Astro RaspberryPi Camera

A wireless RaspberryPi Prime Focus Astrophotogaphy Camera

Webcams and planetary cameras are compact and take great images, but they require a laptop computer to control the camera and capture image data. The Astro Raspberry Pi camera uses the Raspberry Pi deck of cards sized computer and it's camera module to create a camera that can be wirelessly controlled by a cell phone and saves data on a local memory card.

The slides and a PDF download from my 2015 talk at the Texas Star Party are on Slide Share:

With a long focal length telescope like the Questar (about 1350mm to the camera), the narrow field of view can make finding your target difficult. With my setup there was also a couple of seconds delay in viewing an image via the wireless connection to the iPhone. The delay make focusing a difficult process. A software focusing aid that could provide a visual focus quality indication would be very helpful. Good results are possible with the setup I used. A full moon mosaic took 72 images:

Raspberry Pi Moon
This was one of my very first full disk Moon shots. Made on the Questar with the Raspberry Pi camera that I built myself. The 72 images that I stitched together here, helped convince me that I wanted a camera with a larger sensor and field of view. Full Moon + 1 day mosaic with 72 images stitched with Hugin via the Raspberry Pi and Questar 3.5. The Alpine Valley is visible in the high resolution versions.

The image below shows Jupiter's great red spot and it's moons Io and Europa:

Jupiter imaged with a Raspberry Pi Camera
My first good image of Jupiter with the Great Red Spot using the Raspberry Pi camera that I built. Io and Europa are to the right. Raspberry Pi camera at prime focus through a Questar 3.5". 240 of 500 images stacked using Lynkeos and sharpening via deconvolution, wavelet, unsharp masking with a little noise reduction and color balance.

Overall I found the small sensor size of the Raspberry Pi camera very limiting for astrophotography. I'd like to be able to find a sensor with a much larger size to use with the Pi.


Good news on the RaspberryPi astrophotography front. The Instrument Neutral Distributed Interface (INDI) is a cross platform software library to control astronomical instruments. It is available for the Raspberry Pi. I'm hoping that it will provide a way to capture data from and control high functionality astronomical cameras from the Raspberry Pi. The RaspberryPi could be headless running the INDI service and providing capture storage for a USB connected camera.

An app like the CloudMakers INDI Control Panel could provide the user interface. This would be a more capable version of the ultra-portable astrophotography platform that I'd wanted when I began the RPiCam work. I have a ZWO ASI120MC planetary camera and will be trying it out with the Raspberry Pi and report back on the results.

The image below was taken with the ZWO camera (captured using a MacBook rather than the Raspberry Pi). Compare the results to the image of Jupiter above. It would be great the have this quality of result using a RaspberryPi and phone without needing a laptop.

Jupiter at opposition 2017 - Revisited
Jupiter with moons Io, Europa, and Ganymede (L to R) from Austin, Texas 2017-04-07 10:25 PM CDT. Questar 1350/89 mm telescope with a Dakin 2X Barlow lens and ZWO ASI120MC planetary video camera. Gain 46, exposed 77 msec captured in oaCapture running on macOS. Best 52 of 2000 exposures stacked at 1.5x in the amazing Autostakkert 2 and deconvolved in Lynkeos. RGB aligned to reduce atmospheric diffraction. Final crop and exposure tweaks in Photoshop.

Content created: 2016-06-08 and last modified: 2017-04-15

Translate                

     

Comments


Submit comments or questions about this page.

By submitting a comment, you agree that: it may be included here in whole or part, attributed to you, and it's content is subject to the site wide Creative Commons licensing.