Will this work to capture star light at night? I am trying to build an All Sky camera to view the stars.

I had previously answered this from the standpoint of trying to achieve good framerates while still managing to capture stars, and had reported that of course this is pretty much impossible. These particular cameras do not force high amplification, so unlike the ELP 1080P FHD01 USB cameras, you can't get high framerate motion in low light at the cost of high noise. With these OV5647 Arducam boards, you have to drive the framerate very low, costing you pretty much all sense of motion in the scene (except for where streaks are considered acceptable) but you can in fact collect fairly decent starlight. I only figured this out in the last day so that's why I didn't mention it before. It's not like using a good DSLR because the gain is low on these, but.... if you pass THIS to the camera, you can do some pretty interesting things for astro applications:raspistill -q 100 -w 2592 -h 1891 -ISO 3200 -ss 5000000 -ex sports -t 10000 -o longexp.jpg-q drives the image quality to 100%-w and -h specify the capture resolution.2592 x 1944 maxes this camera out, important for pinpoints like stars. I used 1891 for the height to push it to wider aspect but still avoiding the zoom in effect that happens at wider angle aspects. Try 1920x1080 to see what I mean.-ISO 3200 tells it to push the gain on the camera all the way. This is a bit past the specs of the cam to make sure it milks everything it can get.-ss specifies framerate in microseconds. I played with this value A LOT under dark sky tests and found that 5,000,000 microseconds was pretty much the max limit.-ex sports sets the capture to "sports mode", which is suprisingly important. It pushes performance out of the camera like none of the other modes can.-t 10000 forces the camera to time out and take the picture after ten seconds. I found that I could eliminate this and do fine. Increasing it does nothing for me.-o of course specifies the output filenameUsing this you'll get some noise but quite a lot of stars in capture, and since it's quite long, it's good for meteor trails as long as they are reasonably bright. The NOIR version of the cam really helps with that since it picks up on very hot objects especially well.

a direct replacement to the Pi v2 camera? (dimensions are different, but the Jetson Nano requires the v2 sensor, yet I want telephoto)

We can meet your needs but that is not for sale on Amazon and please contact Arducam sales representative at info@arducam.com

Is the included lens wider angle than the camera with no lens? Does anyone know the field of view?

Horizontal Field of view: 84 degrees Vertical Field of view: 63 degrees Diagonal Field of view: 105 degrees Without the lens it is just a sensor, so you won't have a focused image. The camera module is useless without a lens.

Standing screen display size	2 Inches
Max Screen Resolution	1920x1080 (1080p Full HD)
Wireless Type	Infrared
Brand	Arducam
Series	B0031
Item model number	B0031
Operating System	Linux
Item Weight	0.81 ounces
Package Dimensions	2.1 x 1.6 x 1.6 inches
Color	M12 Lens Camera for Raspberry Pi
Power Source	Battery Powered
Manufacturer	Arducam
Language	English
ASIN	B013JTY8WY
Is Discontinued By Manufacturer	No
Date First Available	August 7, 2015

Arducam

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