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About wxsatuser

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    Blue Straggler
  • Birthday 05/04/55

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    Weather satellites
    Gscale trains
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    West Sussex
  1. Don't worry you are doing ok, learning curves are quite steep in this game. Noise is always a problem for dslr cameras, if you can get guiding, dithering will certainly help with the noise.
  2. The chap does say it's a down and dirty way of doing it. You can try other videos and pickup bits and pieces here and there. Some other tutorials were mentioned, try them all. It takes time to pickup everything PI can do and just take your time and eventually it will come. I don't claim to be an expert at PI or any other software and know how hard the learning curve is.
  3. I beg to differ, it's pretty obvious it's aimed at me considering I was only trying to help. Well it's a pity you never jumped in and gave the OP a set of procedures to try in the first place instead of, 'it will be a great image'. It was'nt meant to be a perfect example, just something he could try and move on from there. I will leave it there and you experts can get him on his way, but give him more than, it will be a great image.
  4. Three of my favorites and two fingers to Ophelia

    A few fence panels is a lucky escape. A7 certainly takes very nice short subs.
  5. This is what a linear dslr image looks like, viewed in Canon DPP and the second image is the same file with a tone curve as you would see on the back of the camera. As you see the linear has virtually no colour and is very dark with no contrast. It's up to you and your software to get the best out of it. BTW DSS Autosave tifs will look exactly like the linear image, very dark etc. Linear Tone curve applied
  6. Thing is if we are dealing with RAW files it's up to you to bring out the colour. It's exactly the same for daylight photography, RAW files are dark, lacking colour, contrast etc. It really is upto the photographer to get the best out of RAW, don't expect DSS to do this for you. DSS via dcraw decodes the RAW's but you will not get colour like you see on the back of camera display, as that is a processed RAW, normally a jpg. AFAIK DSS does not discard colour but there is a setting if you think the images are to grey.
  7. Here is a simple set of processes that will get you near a reasonable image. https://youtu.be/dmy8bsdLejA
  8. This about normal for DSS, and a common gripe from newbies, you have to bring out the colour. It will be colourful on the camera screen as it's a processed jpg, processing done by the camera. It's your job in DSS and other software like Photoshop to bring out the colour, sharpness etc, afterall you are working with RAW files. It's the same for daylight photography if you work with RAW, you have to do the processing in a RAW converter There may be not huge amount of colour, looking at your single sub, 180secs with an ED 80 is not a lot. Bright stars will tend to look white but will have a colourful halo, at 3 minutes you not getting much nebula so you are missing colour there, longer exposures will help.
  9. Lacerta MGEN II - no ST-4 output

    The only time mine messed about was when I disconnected the leads while still powered. It would'nt play ball until I switched it on and off.
  10. Lacerta MGEN II - no ST-4 output

    Just a thought, see if the contacts in the ST4 port are ok.
  11. Lacerta MGEN II - no ST-4 output

    Not had any problem here, touch wood. Have you tried another cable just in case?
  12. Help, no idea what went wrong!

    That's not my quote, btw. I don't see why DSS should not stack correctly unless the OP has some setting wrong. If he would like to let us have the subs some way, we can have a go at stacking and see whats wrong.
  13. You will want an even bright light source to start with. Shoot RAW files. Keep the light train exactly as for taking the lights. Use a low ISO or same ISO as lights if stacking with DSS. Expose the source so the histogram peak is in the middle. If the exposure is longer than a second you may need dark flats. Dark flats are exposures same settings as flats but with everything capped off. Take a minimum of 16 flats and dark flats.
  14. Using lower iso ?

    It's nothing to do with DSS as such, it's the result of the stacking procedure on the SNR. If you use darks you don't actually need bias as the bias is in the darks and will be subtracted anyway.
  15. The Sun Through Sahara Sand

    We have daylight back but a yellow sky.