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Victor Boesen

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Victor Boesen last won the day on December 26 2021

Victor Boesen had the most liked content!

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    https://myastronomyjourney.wordpress.com

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    Astronomy, radio, chemistry, physics and science in general...
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    Frederiksberg, Denmark

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  1. Sorry to hear this.... May I suggest you post about it on the danish Astronet? I would not be surprised if it caught the interest of someone there!! https://www.astronet.dk/forum/ De bedste hilsener - Victor
  2. Don't they have 1.25" treads on the eyepiece side anymore? Mine from 2017 do at least. It's very useful! Victor
  3. That's excellent. Job has done a large variety of interesting things in the amateur radio astronomy community! I did something similar myself a couple years ago, albeit with some more modest equipment due to my current life situation My setup consisted of a simple wifi grid antenna I bought on ebay, together with a dedicated LNA and an RTL-SDR. Here are the observations I used to determine the rotational velocity from, showing the change in dopplershift across the galactic plane. And finally, my achieved results below. The blue dots represent the initial results, whereas the red results were corrected to the barycenter, ie. with the orbital velocity of the Earth taken into account. It's always fascinating to see what Job achieves with his amateur equipment, and it's very fun to push the limits - just like in astrophotography! Victor
  4. Wow Ed! Once again very impressive results Since you've adjusted the LO frequency of the LNB is there any way you could perhaps benefit from an LNA like the Nooelec H1+ SAWbird? I can't remember if you are already using some sort of filtered amplifier. Victor
  5. Beautiful Stu! I just came inside after observing the exact same features myself - good to have some images that represent what I saw Seeing was a little wobbly here, however, the weather was very calm so I spent about an hour outside. Victor
  6. Another important thing to consider is - are you seeing CA or just atmospheric dispersion? The latter isn't determined by the quality of the optics, and is usually characterized by red/blue colors, whereas CA reveals itself in the form of yellow/purple colors. Victor
  7. Excellent Jeremy! Haven't been out solar observing for a long time due to lack of spare time unfortunately. I'm curious how the tak prism handles the heat from the sun with the Quark placed after the diagonal and the diagonal being a prism and not a mirror? Victor
  8. On the lens, manually set the F-number to the highest number available. This should fix the issue you mention. I've owned the Samyang 135mm with a D3300 so I've had the same "issue" Victor
  9. My sincere condolences to relatives and friends!! John was so valuable to this forum - not only through his knowledge and experience but also with his personality!! He will be missed by many... Victor
  10. Excellent work ZiHao!!! Good to see you're still working on H-line stuff I haven't had much time to do the same lately, but hopefully I will in the future. I'm currently working on refurbishing the ground station at my university. If I succeed I should have a 3m dish to do radio astronomy with Victor
  11. You're welcome Feel free to share a link in this thread if you decide to collect your thoughts in a separate thread/post! Victor
  12. I'm getting along very well with my Castor II and 102mm APO! I did consider the Giro ercole mini too while looking for a replacement for my AZT6, however, I ended up with the Castor II as it was slightly cheaper, and I was more drawn to Berlebach's easy way to add another dovetail clamp to the other side for dual-scope use. With that said, it's my impression that both mounts are excellent for "lighter" scopes (eg. not huge fracs, newts and etc). In my opinion, the Castor II is surprisingly stable on a heavy duty tripod, like the Skywatcher stainless steel, and with a counterweight or second scope. Victor
  13. Don't mind at all! Yes, I used a Tak prism back then, but I don't anymore (wish I hadn't sold it). I had no problems reaching focus with my Explorer Scientific 82 degree eyepieces, however, I didn't have my Baader Classic Orthos back then so I don't know if they would also reach focus. Victor
  14. I have actually never used the AZT6 with a counterweight as I originally bought it without a counterweight for my 72ED and figured I didn't need it It should perform better with one though! Depending on the tripod the vibrations at low power (<50X) is roughly 2-4 seconds from what I can recall from memory. So not great, not terrible I shall emphasize that the tripod it's mounted on is just as, if not more, important than the AZT6 itself! Victor
  15. As mentioned by @vlaiv, I own a Tecnosky 102mm F/7 and have used it a lot on my AZ6T both on a manfrotto photo tripod and on a Skywatcher stainless steel tripod. I consider it fine for grab-and-go, but have also purchased a Berlebach Castor II as the AZ6T is, quite frankly, not quite stable enough for high magnification observing. The biggest problem/issue I had with the AZ6T was, that I found it quite bad at vibration dampening, which is also why I think it's not up to the task of high magnification observation. Using the stainless steel Skywatcher tripod of course helps, so I'd recommend you to use the most stable tripod you have. With that said, I actually got along with the AZ6T for quite some time before I finally bought the Castor, so the AZ6T should certainly be usable for the 102mm, as long as you don't load it with a heavy 2" prism, large 2" eyepiece, finderscope (use a red dot or no finder) and etc. With regards to the 102mm scope, it's excellent! I thoroughly enjoy mine and have never regretted purchasing it. I use it for everything really - Deep sky, planetary, lunar, double stars and solar (white light and H-alpha). Feel free to ask me any further questions:) Kind regards, Victor
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