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StuartJPP

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StuartJPP last won the day on December 18 2017

StuartJPP had the most liked content!

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About StuartJPP

  • Rank
    Brown Dwarf

Profile Information

  • Gender
    Male
  • Interests
    Birding and now a bit of astrophotography.
  • Location
    Leeds, UK
  1. It definitely does make a difference if there is light hitting the viewfinder, say from a street light as I have experienced it myself. As a consequence I always cover the optical viewfinder to eliminate this.
  2. StuartJPP

    The Beyond Stupid Thread (Flat Earthers Etc.)

    The thing is that we are living in a topsy-turvy world these days. I don't trust institutions like the BBC as they always put some PC slant on everything they spew, to a lesser degree than some of the other rags, but they still wind me up. So if that drivel is to believed why not flat Earth theories? No more ridiculous then some of the current gender theories floating around to someone who believes in science, not feelings.
  3. StuartJPP

    Dew

    Did this I once and heated the front objective of my refractor (lens) a tiny bit too much and dew formed on the inside of the lens.....so be careful It completely dissipated but was quite worrying when I first saw it. These days I just use some low wattage DIY dew heater strips which keeps dew and frost at bay.
  4. StuartJPP

    ASI1600MM Pro through Startech USB hub

    There's definitely benefit to using "decent" cables regardless of their origin. There are a few things that do make a difference, the wire gauge used should be correct (to be able to carry the current), the data lines should be twisted to eliminate cross-talk and shielded and the connectors should be decent quality, preferably gold plated. Anything more is more than likely snake oil. A cable with an integrated ferrite can also help interference issues. I keep all the cables I get from various equipment, in that way I have all manner of USB cables, with different connectors (Micro, Mini, A-B etc and also some right-angled ones) and lengths...comes in handy as they are effectively "free". There's also a difference between setups where the cables are left plugged in indefinitely or plugged in every session...plugged in indefinitely can have issues with dissimilar contact platings causing contact issues over time whereas being plugged in each session can have a self cleaning action. I have thrown rubbish cables away before as they were definitely the cause of my issues but I certainly wouldn't pay crazy money for a USB cable.
  5. It is quite strange that Roger's image looks like no other image of that region of sky, both from OSC or mono cameras. Perhaps everyone else is doing it wrong? I am an advocate of having a DSLR modified if you can so that it's spectral response is similar/closer to that of a dedicated astro OSC camera. It all depends on your own personal preference. Do you have to modify your camera? No, of course not but I will stick with my modified Canon 6D, my Canon 5D Mark III however will remain unmodified...
  6. StuartJPP

    Polar alignment accuracy

    I did a back-to-back test of SharpCap and Polemaster a while ago, both produced very similar results which is not surprising as they use very similar methods. SharpCap's method is based upon PhotoPolarAlign which itself is based upon another that escapes me. SharpCap has the potential of more accuracy since it can use much longer focal lengths than the 25mm of the Polemaster. Here were my findings:
  7. What is the reason for not wanting to continue using the Canon lens? Poor corner stars, coma etc? I have been imaging with a Canon 500mm F/4 L IS lens from day one and will continue to do so until I stop doing astrophotography. The reason being is that it costs nothing as I already own it. The only real benefit of going with a dedicated OTA for me is focus, since on the Canon lenses the travel near infinity focus is very short. Additionally for me, it is next to impossible to get anything close to f/4 at 500mm. However since I intend to stick with my Canon 6D for imaging I also get free remote focus...
  8. StuartJPP

    QHY 8 Pro Strange lines on captures.

    Have you got any USB cables with integrated ferrite beads in them, they can help reduce EMI with tightly bundled cables? Use them on the camera USB cable. Like this: Or ferrite clamshells on existing cables if you have got any:
  9. StuartJPP

    Easy PCBs

    I have used Eagle before and found its user interface extremely infuriating, however for the price of the freeware version you can't complain too much.....
  10. StuartJPP

    First Man

    I am surprised that the title of this movie managed to get approval these days and the lack of the planting of the flag to me was purely politically motivated. Me, I'll give it a skip, perhaps it is just me getting older that makes me detest most Hollywood tripe these days, especially with hidden agendas.
  11. StuartJPP

    Imaging the Pleiades

    I used 3 minute subs on an f/4 scope (lens) using an unmodified canon 5D Mark 3 a while ago and found that was the sweet spot for me. The sweet spot being able to get enough data on each sub, not losing too much time on lost subs and getting enough subs for stacking algorithms to do their job (>25 or so). I was also unguided at the time and felt going longer than 3 minutes would have introduced too much drift. F/7 is nearly 4x as slow as f/4 so personally I would stick with longer subs. Of course it also depends on the ISO you are using...don't want to oversaturate the stars. This was imaged in a fairly dark area in Scotland.
  12. StuartJPP

    Astrophotography in Southern Africa

    You definitely need to book outside of the "rainy" season.......I went to SA in 2015 in March to attend a combined wedding and birthday anniversary and it rained during the night most of the time I was there....last time I go on holiday for an anniversary/birthday etc! At Namibian latitudes astronomical darkness doesn't vary too much between summer and winter so best bet is to find what is best placed in the sky for beginning or the end of the "drier" season. I did see and briefly image the LMC.....very awesome to see visually, like a mini Milky Way, about fist size at arm's length.
  13. StuartJPP

    Oh God is this the Future?

    Much like everything else reported by The Guardian, pure rubbish.
  14. StuartJPP

    My Mars 2018 Collection

    Great example that shows the different disc size using the same kit.
  15. It would be helpful for others in the future having the same issue to know what actually solved your problem....
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