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toxic

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Everything posted by toxic

  1. blooming awesome Peter i can spend ages looking at these
  2. i have used the stock 50mm f1.8 at f7.1 and the 70-300mm f4-5.6L at f5.6 and f7.1 for astro and they are great lenses - the Cassiopeia image was taken with the 50mm at f7.1 on the EOS 200D and orion with the 70-300 at F7.1 on the EOS 90D the reason for that f stop is for the stars to be round in the corners and that is all.and both used on the old star adventurer.
  3. that is way to high you need to have it around 10% the lower the more stars it detects
  4. 21st to 22nd from the back garden canon eos 90D with 70-300 f4/5.6L at 300mm on the star adventurer. Orion is 145 times 30 seconds exposures at iso 6400 and the horsehead is 57 times 30 second exposures at iso 6400.
  5. just put a lens on the camera and put it on a tripod focus on a bright object (the moon) and take some short exposures of around 3 to 5 seconds (not of the moon them exposures would be too long and iso too high) with a 50mm lens at iso 1600 to 3200 and take lots of them in raw file format then stack them with deep sky stacker ,for the moon you would need iso 100 and exposure time around 250th to 500th of a second as a test hope this helps.
  6. yes the aperture is the size of the mirror or front element of the telescope and can not be altered by the camera only by physically putting something in front of the lens/mirror so it collects less light by say putting a scope cover on with a hole in it.
  7. you will not be able to change the aperture on the camera as your scope has no iris/aperture blades the only things you can control on the camera are - ISO - CAPTURE TIME .
  8. loads of cheap used dslr's on here https://www.cashconverters.co.uk/search?type=product&phrase=canon+eos&page=1
  9. thanks no the camera is stock and no filters just flats and bias frames no darks
  10. hi i use the Microsoft lifecam 300 hd with a home made adapter to the 9x50 finder (remove webcam lens attach 35mm film canister to front of webcam housing dont forget to cut the bottom of the canister off lol and unscrew back from finder and added a home made tube to it with a 1.25 inch hole to fit the film canister or eye piece) and its still going strong even on the 250 quattro S and thats since 2011 no need to change what works.
  11. yes but if you think about it it isnt actually a longer interval time it is also counting down the exposure time as well
  12. Deneb Area in the constellation CYGNUS showing the north american nebula and the pelican nebula as well as many other deep sky objects. 173 EXPOSURESE AT 30 SECONDS AT ISO 6400 AND F6.3 CANON 70-300 F4-5.6L ON THE EOS 90D AT 70mm on the Skywatcher STar Adventurer. stacked in deep sky stacker and processed in adobe photoshop cs5.
  13. on my intervalometer and canon eos 90D and the 200D you need to add the exposure time to the interval time for it to work properly but thankfully on the 90D it is built into the camera
  14. adobe photoshop cs5 and fitsworks 4
  15. thanks i only did 30 seconds as i have not figured out how to use the onboard intervalometer in the 90D lol
  16. 385 x 30 second exposures at iso 6400 total 3 hours 12 minutes 30 seconds. no darks or flats with the canon 70-300 f4/5.6 L at 300mm and F5.6 on the eos 90D (unmodified) and the SW Star adventurer. 4 different nights of capture. not very good seeing.
  17. they fitted them to the 0ne above my obsy but it didnt stop the light from going strait down lol
  18. yes you can use it wide open without any chromatic aberration remember it is F5.6 at 300mm.if you have or are getting a lens like this make sure you have a tripod mount on the lens you wont want the came supporting the weight of the lens and it has better balance with it you will also need an extra weight for the star adventurer.
  19. i have found with all the lenses i have that the best lens for astro work and day time photography has to be the L series lenses and the one i use the most is the ef 70-300 F4/5.6 L is usm and it will even auto focus on bright stars at 300mm hope this helps
  20. a lot of noise in my image though but no surprise there -- 3 hours , of clear sky in the same week not a chance in Darlington i think i picked the wrong hobby lol but i still love it. to bring the colour up a little bit i just add 20 percent L to each channel blend method is lighten then combine them to rgb then add the L to the rgb at 50 percent luminance.
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