![]() ![]() ![]() Everything worked well and I could see that the image testpic1.jpg had been saved. This meant that I was asking the raspistill program to output an image called testpic1.jpg to my home/pi folder. It is run from a command line interface, so I clicked on the ‘Terminal’ icon at the top of the screen to bring up the command line prompt. The image-capturing program within the Raspberry Pi OS is called raspistill. ![]() The camera is attached to the Raspberry Pi via a supplied 20-centimetre ribbon cable. So I screwed the adaptor onto the HQ camera and inserted it into the back of the Megrez 72. I already own a planetary camera from The Imaging Source that I knew had a C-mount and came with a 1.25-inch adaptor to go into the back of a telescope. I wanted to try out the camera coupled to a William Optics Megrez 72 telescope (a 72mm doublet refractor with a focal length of 432mm). I then rebooted as instructed and the camera was good to go. I attached the camera to the Pi with the supplied cable, booted everything up and enabled the camera interface in the ‘Configuration’ options. It attaches to the Pi via a ribbon cable: a 20 centimetre length of cable is supplied with the camera, but longer cables are more convenient and can be bought for a few pounds. The HQ camera is small, on a board measuring 38mm square. I wondered how suitable this camera would be for astrophotography, so I ordered one as soon as they became available. More interesting is the version three’s ‘High Quality’ (HQ) camera, with a 12.3-megapixel Sony sensor and no lens attached – instead any C-mount or CS-mount lens can be fitted, or there are adaptors available to attach other lenses, such as a DSLR lens or even a telescope. These cameras are not suitable for astrophotography, since the lens is glued to the sensor and the focus can’t be adjusted. Version two used an eightmegapixel sensor, also with a fixed-focus lens. I am no expert in Linux – all you need to know is that the OS is freely downloadable and that it boots into a desktop environment similar to Windows.Ĭameras have been released for the Pi in the past: version one used a fivemegapixel sensor, with a fixed-focus lens attached. Each Pi runs an operating system called Raspberry Pi OS (previously known as Raspbian), which is a version of Linux optimised for the Pi’s hardware. I own a Pi 3 Model B+, which offers a 1.4 GHz processor and 1GB of RAM, all for less than £40. A series of different Pi models have been released since 2012 all are inexpensive and fun to play with. It is credit-card sized, using a ‘system on a chip’ that integrates the components of a computer in a single computer chip. The Raspberry Pi is the best-selling British computer of all time. Raspberry Pi compatibility: Works with all Pi models with a camera connector (all recent models) Ribbon cable length: 20cm, supplied with the camera Lens compatibility: C-mount and CS-mount lenses ![]()
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