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    SGL 2017 SP


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About Gina

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  • Birthday 21/07/42

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  • Gender
  • Interests
    Astrophotography, Photography, Electronics, Computer Hardware and Software (Programming)
  • Location
    East Devon, UK
  1. Very glad you can make use of it - that's good to know - thank you
  2. Me too I have built an all sky camera and have a weather station project half built but shelved ATM. Whether it gets finished depends on how I feel, what other projects take priority and how long I live
  3. Lovely images Time to get my widefield rig set up again
  4. Welcome back from me too
  5. Thanks for the offer Dave but I think the rod I have will be fine
  6. I think that's almost small enough to fit inside my 3D printed micro dome
  7. I've found an M6 250mm long threaded rod which is long enough (needs about 230mm), Not stainless steel but zinc plated (galvanised) which is probably adequate - I can coat it with grease and I think M6 should be strong enough.
  8. 130 is the aperture in mm (size of the mirror in a reflector telescope or the front lens of a refractor) and the 900 is the focal length also in mm. Focal ratio, f, is the focal length divided by the aperture. If you don't know what these mean I suggest using Google or other search engine as this will give you a lot of the basic information. If you think you might be interested in astro-photograohy I thoroughly recommend the book "Making Every Photon Count" by Steve Richards (steppenwolf on here). This is "The Bible" of astro-photography. Best £20 I ever spent Available direct from Steve or from Amazon.
  9. Looked on ebay and Amazon for M8 studding and no joy. Anything between 200mm (too short) and 500mm (same length as I already have) seem unavailable. Guess I'll just use what I've got and let the excess hang down below the base part, beside the pillar mount. May do more to this tomorrow (I have too many projects on the books I just multitask between several at the same time!)
  10. I guess it depends on how much you rely on dark frame subtraction in your processing.
  11. EXIF data is indeed measured by the digital processing chip and is different from the sensor temperature with a cold finger. I suggest a digital thermometer chip placed on the cold finger to read the temperature. Can't remember the type number mow but it's a DS something and looks like a plastic cased transistor. It's a 1-wire device and can be connected to an Arduino to read the temperature. I posted a thread or two about cold finger cooling and control with a DSLR.
  12. Here are a couple of photos of the mount sitting on the pillar. I'm using a scrap part as spacer to raise the bearing plate to about the right angle.
  13. Found the M8 threaded rod and it's more than twice as long as I would need so I consider it unsuitable. I know I could cut it shorter but I think I would rather not cut it up as it could be more useful for something else. Probably better to buy a shorter length.
  14. I have an M8 threaded rod left over from my cannibalisation of the old Velleman kit 3D printer which I think may be suitable. It is stainless steel and I plan to use a SS nut in a 3D printed spur gear driven by a pinion on a little 28BYJ-48 geared stepper motor.
  15. Here's a photo of the dome support with short section of mount cover glued on and smoothed. This short section will go onto the main mount cover and allow me to adjust the two parts to suit the mount and imaging rig within the mount cover and dome.