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Thread: Lyra, 1 second

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    Default Lyra, 1 second



    I tripod mounted my Canon IXUS compact and used the long exposure mode, set to 1 second. (f7, ISO 3200)

    I took another shot at 15s but of course the stars trailed.
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    ​There's coffee in that nebula! Opticron 3" spotter, Orion GoScope III 70mm Travel Telescope, Bresser 10x50s, Bresser Hunter 7x50s, Canon 30D and IXUS compact camera, one eye!

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    Default Re: Lyra, 1 second

    Hi,
    I don't know the camera, but can I ask why you shot at f/7? I expect the camera has a faster aperture. For a task such as this I would be inclined to shoot wide open. Besides, I assume this is a tiny sensor camera. If so, at f/7 you are already degrading your image through diffraction effects. You probably have heard that a typical rule for the speed where you have acceptably small star trail is 500/fl. So, if your camera can shoot at 50mm, you can use 10 sec exposures. If you are of a mind to, I'd encourage you to try 500/your shortest FL at your widest aperture. You might be able to bring in a lot more detail. If your camera can shoot raw, use it. I don't know how you processed that. But, the night sky is never really black. I am rightly accused of having a tendency to pull my black point down too far. Perhaps you too share my proclivity. I will say, I have been listening to the elders here and they are right, don't crush your shadows to black (assuming it was you and not the camera that did it;-) and see if you like it better -- I did when became a bit more temperate with the contrast slider. Having said that, your image is nice as it is. Congrats.
    Last edited by rgbtxus; 08-18-2015 at 01:09 AM.
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    Default Re: Lyra, 1 second

    Hi fgb, it's what the camera selected. It's a tiny but powerful compact camera, doesn't have full manual and when you use the preset modes you can't alter the aperture.
    ​There's coffee in that nebula! Opticron 3" spotter, Orion GoScope III 70mm Travel Telescope, Bresser 10x50s, Bresser Hunter 7x50s, Canon 30D and IXUS compact camera, one eye!

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    Default Re: Lyra, 1 second

    Got it. Too bad. To get the most out of ap you will need a camera with more control. It is not unusual to have something like f2.8 available or 3.5. So if you could have selected it you would have collected at least 4 times as many photons
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    Default Re: Lyra, 1 second

    Quote Originally Posted by rgbtxus View Post
    Got it. Too bad. To get the most out of ap you will need a camera with more control. It is not unusual to have something like f2.8 available or 3.5. So if you could have selected it you would have collected at least 4 times as many photons
    I have such a camera, a Canon DSLR, and I have posted pics taken with that camera on here before. But I just love the convenience of this little compact. I mean I can take handheld astro shots with it because it uses stacking within the camera!
    ​There's coffee in that nebula! Opticron 3" spotter, Orion GoScope III 70mm Travel Telescope, Bresser 10x50s, Bresser Hunter 7x50s, Canon 30D and IXUS compact camera, one eye!

 

 

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