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Marci

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About Marci

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    https://dirtyastro.wordpress.com

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    Male
  • Location
    Newton Bar, Wakefield, West Yorkshire - UK
  1. Marci

    Welcome to all

    Popped up to Towton Moor on Monday eve with the gear... managed to get a shot of the obligatory nebula-du-jour. Nowhere near the clarity, sharpness & composition of Ryan’s previous masterpiece... but good enough for me!
  2. Marci

    DSLR Active cooling MOD process - Part 2

    Sorry - I worded badly... have a look at https://www.overclock.net/forum/62-peltiers-tec/121488-testing-undervolt-tec-air-cooled-3.html#post1319096 The original post they refer to there (which originally contained much more data for a wide range of manufacturers, and the validated test rig etc) over on HardwareAsylum looks to have been lost (altho I’m 90% certain the original thread was actually on procooling.com a few years prior - it _was_ 20yrs ago... my memory gets hazy).
  3. Marci

    DSLR Active cooling MOD process - Part 2

    Insulating all exposed coldplate will also increase efficiency - you'll be losing a good chunk of cooling power to the air. Can improve efficiency further by finding a higher wattage/voltage etc and under powering it - look to PC TEC cooling forum archives for spreadsheets of make/model testing - getting you same wattage but for lower ampage at 12v = same cooling for less power consumption... amp-load saving can be dramatic
  4. *snip* (I'd missed a page of replies)
  5. PSP does NOT support 32bit-depth image formats - only up to 16bit-depth. See http://help.corel.com/paintshop-pro/v20/main/en/documentation/index.html#page/Corel_PaintShop_Pro/Understanding_color_depth.html Colour bit-depth of an image is _completely_ unrelated to memory addressing bitsize of the targeted software architecture (i.e.: 32bit software/OS/hardware v 64bit software/OS/hardware). That said, your camera won't be producing 32bit subs - it'll be producing 8, 12 or 14bit (iirc for most common sensors, 16bit if it's an expensive astro-specific scientific camera), so it's pointless sticking with DSS's default behaviour of saving 32bit TIFs. You can't invent data (the additional 16bits of color depth) that isn't there & recorded by the sensor to begin with. Set DSS to save as 16bit, then use any software supporting 16bit color depth images (PS / PSP / Gimp / Affinity etc, regardless of 32bit / 64bit architecture). pixInsight & Maxim (& probably other scientific image processors, as opposed to photographic visual image editors) will handle 32bit-depth image formats, but bear in mind any data beyond the bit-depth of the camera sensor is invented/backfilled by mathematical algorithm.
  6. Rotunda Shipping Tubes will be closest match - folks stopped manufacturing the traps case style pictured years ago, they're all moulded abs plastic these days as they protect the stands better & hold more weight.
  7. If you intend to use PEC (periodic error correction) via EQMOD you should use ASCOM pulse guiding (otherwise PEC & ST4 fight against each other)... if not using PEC, there's no real discernible performance difference between the two. Most using EQMOD lean towards pulse guiding, whereas most handset pilots I come across tend to be using ST4.
  8. Photo says 48mm, topic says 58mm ... which is it?
  9. Marci

    ascom wont connect to mount

    Is PHD2 connected to the mount successfully, whilst APT cannot... and if so, if you disconnect PHD2, does APT then connect... or does _nothing_ connect successfully?
  10. Full spectrum mod = CLS CCD Regular astro mod = CLS
  11. See http://www.deepskywatch.com/Articles/flocking-newtonian.html - details it nicely.
  12. Just edited post to add link to that youtube video... Tony Hallas: DSLR Astrophotography - Nov 2014. S’a subject-to-opinion piece, but still worth watching. I tend to use the Camera RAW correction tools on the final stacked output rather than doing it on each sub as he suggests.
  13. Most practical mods are whacking a fan on it’s bum to speed up cooling down the primary, flocking the interior if not already done to improve contrast, and grabbing a set of Bob’s Knobs for the secondary to make collimation easier. I then added a mobile phone mount alongside the finder scope and fired up Stellarium to deal with pointing & finding...
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