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Everything posted by nytecam

  1. Your top drawing is best - the second is wrong ie rain piddling down across the gap will cause leakage into interior. Natural ventilation works when windy but when calm dew can occur internally and needs forced ventilation via a fan to mitigate. A small thermostatic greenhouse heater under scope a further aid against dew on electronics in winter. BTW using a dehumidifier really needs a sealed obsy [unlikely !]otherwise it will try and dry the whole planet's atmosphere drawn in through air gaps around doors and roof Nytecam - architect
  2. Tried AC in the past. For health issues I've not used or entered my obsy since last Sept but during the recent 'heatwave' did so to find the anti-condensation domestic fan still running and doing its job. Fired-up SCT and all was well Nytecam
  3. Excellent and informative as always -well done Nytecam
  4. Brick and blockwork can act as heatstore but may be need for security or fire protection reasons. Protct sunfacing sides with shade, vegitation, climbers, white paint if practical. I prefer to use timber framing and thin metal sheet for roof/dome which have low mass and cool quickly after dusk. See my dome build link below ;-) Nytecam
  5. No need for such complexity - a simple "octagonal" dome with the minimum panels as Ron Johnson's as below with permission http://home.freeuk.com/m.gavin/rondome.htm Nytecam - 6 domes / zero ROR
  6. the blurred 'comet' head is due to camera shake to double its true width ie high 'plane and contrail. Nytecam
  7. Had a great evening with late Bill Bradfield in Adelaide OZ along time back. He could almost discover a comet to order such were his skills. He made a point of searching the parts of the sky NOT easily visible from Japan with great success :-)) Nytecam
  8. Here in SW London LP is horrendous and still orange mainly from lp sodium on main roads with broadband fluorescent in residential roads to lesser extent but then I gave up eyeballing years ago in favour of brief exposure imaging to laptop in near realtime so I'm happy :-) Nytecam
  9. This seems a copycat of another announced fully automated scope plus small CMOS OSC sensor to appeal to the smart phone generation so no EP neaded or even expected. Probably a five-minute wonder for the rich with no previous interest in astro. An 80mm ED f/5 frac I find is a toy scope - its smaller than the central obstruction in my SCT - sorry :-) Nytecam
  10. The classic hemispherical dome has some issues when of modest amateur size primarily because the covering gores, if from flat sheet material, can only be curved as part of a cylinder. The problem is reduced if the gore are very narrow. An alternative is to have an octagonal dome and base-ring and use cylindrical wall panels throughout with minimal cutting of sheets. When seen in profile the dome still retains the desired hemispherical form - see Ron Johnson's 2.4m ply painted dome below. . Nytecam
  11. Sad news on Tom Bopp-RIP. He gave us a great comet that I saw on a couple of early mornings from the comfort of my pillow! Even got a lo-res spectrum of HB and lucky to serve as BAA pres during the passages of both HB and Hyakutake - a great comet duo :-) Nytecam
  12. It's an all-in-one-package similar to what I've been doing for a decade using regular equipment. It's really quite small in aperture and can't apparently view, for example, the central star in the Ring Nebula M57 - to me a minimum requirement. It has some strange design features, like on open tubes Newt-like scope [instead of a sealed optical window], a three-vane spider giving 6 diffraction spikes and potentally wobbly tripod connection. The latter is quoted as ok as solved by guidance system [!] but not IMO with the eye bumping the electronic EP as it will. Direct wireless to phone screen would be better and social media From long experience I do seriously doubt that non astronomers would know what to look for beyond the obvious moon which anyone could aim for without expensive aids. Even at my astro club most members are 'lost' beyond half a dozen famous deepsky objects sad that it is. Nytecam
  13. Yep - high priority for early obsy so no stuff in the house to cause dissent. If I do leave something out inadvertently I just say I've had it ages and it's never queried Nytecam
  14. Hale-Bopp was amazing - could even see it from the pillow - wife one night awoke me with "its there again !" Hyakutake was pretty good too - had both comets whilst BAA pres Nytecam
  15. Yes that would seem correct - the name has changed over time ! Nytecam
  16. nytecam

    SX M7

    I still have the SX7 but have not used it for a decade or more - it run on the pre-SX Lodestar-C s/w. The downside is the camera is not USB but parallel port so needs a adapter/converter. Check with SX. Nytecam
  17. Thanks Freddie - it's hard work sometimes Nytecam
  18. Bill - your demo of SX v SLL s/w shows the differences ! I've used SX colour s/w for over a decade before Paul's excellent s/w with the Lodestar-C and SX MX7 cams etc and the s/w includes some powerful if clunky options. Under my severe London LP the SX s/w filters are invaluable and remove my hideous sodium yellow skies to neutral grey by pre-checking appropriate boxes in the colour menu ! Colour balance and saturation over a wide range included. The s/w also allows auto dark and flat calibration etc Play and you'll see what's possible - I'm still learning Nytecam
  19. When I saw this link..... I thought it perfect for our video forum but on closer inspection the "30s" refers to subs and as many as you like....so whilst it still works for video your clearly in competition with AP with super long accumulated exposures too. Nevertheless give it a go Nytecam
  20. Joined in BAA 1950 and, but for a break in the early years of bringing up a family, I'm in my 67th [almost continuous] year ! I think it's brilliant and extremely rewarding but like much in life it's about what you want to contribute and what you get back. Dissenters about joining any organisation says a lot about themselves Nytecam
  21. What you need Mr Spock is a yard obsy for your too heavy scope so you're ready to go at a moments notice. Chances are the scope will be more at equalibrian to night temps and less cool down time on Jupiter. But even that wouldn't satisy me - I want and get detailed galaxies views by dumping the EP for a little USB cam to laptop like M51 in just 3s exp and in 30s or more in colour. My YouTube sampler Nytecam
  22. Wot - got no skills? Hemispherical DIY domes every time for wind, LP and dew protection for scopes and user ! And it can be done with cylindrical sheet panels Nytecam
  23. There's a common misconception that a cosmological "redshift" automatically makes the object red - it doesn't! A redshifted object can appear "blue" if there is dominate radiation in far-UV etc shifted into the visible range ! Conversely at extreme range and redshift, where there is no significant radiation in the far UV etc, it can appear "red". Look at some of the remotest "red" galaxies in the Hubble Deep Field. Converting redshift to a visual concept is challenging Nytecam
  24. One of the best S&N I've seen for ages - even spotted the quasar in the NGC 891 fov - inspirational Nytecam
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