Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_2019_sp_banner.thumb.jpg.a0ff260c05b90dead5c594e9b4ee9fd0.jpg

Macavity

Members
  • Content Count

    5,836
  • Joined

  • Last visited

Community Reputation

4,835 Excellent

About Macavity

  • Rank
    Main Sequence
  1. Thanks for answering a "specialist" question! No more expensive than some of the "fancy" GRAYHILL (BCD output etc.) offerings. The demise of "good old" manual technology? Sometime you might not want to introduce "microprocessors" (noise / complexity) into Audio / RF equipment though... Someone remarked on future "shortage of electronic components". Start collecting VINTAGE stuff?
  2. No fear of the dark... A lot of my country rambles used to end in darkness? Good to have a torch hand in such cases? Often I didn't! I am wary of URBAN environments these days? As a 70's Uni Student, I "knew no fear" -- Even on the wee-small-hours stagger home! I find standing around with "precious stuff" in a publicly accessible place doesn't work for me? Recently I was taking some "panoramic" shots with my standard Camera/Lens on local heath-land and "some weird bloke" started to follow me me around?!?!? But I sense that SOME people may not have seen an old-fashioned camera... or telescope? I admit being glad we are not comparing "man stopping power" of weapons on SGL!
  3. The thread continues. And very interesting it is too! My <appreciation> Still a way to go before making a final decision? For Electronics Nerds: Now have to find the BEST way to read out multiple(!) rotary encoders via Arduino etc. Something of a regular discussion on internet forums?! Aside: 12-way etc. (Budget) Rotary switches seem to have gone out of fashion these days? Always good to know "chassis bashing" still exists!
  4. Yes, pleased to see the ubiquitous "Eddystone Box" (for smaller projects) had not vanished... along with (the original) Maplin.
  5. Very elegant there, Steve! Thanks ALL for your various ideas. I detect something of a theme re. transparency? GMTA etc. NOT doing much today... All the hole drilling has "done my back" at bit. lol. At least this time I managed to drill ALL the various holes the correct size(s)! All praise to a nice NEW set of (sharp for a change!) drill bits... All hail the STEP drill notably.
  6. A lot of you are quite into Electronics | (Observatory) "Electrics", so I wondered: DO you have any favoured methods for *finish* stuff with a NICE Front Panel? Recently embarked on a (another hobby!) "Synth in a Suitcase" MIDI interface: There is very little *active* electronics for this one. Just a lot(!) of WIRES. A couple of Arduino Megas and 48 channel ADC shields. It works on a prototype scale, so I can complete this one "at my leisure"? The keen eyed may recognise the (typical) redundant "Maplin" Eyepiece Case. One of the benefits of Video Astro/Imaging? AT THE moment, I make a mock up of *front panels* using random hardboard. Veroboard functions as a very useful "drilling guide" for pilot holes! Even *I* can get my holes in a line using this method? I buy (find) laser-cut Acrylic as an easy to drill material for panels, but I don't think I can cut out NEAT Fader "Slots"?!?!? I CAN (inkjet) print Panel Designs on thin card. I then use transparent sticky back plastic to "protect" the result. I found an 8mm circular hole punch for controls etc. https://www.amazon.co.uk/LoongGate-Heavy-Puncher-Single-Photos/dp/B07NQFWYRJ/ I PONDER using a professional firm to *Laser Cut* my Panel design in Acrylic? There is a standard .dxm (CAD) file for laser cutters? Has anyone tried? Costs? Laser cutters seem to be limited to A3 size. Maybe I could order transparent (smaller) covers to "sandwich" smaller(!) sections of my (cardboard) printings? I saw a nifty idea recently. The guy used a professional Printed Circuit Board manufacturer to "etch" (and print) his front panels too. As ever, such services seem to be far more available in the USA than the UK. Just wondering! "Brainstorming"random ideas etc. etc.
