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  1. #1
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    Default Light pollution



    I live in the middle of the city, and usually, drive 15 minutes out to a place somewhat darker. I want to take pictures of deep space objects, any tips? I have Orion XT6 and I usually use my phone with a mount to take pictures.
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    Default Re: Light pollution

    Drive even further. Nothing beats a clear dark sky.
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    My eyes
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    Default Re: Light pollution

    Mono and narrowband filters or get out of town!

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    :gso/bintel f4 12"trust tube, bresser
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    ar127s /
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    Corrector,
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    Default Re: Light pollution

    With your 6" push-pull f/8 dob you will have a very tough time trying to photograph DSO's. Even the brightest DSO's will be too dim, and without some type of equatorial tracking, your exposure times will be very short. Filters are not going to help you at all, these make the exposure times longer. A darker sky only a marginal improvement. What pics you are able to take will not be anywhere like the fancy pics people take with more sophisticated equipment.

    Now, for the Moon and planets, things are better. As these are brighter, they are easier to photograph. You can also take an AV file with your phone, and then process the file with a software package such as Registax, and it is possible to produce quite a nice picture. No tracking in the mount is needed as the software aligns the frames. This system actually makes for a very good starting point for astro imaging. This is how I started put too, and I went to the extent of modifying a webcam to fit the focuser. The phone's camera controls are pretty good for this too.

    I hope this helps you.

    Alex.
    Last edited by mental4astro; 03-13-2018 at 06:52 AM.

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    Default Re: Light pollution

    Oh, and to AF!

    Alex.

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    Default Re: Light pollution

    Welcome to the forum.

    I agree with a lot of what mental4astro said. I do cellphone AP as a primary part of outreach and would consider a motorized mount of any kind a bare minimum for cellphone AP when it comes to DSOs. Even with an f/5 and shooting at high ISO something like M42 still takes seconds long exposures to show much of anything. As focal length or focal ratio increases, tracking becomes even more important. Not saying you can't take shots of DSOs without tracking, but as you can see HERE it severely limits things.

    Where cellphone AP really shines is in bright planetary, lunar and binary splitting. The tiny pixels, higher sensitivity, and fast frame rate 4K video of higher end phones these days allow them to pick up details that most dedicated cameras and DSLRs simply can't without a lot more effort.

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    Default Re: Light pollution

    Hi Vinee and welcome to the forum. Some excellent information you've already received and I know you'll enjoy your time here.

    Bob


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    Default Re: Light pollution

    Hello and Welcome to the Forum!
    Michael
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    Default Re: Light pollution

    Welcome to the forums Vinee
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    Default Re: Light pollution

    So... i have a phone with a phone that i can take 4k videos up to 20 mins... then it records a another video ... until the internal memory gets full ...

    soooo this is getting interesting since I have a alt-azi go-to mount with a 102 skyprodigy ... and on manual settings i can ISO 3200 and 30 secs... in theory I can get a telescope cell phone holder adapter, use the light pollution/moon filter on the diagonal and use the 25mm eyepiece or even the 9mm to take some video or picts ...

 

 
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