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  1. #1
    astrophotona's Avatar
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    Unhappy DSI - planets too bright on screen



    Hi y'all,

    This is my first time to use a DSI camera. I spent 5 hours, yes 5 hours trying to get a decent pic of a planet (tried Mars and Saturn) but all I could get was a bright blob.

    See attached pic of Saturn

    Thanks y'all!
    Attached Images Attached Images

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    astrophotona's Avatar
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    PS: I have an 8" Schmidt Newtonian telescope

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    I cant help with the planet but I do suggest trying a bright streetlight or cell tower to get the feel of using the system it may help practise the problems out, then move on to the astro part

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    If that screen grab is correct, you are exposing at 1 second, which is way too long! use the down arrow, and you will see a difference! Reduce your exposure time!

    Andy
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    You also have gain set at 100%, which is probably not what you want.

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    astrophotona's Avatar
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    Default THANKS, but ...

    Oh thank you all. I tried fiddling about with the exp and gain with Jupiter. When the planet was faint, I couldn't see any details of the planet's surface (or am I not supposed to see any with my set of instruments?) nor could I see the Galilean moons. When the planet was bright, the moons were there on the screen. There is a trade-off between brightness of the planet (which I want to get rid of, and the visibility of the moons which I want to have in my pic badly). I am sure there is a way to sort this out!

    Many thanks again y'all.

    Attached are the pics
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    The way out is to do an HDR mash-up (composite)...take 2 pictures. one xposed for moons and one for planet and merge the 2... there are all sorts of ways/tools to do the merge

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    But, if the pic with the moons has Jupiter so bright, if I merge it with the pic without the moons, the brighter version of the planet would dominate over the fainter version. I have never done any processing before, as I'm totally a newbie to taking astro photos.

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    Phil Leigh's Avatar
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    Thumbs up

    Quote Originally Posted by astrophotona View Post
    But, if the pic with the moons has Jupiter so bright, if I merge it with the pic without the moons, the brighter version of the planet would dominate over the fainter version. I have never done any processing before, as I'm totally a newbie to taking astro photos.
    Trust me... It will work. Google HDR for more info. It's a well established technique, not just for astrophotography. There are some free tools that will let you do it with ease.

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    astrophotona's Avatar
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    Oh thank you. I should try it

    Only thing is, with the current settings all the planets look almost the same: Here is a pic of Mars

    Thanks
    Attached Images Attached Images

 

 
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