  7. An interesting thread! I did once tease an art-loving GF with notions that e.g. photography "had rendered the whole of fine art" redundant? lol. Living dangerously? If needed, I have learned the "error of my ways"... In my favour, I had bought books on "how to draw/paint"... I Did *try*! I have rarely found MANY people showing an interest in "my" science... To me, the thing is experience... To discover and learn NEW stuff etc. To some extent, I sense, like "Athletics" some folks are better equipped physically... More sensitive eyes? Greater visual acuity? I once showed a total novice the Sun via PST. He could see (describe) stuff I couldn't! Above all I feel I am (despite my critics) an "Egalitarian"! I want to find out WHY people are attracted to different stuff... different techniques? I suppose the danger is I become a "Jack of all Trades etc." But Hey! There is a (life) time / funding thing: Staff? "Go fund me" maybe? lol (Trying to live to the next "Solar Max"... Favoured Planet positions etc.)
  8. Maybe we should have done "Arts" subjects (I often wish!) Seriously how could one engage the public re. your subject? Dour twitterings re. religion & politics + br****? Or maybe: P.S. I suspect the *video* won't work on SGL, but many of you will probably be able to access Twitter... as a *reader*?
  9. I had one... Came with good old "Vixen" 8-24mm Zoom... But perhaps that means it (or I) didn't *really* qualify? I used it to conceal a drip of superglue on a 90mm MAK! Guess I should finally come clean with the purchaser...
  10. Finished! No "rocket science", but does the (one/two) job(s) needed. I used a 2mm thick "hook & loop"(!) disk to allow a BIT of "flexure"... Marked rotation direction to avoid disk cartwheeling across room?
  11. Like it! Recently thinking about the landing site and the ABC craters... Of course the "scale" of the *actual* landing site is a different order again? I saw someone selling 3D printer files of the latter, somewhere on Twitter...
  12. Still have a couple of "standard" books I bought for myself at the time. Both good in their own way... The US perspective and UK perspective? Former more detailed... the latter has a "complete" mission transcript. Hey, I can still do an fair *impression* of Neil A's "One Small step..." etc. Complete vocal impression with "static"! lol. I doubt I'm unique in that?
  13. I did TRY to TEST a Pancake 24mm f/2.8 versus an EF 50mm STM f/1.8 https://www.amazon.co.uk/Canon-EF-1-8-STM-Lens/dp/B00XKSBMQA I used a Test Card on screen (not at infinity!) and scaled images to match... The left hand image shows Centre performance of the lens.... the right hand image shows Edge performance! Pancake 24 at f/2.8 The following suggests quantitatively the EF 50 STM has to be stopped down to f/4.0 (or more) to match the Pancake f/2.8 ???? EF 50 STM at f/1.8 EF 50 STM at f/2.8 EF 50 STM at f/4 ASIDE: The last image had some *camera shake* rather than astigmatism or whatever! lol Does the above really MEAN anything? Who knows?!? lol! I TAKE it to mean that Canon lens performance scales with price?!?!? The 40mm Pancake is said to be better than a 24mm too? BUT throwing caution to the wind, I tried a 10x stack of 2min images at f/2.8 with EF STM 50! I used dark subtraction, IRIS Gradient removal and image enhancement with GIMP levels... My conclusion is the EF50 STM was "Good enough" for me! The (more expensive) Pancake 40mm may have be better? But I decided to stick with the Pancake 24 & EF50 STM f/1.8. Canon 100D + EF50 STM f/2.8 ISO1600 + Baader UHC 10x2min (Darks, IRIS Flattened. GIMP Levels etc.): [removed word] Grana Salis as they say!
  14. Great Stuff... This is something [another thing] one can do really well with EEVA.
  15. Geoff (or anyone!) there is absolutely no need to apologise. Perhaps I should have mentioned it? It's just sometimes I'd would just love to FORGET my limitations... Oh WAIT... Maybe I am maligning myself: I did actually say: Although ostensibly OK, my dicky ticker "lets me know" afterwards... But then my use of words doesn't always "resonate" with SGL's membership? lol
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.