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spaceman_spiff

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About spaceman_spiff

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    Astronomy; Astrophotography; Computational Neuroscience; Horology; Classical music; Hiking; Jogging, PS4!!!
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    Bury, Lancashire

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  1. From the album Planetary work

  2. From the album Planetary work

  3. From the album Planetary work

  4. From the album Planetary work

  5. From the album Planetary work

  6. From the album Planetary work

  7. From the album Planetary work

  8. Hi A4Andromeda, Good shot there but your 550D has the movie crop mode which is better for capturing Jupiter. Set it at 60 frames/s, ISO 100-800 exposure 1/60 and see what you get. HTH Dan
  9. Very good image - far better than my early attempts on Jupiter. I think you may benefit from increasing your image scale - using a barlow. The optimal scale depends on your pixel size (big pixels demand a longer focal length (more powerful barlow). Also if Jupiter is made larger on the sensor, Registax will have more detail to lock on to and should provide a better result. Sorry if this has already been mentioned, I haven't had time to read through all the previous threads! HTH Dan
  10. I know right! Interestingly the turbulent air seems to settle/rise out of shot quite quickly.
  11. Here's a gif clip from an imaging session I did a few days ago (02/04/2017)...with an unexpected interruption. Dan.
  12. Hi there, I also use a 550D in 640X480 movie crop mode and I get good results with it. As far as Registax goes, I learned the basics from astronomyshed's video, hopefully it also works with Registax 5...
  13. Hi all, I'm in the middle of processing a sequence of videos of Jupiter taken during the Europa transit on 02/04/2017. I recorded videos lasting about 2 mins. I chose 2 minutes primarily because I used it before and got good results. But I wanted to know the exact maximum time I should video before the planet rotates across more than 1 pixel...so I wrote a small program to calculate this. You will need to know the angular diameter of the planet at its equator (you can get this from Stellarium), the pixel size of your camera and the effective focal length or your telescope (including any Barlows). It's written in Python so if you want to run it download Planet_rotation_calc.py and go to your terminal. Change the directory to the folder containing Planet_rotation_calc.py (use cd /folder/Planet_rotation_calc.py). Then type: python Planet_rotation_calc.py The program spits out the theoretical max time you can image before rotation spreads features across more than 1 pixel. In reality, poor seeing and imperfect optics will mean that planet rotation will probably not affect the image if you go slightly over this time. Anyway, please feel free to comment, use, modify and improve the program then post it for others to use. Dan Planet_rotation_calc.py
  14. Hi Peter, I use a balance charger, it controls the current entering the battery based on the voltage reading so it never overcharges. You will need pair of banana plugs wired to crocodile clips to connect the charger to the battery. This is identical to the one I use: https://www.amazon.co.uk/iMAX-B6-LiPro-Balance-Charger/dp/B004A6QEJ6?psc=1&SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duc08-21&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B004A6QEJ6 It works for all types of batteries including lead acid. HTH Dan
  15. From the album Lunar work

    Date: 13/03/2017 Image: A mosaic of panels covering part of the eastern limb of the Moon. The southern panels cover part of Mare Fecunditatis and Mare Spumans. The more northern panels cover Mare Undarum, Mare Margins and some of the crater Naper. These images were taken as the scope was cooling down to image Jupiter. As a result, the stacks are a bit soft and I may have pushed the wavelets a bit hard to show detail. Anyway, this is still an area of the Moon I have not imaged before so it is being added to the collection! Scope and optics and mount: Skywatcher Skymax 150 Maksutov Cassagrain (Fl = 1800mm, F/D = 12). The focal length was doubled using a Televue 2X Barlow giving a focal length around 3600mm and F/D ~ 24. I used a Baader fringe killer to remove residual chromatic aberration. The mount was an EQ5 Pro with an extension pillar. Camera: Cannon 550D in 640X480 movie crop mode at 60 frames/s. ISO 100, exposure = 1/60 seconds. Each movie was about 4 minutes long. Processing: Movies were decompressed and filtered in Pipp, keeping the best 2000 frames, no image stabilisation was used. The decompressed file was then sent to Registax, frames were aligned and only the frames with > 90% quality were stacked, the number of used frames therefore changed for each stack. I then increased the Gaussian wavelets using 80 (1.3), 20 (1.15), 5 (1), altered the Gamma curve, aligned the RGB balance and stretched the histogram to cover 0 - 225. The mosaic was completed using Gimp.

    © D Elijah