Patent: Variable Diffusion Focusing Screen
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Mitch.Conner said:
The difference is that at FS.com you can buy something today, this variable FS is just a patent. Who knows when or if it will ever be produced.
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And forgive my ignorance but why aren't modern DSLRs fitted with split prism focusing screens. I shot with a Canon AE-1 and/or A-1 for 20 years and never, ever missed focus on anything. I was 50/50 in focus with the 5DII and 70-200 2.8 Mk I. Now with the 5DIII and 70-200 MkII I'm about 90% in focus but still...
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Cool stuff! I wonder if this would work in conjunction with Canon's existing transmissive LCD and all the visual cues and feedback available in their current OVFs.
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This can't be a reality too soon!
I would love for it to come in combination with a split prism moved closer to the dioptre in the viewfinder - well out of the way from any sensors in the path.
I would love for it to come in combination with a split prism moved closer to the dioptre in the viewfinder - well out of the way from any sensors in the path.
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This is absolutely an exciting concept. But to be honest, I feel like the reality is nothing can be assumed from just a patent.
Canon has patents for all kinds of crazy cameras and lenses. They have a patent for a 24-70mm f/2.8 IS but have yet to produce a consumer-ready product following this patent.
Not to say they are 100% not innovative, but I don't think this patent relinquishes them from their recent downfalls until the technology actually comes to fruition.
Canon has patents for all kinds of crazy cameras and lenses. They have a patent for a 24-70mm f/2.8 IS but have yet to produce a consumer-ready product following this patent.
Not to say they are 100% not innovative, but I don't think this patent relinquishes them from their recent downfalls until the technology actually comes to fruition.
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very cool, assuming it is precise and quick enough to really work well which it might not be, but if it actually somehow is....
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This would be great. I assume future cameras would come with it (and/or with more easily swappable screens). It's probably too much to ask that you could send in your 5D or 7D to have it professionally retrofitted with one of these when the day is realized. I've read that replacing the focus screen yourself if you don't know what you're doing can be a dangerous proposition (and I don't know what I'm doing).
I often manual focus with live view. It's good, it works. But I would prefer a better screen, or at least the option.
I often manual focus with live view. It's good, it works. But I would prefer a better screen, or at least the option.
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Bennymiata
Canon Rumors Premium
A great company is not made from their patents, but from their products.
Come on Canon, get this to market -- ASAP!
Come on Canon, get this to market -- ASAP!
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justaCanonuser
Grab your camera, go out and shoot!
This could save DSLRs a bit of a longterm future market... I'd love having this already in my 5D3 and 7D. For my old 7D I am seriously considering to get a split microprism screen but this would be on the cost side of losing LCD enhancement. Could also be sometimes helpful if you want to MA fast Canon primes.
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Maximilian said:
Its quite common in interior design, make a door or seperation wall transparent/frosted/darkened on the press of a button, or by a slider on your cell phone.
The most public use I can think of would be in the ICE high speed trains - sudden whiteout? Likley a sheep that didn't make it off the track in time? Or something akin.
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Love the patent idea.. would give precision manual focussing at any point across the screen, unlike a split prism...
Dumb question / suggestion.
Zeiss/anyone else making MF lenses should offer a free/cost-price split prism focusing screen for a DSLR of the purchasers choice when buying a lens.
Given the cost of a Zeiss lens there's got to be financial room in there to do this... they could include a fitting service too.
That would have to increase sales!
Dumb question / suggestion.
Zeiss/anyone else making MF lenses should offer a free/cost-price split prism focusing screen for a DSLR of the purchasers choice when buying a lens.
Given the cost of a Zeiss lens there's got to be financial room in there to do this... they could include a fitting service too.
That would have to increase sales!
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that1guyy said:
How do you figure? If this enables you to take that one special photo that would have otherwise been out of focus, then to me that's pretty useful.
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Yeah! But it is much easier to just do this to a wall with the same effect over one whole area.Lawliet said:
The smart thing here is, that the camera must know by AF, aperture and much more data, which parts (!) of the area must stay clear (because in focus) and which must be blurred (because oof).
Even with an EVF or live view screen this is tough. but with an in camera DSLR focussing screen...?
Just WOW!
(please correct me, if I get this patent wrong)
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Maximilian said:
Unfortunately, I think you have misunderstood slightly. The screen isn't changing diffusion locally based on where the image is or is not in focus, it's changing the global diffusion. Think of it like the regular focus screen and the Super Precision Matte focus screen. The SPM screen has a higher diffusion, which makes it easier to visually distinguish between areas that are in or out of focus, but with the downside that it doesn't work well with slower lenses because it transmits less light. The tech in this patent essentially emulates the ability to instantaneously choose between a regular and SPM screen (and anything in between).
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