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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. Joker9937

    Star Testing

    Good points, Joachim. I definitely prefer to take photos at a lower magnification. I am sure that it would make a difference. Also, the reality is, I probably should just get a camera if I expect better photos. A phone just doesn't really cut it. Anyway, thank you all. It is much...
  2. Joker9937

    Star Testing

    Thanks, Binastro. Honestly, even if you were, it is deserved. LOL. It really is difficult. And, me, being me, I have limited knowledge. Really, I think I have just enough knowledge to be suspicious of my optics, but not enough to confidently say either way about their "cherry-ness". So...
  3. Joker9937

    Star Testing

    Thank you, Henry. I appreciate your explanation. I see your point about the CA.
  4. Joker9937

    Star Testing

    Thank you, Henry. Probably a dumb question, but if the orientation of the oval shape changes from horizontal to vertical, even with my head in the same position but changing from inward defocus to outside of focus, would that not indicate that it is the scope? Sorry if that is a silly...
  5. Joker9937

    Star Testing

    Thank you. I appreciate it. So, I was able to have a few minutes outside before work this morning. Under a real star, and at full power (120x with the extender) the image was far less astigmatic, but still slightly oblong in each direction. But, other than the difference in the fuzziness and...
  6. Joker9937

    Star Testing

    Thank you. It is possible that there is still a slight bit of astigmatism, but definitely nothing as obvious as the photos. The scope is sitting on the enclosed/unheated porch until morning. I get up early and it is finally supposed to be clear, but frigid. Hopefully I can make sure a true...
  7. Joker9937

    Star Testing

    How bad is this one? I couldn't avoid the thermal issues. Images at the ep are round, but they're swimming. However, the outside image is clearer than the inside, no matter how I cut it. Coma seems slightly evident inside focus. Keep or send back? Also, this was with the doubler attached, at...
  8. Joker9937

    Star Testing

    I agree, regarding the in-field performance being the deciding factor. However, since there is only a small window of time to use it before it is permanently mine, and I have limited opportunity to get use it in real circumstances, the star test is really helpful for me. But, you are right...
  9. Joker9937

    Star Testing

    Thanks, Binastro! I have looked at defocused stars dozens of times, but never quite trust my judgement. I hope my adapter arrives in the next day or two, so I can post a photo. I am trying to use the scope as much as possible to get a feel for it. I hope to compare my astro refractor and...
  10. Joker9937

    Star Testing

    These are good questions, at least to me. So, thanks for posting them. I am currently evaluating a new scope. I purchased one, returned it, and now am trying to make sure I do not jump the gun on THIS one. I MIGHT have jumped it on the first one, but I am pretty sure I didn't. Anyway, my...
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