but the weather often happens upto 3 days early or late. The only option is to move to somewhere with very predictable weather - not...
by JohnM
Sat Apr 15, 2006 7:12 am
Forum: Computers and astronomy
Topic: Looking for a website that will tell me the good days...
Replies: 8
Views: 5616

A ggod site for weather forecasts is NETWEATHER. For a link to this and lots of other UK weather observations have a look on the 'Weather to Observe' page on The Croydon Asronomical Societies web site at http://www.croydonastro.org.uk JohnM Webmaster Croydon Astronomical Society Personal Web Page ht...
by JohnM
Sat Apr 15, 2006 7:07 am
Forum: Computers and astronomy
Topic: Planetarium software
Replies: 5
Views: 4729

After You have installed Cartes du Ceil don't forget to download the sister programme Virtual Moon. If you do this when you click on the Moon in CdC you can open Virtual Moon to give you a very detailed view of the moon. Virtual Moon is itself available in 3 versions. The PRO version if your compute...
by JohnM
Tue Apr 11, 2006 8:52 pm
Forum: Forthcoming meetings and events
Topic: Croydon AS 50th / SAGAS Summer Meeting Sat. 3rd June 2006
Replies: 0
Views: 3284

Croydon AS 50th / SAGAS Summer Meeting Sat. 3rd June 2006

The Croydon Astronomical Society 50th Anniversary & SAGAS Summer meeting will be held on Saturday 3rd June, at the Royal Russell School, Coombe Lane, Croydon, CR9 5BX, just off the A212 to Addington. All welcome - you do not have to be a member of the CAS or SAGAS society This meeting will be in the...
by JohnM
Sun Apr 09, 2006 1:59 pm
Forum: Telescopes and instruments
Topic: Which focal reducer? F3.3 or F6.3
Replies: 8
Views: 2892

Focal Reducers & Toucam

I think I have got you confused. What I am suggesting is a second hand camera lens of 200 - 300 mm f/l with a T-Mount fitting on the back. These should be availble in Second hand shops or on EBAY for bargin prices as they do not support automatic cameras. On the back of that you have a T-Mount to To...
by JohnM
Sun Apr 09, 2006 12:11 pm
Forum: Telescopes and instruments
Topic: Which focal reducer? F3.3 or F6.3
Replies: 8
Views: 2892

Focal Reducer calculations

Most of the focal reducers are designed to work on SCT telescopes. First these have a different thread on the back to other telescopes - It's a bit over 2" diameter. I doubt if you would fit a SCT focal reducer or any other accessory designed to fit the back of an SCT to another focuser easily. In t...
by JohnM
Sun Apr 09, 2006 7:44 am
Forum: Telescopes and instruments
Topic: Which focal reducer? F3.3 or F6.3
Replies: 8
Views: 2892

Full Disc on a Toucam CCD

Another other option is to have a look around for a second hand 300mm camera lens - if this has a T-Mount or 42mm thread at the back it is relatively easy to mount the Toucam camera on the back. All you have to do then is to mount the combination on your mount. If you find a zoom say a 100 to 300 or...
by JohnM
Sun Apr 02, 2006 4:30 pm
Forum: Computers and astronomy
Topic: Help with operating scope over wireless network???
Replies: 11
Views: 8468

USB Leads

I note from the begining of the thread that you connected the telescope through a number of USB leads. You have to be very careful of the number of devices in series with USB. The maximum is 4 I beleive. This includes any active device so the hub counts as one, each 5m active lead also counts as one...
by JohnM
Sun Apr 02, 2006 4:17 pm
Forum: Light pollution
Topic: Time for lights out
Replies: 4
Views: 3853

re: Orange Steet Lights

If you think the Orange ones are a pain wait till your local council starts putting in the 'White' ones. At least you can filter out a lot of the pollution from the orange ones.

John
by JohnM
Sun Apr 02, 2006 1:52 pm
Forum: Gallery
Topic: Moon - Pleiades Conjunction 1st April 2006
Replies: 0
Views: 1065

Moon - Pleiades Conjunction 1st April 2006

I managed to get some imagess of the Lunar - Pleiades Conjunction last night from The Croydon Astronomical Socities Observatory at Kenley Surrey before the clouds rolled in. The images were taken with a Canon 10D using a zoom lens set to 200mm f8 http://i26.photobucket.com/albums/c122/joeparis/Murre...
by JohnM
Sat Feb 04, 2006 2:56 pm
Forum: Telescopes and instruments
Topic: Celestron Skyscout
Replies: 3
Views: 4066

The price is now shown on David Hinds Web Site as £349.00 - available in Summer 2006. Sounds a little expensive for what it is. One interesting use if it can be mounted is to put it on top of a telescope as an 'electronic finder' this would enable one to point a non-go to telescope in the right dir...
by JohnM
Fri Jan 27, 2006 10:20 pm
Forum: Observing
Topic: Mercury and Uranus conjunction on the 14th Feb 2006
Replies: 1
Views: 1368

Mercury and Uranus conjunction on the 14th Feb 2006

Details of the conjunction of Mercury & Uranus during the afternoon of the 14th Feb are in the Sky Diary - Mercury should be fairly easy to spot against the afternoon sky as it is mag -1.1 however Uranus is mag 5.9 - 7 magnitudes fainter. This will be a big challenge visually or imaging against the ...
by JohnM
Tue Dec 06, 2005 8:31 pm
Forum: Gallery
Topic: Venus and Crescent Moon (04/12/2005) - John Murrell
Replies: 7
Views: 2986

Cliff wrote: I am a bit puzzled by your mention of Shutter Speed (TV) 4.8567 though? This is the value the camera gives - 4.8 seconds is plenty accurate enough particually when you are 'hand holding' it. In fact it was wedged against my window frame. There were lots of failures due to camera movemen...
by JohnM
Wed Aug 24, 2005 7:07 pm
Forum: Computers and astronomy
Topic: RAW format image viewer for WIN XP
Replies: 0
Views: 2299

RAW format image viewer for WIN XP

Top end digital cameras can normally store their images in a RAW format. This maintains the full luminance / colour information of the image and also does not lose the detail that occurs when the file is saved as a jpg or any other compressed format. One problem up to now has been that if you save t...
by JohnM
Thu Jul 28, 2005 8:56 pm
Forum: General chat
Topic: Any interest in a New Forum on 'The Virtual Observatory' ?
Replies: 6
Views: 3089

Virtual Observatory & Light Pollution Forums

A couple of comments: While one may think that Light Pollution in the UK does not affect professional Astronomers this is not totally true. A surprising number of UK Universities have teaching Observatories - have a look at the evidence given to The Science & Technology Committees inquiry into Light...