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astrosathya

Advanced Members
  • Content Count

    301
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About astrosathya

  • Rank
    Star Forming

Contact Methods

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    astrosathya

Profile Information

  • Gender
    Male
  • Interests
    Telescopes, Mounts, Astrophotography, General photography, CCD cameras, Cooking Indian Vegetarian Food :P
  • Location
    Bangalore, India
  1. astrosathya

    Offset distance for Baader filters

    Precisely. I think all of us who reside in big Cities, be they London, NY, Tokyo, Bangalore etc., are best off with NB filters.
  2. astrosathya

    Offset distance for Baader filters

    I've not had favourable weather to test all of them. I've used only the 7nm Ha filter and its brilliant. Light Pollution is a thing of the past when I use this filter. I hope to use all 7 this season.
  3. Hello Everyone, I have 7x 36mm Baader filters in my QHY Filter wheel. I use a simple Orion 80ED with a manual focuser. I have two questions basically. a) How important is refocusing between the LRGB Ha OIII and SII filters? b) If important, then how do I manually calculate the offset distance between them assuming the filters aren't parfocal?
  4. astrosathya

    Absolute newbie

    Hi Ian, Welcome back to the hobby. The C80 is a refractor of 80mm aperture. Infact its sisters are the Orion 80ED and Sky-Watcher ED80. These are good for deep sky imaging, when coupled with an 0.8x reducer/flattener, but when it comes to imaging planets like Jupiter and Saturn you need resolution, like that of a Celestron 8" SCT. If planetary imaging is your cup of tea, then go for an SCT. This C80 wont be much use, even with a Barlow because resolution is directly proportional to aperture.
  5. astrosathya

    APT connection to QHY FW2

    Thanks for reminding me Dr Ju, I just contacted him. I noticed that I am able to use 5 filters, but not 7, even though I've changed settings in APT to define the 7 filters.
  6. astrosathya

    APT connection to QHY FW2

    Hi Everyone, I have been trying to connect my QHY FW2 to APT and even though it establishes connection, I am unable to rotate the wheel with the software. No clue whats happening. The wheel is powered, connected to CCD and APT. But nothing after that. Someone please help
  7. astrosathya

    reducer for ed80 apart from 0.85?

    On the website of Teleskope Service Germany, they have a Long Perng 0.6x reducer flattener that suits the ED80. A friend of mine owns one of them and says that it works.
  8. astrosathya

    Off Centered Coma

    not yet, skies are very cloudy
  9. astrosathya

    Polar scope for HEQ5

    Thanks for the reply Anthony. Unfortunately, I live at 13deg latitude Bortle 7-8 sky (Bangalore City), which means that most of the dimmer stars around Polaris are all but invisible to Sharpcap as I tested it once when the feature was newly revealed. I therefore rely on my Polar Scope as well as DARV to get PA accurate.
  10. astrosathya

    Polar scope for HEQ5

    I have a 2012 model HEQ5-PRO and it has the older reticule in the polar scope. Could anyone direct me if I can urchase a new polar scope reticule or a new polar scope with the latest reticule?
  11. astrosathya

    PHD2 Sanity Check

    Ah, no, I haven't I'll do that tonight and check
  12. astrosathya

    Off Centered Coma

    Yes, to achieve the 75mm spacing, I have done the following. 1) 44mm from Canon DSLR flange to sensor 2) 11mm T-Ring 3) 20mm T-Thread extension rings. I am assuming the coma corrector is slightly tilted. I have to verify it through tests.
  13. astrosathya

    PHD2 Sanity Check

    I connect my mount to PHD2 using ASCOM and most nights I have the error "Star did not move enough" as well as "Suspicious blah blah, axis may not be perpendicular". This does not happen when I connect the mount via ST4 cable. I read somewhere that I can do a Calibration Sanity Check in PHD2. I am however unable to find that function in the software. Is it some pop up feature or does it have a location in the settings/brain icon? Any help will be highly appreciated.
  14. astrosathya

    Off Centered Coma

    I recently tried imaging M7 with my 6" f/4 Newtonian. I had earlier commimated it with a Cheshire and Howie Glatter and was sure of the collimation. However, when I imaged using my DSLR with the coma corrector installed, I get focused stars off centre and not on the optical axis. Anyone experience anything similar before? What could this be? Tilt in the optical train? The focuser was drawn out only about 5mm to reach focus along with a 50mm extension tube. Any suggestion is welcome.
  15. astrosathya

    How long?

    Recently someone got 10min tracking with EQ3-PRO with guiding. 20s is very less especially you've mentioned drift aligning it. Its quite obvious something is wrong somewhere. Try to do drift alignment by software assistance like using PHD2 or Astrophotography Tool DARV method. EQ3 mount is not really as bad as it seems. Can you see the pole star correctly from where you are? Sometimes from a dark location its also quite easy to "polar align" on another star close by. I'd highly recommend you use APT for drift align. It doesn't get easier than that. But you need to have EQMOD connection for this. You could also do a manual DARV method.
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