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Thread: My ZEQ25GT never fails me.

  1. #131
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    Default Re: My ZEQ25GT never fails me.



    If you think that graph is flat try PHD 2. I bet that used one came from one of you lucky CEM60 owners out there haha. Someday. Enjoy the mount. Mine is still going strong after nearly 2 years now.
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    1984 Meade 2120 10" SCT- 1998 U.S.A. made Celestron C8 SCT -StellarVue SV80ED Doublet- 1960's Homemade 6" F5.6 Newt - Astro Tech AT8IN Imaging Newt- Vintage 1961 H.O.C. made ATCO 80mm/1200mm refractor w/ original vintage eyepieces - 20x70 Orion Little Giant II binoculars w/ original 1997 Virgo SkyMount Parallelogram-Zhumell, Orion, Astro Tech 9x50 finderscopes - Orion Atlas AZ/EQ-G iOptron Skyguider Pro Unmodded Canon 5DMKiii - Modded Canon 700D/ T5i- ZWO ASI178MC CMOS - Meade DSI II Mono CCD APT-DSS-PHD-CDC-PS-LR


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  2. #132
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    Default Re: My ZEQ25GT never fails me.

    Leveye, I've been using just PHD and have been OK with it most of the time. Since I had other matters to attend to, I really didn't pay close attention to the quality of my light image stars until the other day when I magnified a couple of runs. After that I can conclude DSS does a good job mitigating irregular stars in the final image. All I know is the fact I need better performance out of my mount starting with the polar alignment routine. My last imaging session was a few nights ago with 18 subs ranging from 2 to 8 minutes and 18 darks. The good news was the set up completed the run without a hitch, the bad news was the irregular star shapes caused by field rotation. I had the "whirlpool effect", that is most stars in the middle were round, but the stars outside that formed a circular pattern around the middle. Now if someone can interpret this pattern "code" I would appreciate your opinions.

    Since the session was basically an experiment starting with trying to use the hand controller program for polar alignment through long exposures at ISO1600 with bad skyglow conditions. I went ahead with the longer exposures just to see how those subs would turn out so it was no surprise the histogram was pushed far right and the image appeared washed out. Later on after initially stacking the 6-8 minute subs with the other shorter exposures I deleted them from the pile because I couldn't process out the skyglow without diminishing the image details too. I was at a disadvantage because of my skill set is pretty low in post processing, but I have learned there is more to DSS's processing tools than what meets the eye. Its actually quite powerful and making very small but numerous adjustments is advisable. I also learned the longer the exposure doesn't necessarily mean the image degrades based on time, or starts off great and gets worst. The degradation is always there, whether at 2 minutes or 8 minutes, its just dimmer on the shorter subs.

    For a variety of reasons I can't perform the "Bright Star" polar alignment routine so I'm forced to depend on the polar scope to achieve an accurate polar alignment. I know it can be done and I've done so in the past, but my consistency leaves a lot to be desired. At this point I'm not to concerned about longer subs because I'm limited by the sky glow. But, I have two to three dark sky overnight trips planned over the next few months and I'll be in the imaging heaven of black zone skies. I would hope to find a solution to consistent longer exposures by then, but in the meantime my backyard strategy will be taking much more shorter subs.

    So now I'm thinking to try PHD2 thinking the newer version might improve matters, so what are the main advantages of PHD2 over the previous version?
    AstroTech 106 Triplet APO, Celestron 11" EdgeHD, AstroPhysics 900GTO, Canon 60Da and a bunch of other stuff.

  3. #133
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    Default Re: My ZEQ25GT never fails me.

    I've never had a field rotation issue with this mount with any of my scopes focal lengths..460,560,800 or 2030mm. I'd try realigning the mount a bit better myself. PHD2 has so much going for it over 1 that is a lot to go over here.Just try it and you'll see. I most appreciate the re-sizable boxes and how it just starts re guiding without having to do calibration again or if you loose a star and the clouds disperse or want to switch to another brighter one. Calibration is much much faster as well. You'll never look back I tell ya. After using it for nearly a year now I have since removed PHD1 from my computers.
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    1984 Meade 2120 10" SCT- 1998 U.S.A. made Celestron C8 SCT -StellarVue SV80ED Doublet- 1960's Homemade 6" F5.6 Newt - Astro Tech AT8IN Imaging Newt- Vintage 1961 H.O.C. made ATCO 80mm/1200mm refractor w/ original vintage eyepieces - 20x70 Orion Little Giant II binoculars w/ original 1997 Virgo SkyMount Parallelogram-Zhumell, Orion, Astro Tech 9x50 finderscopes - Orion Atlas AZ/EQ-G iOptron Skyguider Pro Unmodded Canon 5DMKiii - Modded Canon 700D/ T5i- ZWO ASI178MC CMOS - Meade DSI II Mono CCD APT-DSS-PHD-CDC-PS-LR


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