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MHaneferd

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  • Gender
    Male
  • Interests
    Photographing, Astro, biking, skiing, outdoors activity. My little dachs hound, computer, science, gadgets, droneflying
  • Location
    Oslo

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  1. Looks impressive!! I am pretty new to this, but I am curious of why did you do so many Bias frames?
  2. You nailed it this time! It is very beautiful. You have really got the details and edges sharp. 6 hours integration time @ 35sec subs would be over 600 light frames @ 50MB each!!?!?
  3. Thanks again. I’ll buy two strips to be at safer side and just see. Hopefully it manage the winter here..
  4. Thanks for quick reply. I am still a bit worried that the dew heater strips do not warm tube and glass enough. The worst thing is if it freezes.
  5. Winter is coming and I struggled the past days with dew on my Skywatcher 120ED. I have tried to use a self made isolation dew-cap around it, but not good enough (still dew) I have browsed trough the forum and read about dew heaters vs. Dew shield, and figured out that I probably need a dew heater. The temperature here can range from minus 5 to minus 35 degrees celcius, but I dont think I’ll be using the scope when passing minus 20. My question is, which dew heating option would handle minus 10 to minus 20 degrees celcius for my scope? I am afraid that the temperature loss will make the strips not functioning well when passing minus 10 degrees, but I might be wrong? I guess my scooe is around 45cm circumference outside the tube. I am using 220V with adapters to everything else, so power is not an issue.
  6. Thanks again @Lee_P ! I suspect that my filterwheel might do some dust trick to my sensor when I turn it from 1 to 2 and 3.. I will try an over three days shot (after the rainy weeks) with none filters attached to see. Do you differ alot of sub-exposure time when it comes to. Hanging filters, or do you try to keep it the same? @bobro and, thaks for the image adjustments.. You really nailed it! I understand now that image adjustment is another expertise that will take me years to learn… And, thanks for that, so I can improve over the next decade
  7. @Lee_P But, if you use flats for severa hours of imaging, the dust particles should stay at same spot over all 20 hours? I am just thinking that if I move the scope in and out for two sessions on the same M31.. the dustparticles will probably move. And how will the flats be intrepeted then in the stacking??
  8. But, if you do several nights.. How do you manage flats? Do you take a set of flats and darks after each night, or do you do that at the end?
  9. @Lee_P, I think it can be better. It’s what you are saying the longer integration time, the better signal to noise ratio can be achived. As I had to scrap 50% of the frames, and I suspect the remaining percentage also have som dizzy cloud in them, I will test another go for two minute subs over several hours. Just have to wait for clear sky again.. going to rain for 14 days now
  10. Thanks @Ouroboros. I just listened to Dr.Robin Glovers video as a podcast while painting my cabin today. I defiantly have to look at it on YouTube. I am not sure if a formula will help getting the exact sub-shot-time, since when I look at my sky. It seems to be more light polluted in the southern direction than the northern.. And, I also feel that there is a ratio on how many files my computer can handle, compared to noise / exposure time ratio.. So, I will try to follow @Lee_P's two minute exposure times. I will test both lower and higher to see the results... Anyways, the Andromeda shots last night, got a bit blurred due to clouds. So after removing the most blurred, and the ones with satellite tracks (6 of them), I ended up with 49 frames out of 100. all at 2 minutes subs. I got the blacks over the night, but when I was going to take the Flats. The sky where quite moisture and wet, so I gave that up. So this is the result of 49 frames at 2 minutes subs, with gain 100 + 100 darks. Stacked with ZWO ASIDeepStack_1.5 . As you can see, there are some dust spots. The result has not been edited in any ways, it is just the JPEG from the ASI Deepstacker:
  11. Thanks.. after hefty googeling, I found these ones for my ASI2600, https://drive.google.com/drive/u/0/mobile/folders/1CnKISk-4X0pTo6emReMIO099JlgPHIT6?usp=sharing
  12. @iantaylor2uk interesting. What is the reason for extending the sub time depending on filter type?
  13. Not sure about that. You have the little galaxy upper left, but my focal length are clipping it
  14. @Lee_P The satelite photo was taken 21:38 (CET) By the way, Here in Oslo, it is not the light pollution that bother me most, it is rather the weather
  15. @Lee_P Yes! I understood that part, and with all the UFO’s (Satelites?) which I remove , I can achive more effective integration time with quality pics. I still have to check the end result, so my brain accept it as a fact I might do the same with lesser and lesser exposure time if the result is good.
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