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fuzion

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Posts posted by fuzion

    Laser pointers for astronomy

    in Space, Science & nature

    Posted

    Don't want to be a killjoy, but Magpies warning should not be taken lightly. Not for no-good reason then that the legal use of lasers for pointing devices in the UK is limited to Class II <1mW power.

    Legally, all lasers must be classified according to the danger presented to vision. Unfortunately, imported lasers very often exceed these safety limits and therefore classification by the manufacturer is no guarantee of safety. Beware imported products.

    The power limit above which visual damage will result is defined by DIN std EN0825-1 at 25W/m2 on the retina.

    Even at <1mW power, depending on the spot size, these lasers can exceed 4000W/m2 at 5 feet on the retina!

    Far worse than staring directly at the sun.

    For many years I worked as a designer in the aerospace industry where lasers were used for target designation, ranging etc. Very strict health and safety legislation meant rigorous training in their safe use and 6 monthly comprehensive eye tests were mandatory.

    Just a polite warning that if you misuse a laser pointer, this is the kind of grief you can find yourself facing. These are UK specific laws:

    By shining a laser at an aircraft, you are committing an offence under the "Safety of air navigation act". If convicted you face up to 6 months imprisonment AND £100,000 fine.

    By using your laser outside i.e. not private property you are violating HS(G)95. The Health & Safety Executive rules on public use of lasers. Basically an un-authorised display. The HSE can implement £UNLIMITED fines.

    If your actions result in property damage you are liable for criminal damage.

    If you injure someone you are looking at GBH. Up yo 5 years prison.

    If you kill someone its Manslaughter. 20 YEARS.

    Have fun but please take care and be responsible.

    Sermon over.

    ffO.

    Yes quite very serious lasers most of mine are class IIIb and i always use laser safety goggles when using them.

    anything 5mw and below is legal like the core series on wickedlasers site is great for starpointing

    however i use my spyder II BX blue laser as i find it is more visable and looks cool !

    Fuzion

    Use link below for 5% discount at wicked lasers if your thinking of buying! :D

    matchbanner.gif

    Laser pointers for astronomy

    in Space, Science & nature

    Posted · Edited by fuzion

    I've had one of the green ones (a Howie Glatter one) for about 4 years now, and there's nothing I like more than pointing it at military aircraft and then running like hell.

    some of the higher powered lasers they sale are capable of burning and are very dangerous to the eye! and they come at a hefty price tag i myself have 6 lasers from 5mw -300mw of red green and blue as well as purple/violet.

    But beware once you buy one it gets adictive and very expensive lol

    quick pic atached to show ya some of mine

    Fuzion

    post-1430-1197541854_thumb.jpg

    Are the Media Correct to use the term Mini Tornado?

    in Hurricanes, Cyclones and Extreme weather worldwide

    Posted · Edited by fuzion

    what it all comes down to is the medias and public's perception that everything is bigger and better and bader in the US thus if when we get a tornado in the uk its mini because its of less power to the F4 & F5s in the US that are mainly reported in the uk media so when we get a T1-T4 which as we have seen causes damage some very bad its still not seen to be total devastation like the F4 & F5s but still makes it in no way shape or form mini after all its still a tornado and we have the T scale for a reason, the US media use there F scale when describing a tornado they dont say a mini tornado rips through wherever when reporting on a F1 do they neither should the uk media they need to be educated and informed of the T scale as with the increase of tornadoes happening etc and being reported etc it needs to be reported correctly to the public so they can be aware of the dangers of even an T1-T2 because your more likely to sit up and listing if its reported as a T2 tornado than if its reported as a mini tornado because most people would just think o mini no damage then nothing to worry about just a lame mini uk tornado when it should by no means be taking so lightly as this i feel could endanger lives it needs to be reported properly and i feel we should all on here and all weather forums send emails explaining this to all the major media outlets could one of the mods possibly get the appropriate email addresses for the media outlets and post on here plz so we can tell them in mass :) il look for the emails too and post in here if i get some :) we will unite and educate the media so they can correctly educate the public :) or that's the the plan anyway lol

    sky news contact emails i found here http://news.sky.com/skynews/article/0,,70131-1237852,00.html

    bbc news 24 contact form http://news.bbc.co.uk/newswatch/ukfs/hi/ne...100/3959111.stm

    or this one http://news.bbc.co.uk/newswatch/ukfs/hi/ne...600/4032695.stm

    fuzion

    November Photo Competition

    in Archived weather photography area

    Posted

    wow cool mate love the second one looks fantastic well worth the singed camera lol

    OK, my three entries - all from November 4. A little experiment with my small Canon G6 set on the ground below the rocket tube with the full moon in the bottom of the frame, then set to self timer while I scarpered! I can report that the camera is recovering well, if a little singed round the gills. :whistling:

    As I mentioned on the Guy Fawkes thread in the photography area, that is my brother in law lighting the fuse. The match acted like a mini-flashgun to freeze him in the frame while the long exposure caught the fuse starting to fizz.

    post-2999-1163327170_thumb.jpgpost-2999-1163327227_thumb.jpgpost-2999-1163327193.jpg

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