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Old 01-10-2019, 08:11 PM
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Exfso (Peter)
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Check this out for a lens.

https://www.dpreview.com/news/7079598727/the-world-s-largest-optical-lens-has-been-delivered-for-massive-3-2-gigapixel-digital-camera
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Old 01-10-2019, 09:53 PM
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Thanks for post Exfso.

Apparently its aperture is 8.4m with a 9.62 deg^2 FOV and it's situated in Chile !

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Last edited by JA; 05-10-2019 at 11:28 AM. Reason: Corrected Focal length as aperture !!! and added FOv
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Old 02-10-2019, 05:42 AM
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One can only dream and droooooool.
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Old 05-10-2019, 07:12 AM
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A better video is here -
at least it has sound:


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Old 05-10-2019, 11:41 AM
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Thanks for the Video Alpal.

It's amazing that it has a FOV 9.62 deg^2 with an aperture of 8.4m!!!

That's the same FOV (close enough) to something between a 600mm focal length lens (7.9deg^2) or Tak FSQ106 (10.1 deg^2) on FullFrame, except that the "lens" has an 8.4m aperture. That would make it something around a f/0.06 (give or take the central obstruction)!!!

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Last edited by JA; 05-10-2019 at 11:51 AM.
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Old 05-10-2019, 12:35 PM
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Quote:
Originally Posted by JA View Post
Thanks for the Video Alpal.

It's amazing that it has a FOV 9.62 deg^2 with an aperture of 8.4m!!!

That's the same FOV (close enough) to something between a 600mm focal length lens (7.9deg^2) or Tak FSQ106 (10.1 deg^2) on FullFrame, except that the "lens" has an 8.4m aperture. That would make it something around a f/0.06 (give or take the central obstruction)!!!

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JA



There is nothing like this ever in history.
I'm sure it will make great discoveries.
Also - data of the same area from night after night could be stacked
to go deeper and deeper to reveal dimmer structures.
Imagine if you could stack 1000 frames of the same area?
I don't know if the present stacking software could handle such large frames at 3.2 gigapixel per frame!

If everyone is given access to the data then amateur astronomers could
download that data & by stacking make new discoveries.
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Old 05-10-2019, 11:31 PM
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Quote:
Originally Posted by JA View Post
Thanks for post Exfso.

Apparently its aperture is 8.4m with a 9.62 deg^2 FOV and it's situated in Chile !

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JA
its big, but it didn't look like 8.4 meters?
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Old 06-10-2019, 12:26 AM
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its big, but it didn't look like 8.4 meters?
The largest of the lenses was "only" 1.57m, but the mirror serving it was 8.4m according to the video above.

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JA
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Old 06-10-2019, 07:56 AM
gary
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In this 9m39s video, presenter Dianna Cowern, on her "Physics Girl"
YouTube channel, was lucky enough to be invited to be at SLAC
for the unveiling of the lenses :-

https://youtu.be/33UMkPe93Ko
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