Contact & Comments

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2 Replies to “Contact & Comments”

  1. Hi there,
    just stumbled upon your blog when searching for Sony a6000 full spectrum related topics. I also own a a6000 full spectrum and recently bought a 80mm Triplet APO refractor which I will now use for some astrophotography. Just wondering if you would have some tips related to a6000 settings, filters etc. when using it for astrophotography?
    Regards,
    Gerrit

    1. Hello Gerrit,

      I would be happy to help with some of my knowledge! Here are some ideas to start with:

      1) if the camera was full-spectrum modified, you should definitely have an UV/IR block filter to have the camera perform as if it was not modified. The same would apply to the IR enhanced modification, where a IR-Cut filter would suffice
      2) Depending on your typical imaging location, you would wand to have a LPS / IDAS / … filter, to cut a fair bit of the light pollution. You will be able to expose significantly longer in urban areas before you saturate images! Never mind the colors getting off. They will be fixed in post-processing 🙂
      3) If you really want to get serious about astro-photography for nebulae or super-novae (what I assume by the full spectrum modification), you will need narrow band filters. No matter which camera you use, the hydrogen-alpha (Ha) and sulfur (S-II) lines are really dim compared to stars, background light and the like. O-III is in the highest sensitivity range of the CMOS sensors. So you probably won’t have that much of a challenge compared to the other two.
      4) all your filters have to be 2 inch size due to the APS-C sensor! I know they are not cheap. But you will waste a lot of data if you install 1.25 inch filters
      5) using different filters calls for a filter slider or filter wheel. Otherwise you will get disappointed by the amount of time spent on focusing after each filter change.
      6) same applies if you use filters of different manufacturer / brand during one session. You would want to look for homo-focal filter sets, where all filters are of same glass thickness.
      7) I hope, you got a flattener with your triplet APO? If not, be sure to add one in first place!
      8) Tracking mount and Auto-Guiding:
      Narrow-band imaging requires long exposures! The A6000 has a rather bad noise performance (compared to up-to-date models like A6400). You will not want to exceed ISO800. With an f/6 APO, I had to go for 600s exposures to get at least some usable data – especially with Ha or S-II. Imaging with longer focal length optics and exposure times above 30s is really difficult – or even close to impossible – with simple sky-trackers. So if you don’t own a high-end and sturdy German equatorial mount, you cannot avoid auto-guiding. I will not go into more details here – ask, if you need further assistance with this topic!

      Now in January is a perfect time to start experimenting with astro-photography! Orion is very well placed. Start off with the bright and easy objects like M42 or the Rosette nebula.

      I hope, I could shed some light on using the modified Sony A6000 camera in astro-photography. If you want to dig deeper into further details, or if you have further questions, drop another line or two 😉

      Cheers, MatP

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