Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
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Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#2Here are some pictures. https://www.dragonflytelescope.org/gallery.html
It uses a raspberry pi for each lens(https://www.raspberrypi.com/news/dragonfly-spectral-line-map...)
Early paper about the telescope. https://ui.adsabs.harvard.edu/abs/2014PASP..126...55A/abstra...
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#3Unfortunately their website is not built from a large, redundant array of off-the-shelf server parts.
Here's a mirror,
https://web.archive.org/web/20240507234024/https://www.dunla...
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#4Unfortunately their website is not built from a large, redundant array of off-the-shelf server parts. Here's a mirror, https://web.archive.org/web/20240507234024/https://www.dunla...
This article talks about the upgrades they recently (2022) made to the telescope array and has a few example images.
https://www.dunlap.utoronto.ca/new-dragonfly/
The publication resulting from the work, "Giant Shell of Ionized Gas Discovered near M82", can be found:
https://iopscience.iop.org/article/10.3847/1538-4357/ac50b6/...
The companion publication from Yale, "Nascent Tidal Dwarf Galaxy Forming", can be found:
https://iopscience.iop.org/article/10.3847/2041-8213/ac3ca6/...
Edit: And, actually from the post below, full publications related at:
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#5RAIT (Redundant Array of Inexpensive Telephoto lenses)?
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#6Anyone know what sensor they are using behind all that nice Canon glass?
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#7That write up could have used significantly more details. Is this competitive with a traditional telescope? 1/1000 the cost? Just the benefit of not having to share instrument time? Being able to incrementally expand the array?
Some kind of technical measurement for me to better appreciate the work.
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#8Cool.. a more up-to-dateish version of Wide Angle Search for Planets (WASP[1] and SuperWASP[2])
[1]https://warwick.ac.uk/fac/sci/physics/research/astro/researc... [2]https://www.superwasp.org/about/
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#9Anyone know what sensor they are using behind all that nice Canon glass?
- "Each of the eight lenses in the array is connected to a Santa Barbara Imaging Group (SBIG) STF-8300M CCD camera. These cameras have Kodak KAF-8300 CCD detectors, which have a 3326 × 2504 pixel format."
https://arxiv.org/abs/1401.5473 ("Ultra Low Surface Brightness Imaging with the Dragonfly Telephoto Array")
Re: Dragonfly: An optical telescope built from an array of off-the-shelf Canon lens
#10RAIT (Redundant Array of Inexpensive Telephoto lenses)?
Not that inexpensive - that's a $12000 lens with a nearly 6" aperture. The telescope itself is a fairly specialized instrument. It's more like a redundant array of very fast (for a telescope) lenses. From the paper: "Our primary goal is to test predictions that at very low surface brightness levels galaxies display a wealth of structures that are not seen at higher surface brightness levels." (But yes, the lenses are going to be cheaper from Canon than the tubes would be from a specialized telescope maker).