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02-06-2017, 02:38 PM - 1 Like   #1
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Metalens - revolutionary concept in optics

Technically inclined Pentaxians may want to check the story about metalens. In short, the team at Harvard came up with idea of completely flat (!) and thin (!!) lenses, which actually are not 'lenses' any longer as principle of operation is different. Will it lead to a revolution in optical equipment? I think nobody, including inventors, can tell it at the moment, but the story is interesting nevertheless. Try to imagine Bigma reduced to thin piece of glass

02-06-2017, 04:45 PM   #2
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Fascinating stuff. It might end up as "photography, but not as we know it." Thanks for posting this.
02-06-2017, 07:29 PM   #3
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There are so many things out there in the future that we can't even imagine today. It is all moving so fast we hardly notice anymore. Pretty amazing stuff is being developed in so many areas. Exciting...and for old guys, kind of scary?

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02-06-2017, 07:44 PM   #4
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A novel approach, but as can be seen with their model: there are a lot of internal reflections, backscattering and diffraction - which is problematic with such a design.

02-07-2017, 12:56 AM   #5
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Metalenses is maybe decades from being mature and ready for the commercial market. As for now, they are mostly a physics curiosity show off thing. Not very useful. In addition to those problems Digtitalis mentions, they are highly dependent on wavelength. They only work well in terms of resolution in laser light. Making them work for a broader spectrum will sacrifice resolution.
02-07-2017, 06:40 AM   #6
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it's likely a hybrid system will roll out first, with metalensing replacing the zooming elements. We are living in the beginning of a revolution in materials sciences. This will be interesting to watch.
02-07-2017, 07:00 AM   #7
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I guess we'll see commercially available Fresnel elements in super-telephoto lenses before we see a metalens. Has any lens manufacturer brought a fresnel lens for a DSLR yet?
02-07-2017, 07:22 AM - 1 Like   #8
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QuoteOriginally posted by pete-tarmigan Quote
I guess we'll see commercially available Fresnel elements in super-telephoto lenses before we see a metalens. Has any lens manufacturer brought a fresnel lens for a DSLR yet?
Like these?

AF-S NIKKOR 300mm f/4E PF ED VR | Interchangeable Lens for Nikon DSLR Cameras
EF 400mm f/4 DO IS II USM

Nikon uses the designation PF - Phase Fresnel, Canon uses DO - Diffractive Optics. There are a few other models by each manufacturer with those designations.

02-07-2017, 10:21 AM   #9
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I'm going to start saving for a K minus 1 200 megapixel camera with 400mm f1.2 pancake lens.
02-07-2017, 10:33 AM   #10
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QuoteOriginally posted by Apet-Sure Quote
200 megapixel camera
Don't be afraid to dream big - why not 200 gigapixel camera? But seriously - metalens are at very early stage of development, but I hope we will see some serious practical implementations soon (i.e. in few years).
02-07-2017, 02:07 PM   #11
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I thought that had been announced already?
SCOOP! Changes in Ricoh/Pentax Full Frame Plans! | New Camera News
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