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Roll Your Own All-Sky, Raspberry Pi Camera
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Re: Roll Your Own All-Sky, Raspberry Pi Camera
#22Having done this… - don’t make your camera the highest thing around. My dome was showing scratches. Eventually I got a nice photo of the inside of a juvenile bald eagle’s talon. A bird’s gonna perch where a bird’s gonna perch. Sacrifice some sky and put a better perch next to it. - the manual focus cameras seem to be temperature dependent. Maybe get something that can be auto focused or add a heater to control night…
I've definitely run into the long exposure heat issues. In my hemisphere, the central part of the Milky Way is best viewed during the summer. In my local part of the hemisphere, its ridiculously hot at that time. Even 20s exposures will be noisy. I have a smaller pelican case that I've punched a hole in for the lens to sit outside the case, and then rigged a bunch of those reusable freezer packs for coolers inside. Then covid happened, and I now no longer have a car. To this day, I haven't taken it anywhere to test it out. Now, I'm really sad that I just realized how long it's actually been since I've imaged the sky.
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#23Having done this… - don’t make your camera the highest thing around. My dome was showing scratches. Eventually I got a nice photo of the inside of a juvenile bald eagle’s talon. A bird’s gonna perch where a bird’s gonna perch. Sacrifice some sky and put a better perch next to it. - the manual focus cameras seem to be temperature dependent. Maybe get something that can be auto focused or add a heater to control night…
> Maybe have something in there that is colder Such as?
John Riccitiello's heart?
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#24Having done this… - don’t make your camera the highest thing around. My dome was showing scratches. Eventually I got a nice photo of the inside of a juvenile bald eagle’s talon. A bird’s gonna perch where a bird’s gonna perch. Sacrifice some sky and put a better perch next to it. - the manual focus cameras seem to be temperature dependent. Maybe get something that can be auto focused or add a heater to control night…
Do you have your pictures or videos posted anywhere? Trying to decide if the juice is worth the squeeze.
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#25How do you prevent the sun from damaging the sensor over time?
I have had an all sky camera out for about two years now without issue, also never heard of anyone having an issue. The first I've heard is the comment above about using a spotting scope, which would have a much larger objective than a typical all sky camera, and sounds like the Bayer array (the filter for color imaging) was damaged. I imagine most sensor manufacturers know their sensors will get pointed at the Sun and some point, and are designed to account for it. Especially since pictures of Sunsets/Sunrises are pretty popular.
The Sun is actually pretty small (1/2 a degree), and the image of the Sun will only occupy a given pixel for about 2 minutes. The next day, the declination of the Sun will change, there may be some overlap in the pixels it falls on. But over the course of a year, the amount of time a given pixel will see the actual image of the sun is pretty short, likely less than 10 minutes for the worst case near the solstice. And the pixels getting it near the equinox will probably only get hit for 4 minutes a year, and some not at all. So they're not really taking the beating it may seem.
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#26Is there a MIPI camera that doesn't suck? I have every official Pi camera, and they are all just terrible. I would never use them for anything artistic, when it's easy to get far-superior results from even a cheap regular camera or used SLR. I'm just curious if there's a very-high-quality camera with a MIPI interface. Thinking it through... I only really care about video. Even if it's only HD resolution, something wi…
>Is there a MIPI camera that doesn't suck?
No there isn't. Sorry. I've tried them all and their dynamic range sucks so bad....
Anyway, who thinks otherwise, I recommend you see the same non-ideally lit scene with for example a modern "analog" fpv camera like Foxeer Nano Toothless 2 (a starlight 0.1lux camera that maintains it's great dynamic range in full sun).
The only mipi camera that has a shred of a chance to compete is starvis IMX327LQR. On paper it should be pretty good. I'm planning to test one at some point.
Also, the cameras built into various Cctv Ip cameras one can buy from China are pretty good, but good luck getting them to work with anything other than the original equipment.
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#27Having done this… - don’t make your camera the highest thing around. My dome was showing scratches. Eventually I got a nice photo of the inside of a juvenile bald eagle’s talon. A bird’s gonna perch where a bird’s gonna perch. Sacrifice some sky and put a better perch next to it. - the manual focus cameras seem to be temperature dependent. Maybe get something that can be auto focused or add a heater to control night…
> Maybe have something in there that is colder Such as?
Peltier element
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#28Anyone knows how did they make the beautiful diagrams?
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#29Having done this… - don’t make your camera the highest thing around. My dome was showing scratches. Eventually I got a nice photo of the inside of a juvenile bald eagle’s talon. A bird’s gonna perch where a bird’s gonna perch. Sacrifice some sky and put a better perch next to it. - the manual focus cameras seem to be temperature dependent. Maybe get something that can be auto focused or add a heater to control night…
> Maybe have something in there that is colder Such as?
I would guess a Pelletier element?
Re: Roll Your Own All-Sky, Raspberry Pi Camera
#30Anyone knows how did they make the beautiful diagrams?
This, diagrams and imagery were top notch.