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Just wondering, which DSLR in particular?

by auvi 9y ago

brian_herman 9y ago
Yeah which dslr has this capability?
- giobox 9y ago
  It’s not _exactly_ the same as how the Lytro worked, but you can achieve a small degree of fixing focus in post with the data captured on any of Canon’s newish “Dual Pixel AF” sensors that are increasingly found in their DSLRs. The technique is not a million miles away from what lytro did, in that there are effectively two photosites at each pixel measuring the light hitting it at slightly different angles, which is what gives the ability to fix minor focus issues in Canon’s own RAW processor. The feature isn’t supported that widely in third party RAW converters yet though. https://www.google.com/amp/s/photographylife.com/what-is-dual-pixel-raw-in-the-canon-5d-mark-iv/amp https://www.google.com/amp/s/photographylife.com/what-is-dua...
anentropic 9y ago
it's not a DSLR, but some recent Panasonic mirrorless cameras have this https://www.panasonic.com/global/consumer/lumix/feature/post_focus.html https://www.panasonic.com/global/consumer/lumix/feature/post...
- giobox 9y ago
  This isn’t really all that comparable to the Lytro - this is effectively a hack that takes advantage of some Panasonic camera’s ability to shoot 4K jpeg bursts at 30FPS - it racks the focus as it shoots a burst so you can pick from a range of focus points. The subject can still move noticeably in between shots, it’s not a single shot style solution like the Lytro has. I have a Panasonic m43 camera with this feature and almost never use it, It’s just a fast implementation of focus bracketing and you take a pretty big resolution/quality hit. The new “Dual Pixel AF” sensors in some newer Canon DSLRs is much more like the Lytro, in that focus can be adjusted slightly in a single image capture, no burst capture trickery.
  - anentropic 9y ago
    Yes, it's just focus-bracketing and that's as close as any non-Lytro cameras come to the Lytro feature as far as I'm aware Reading a description of the Canon Dual-Pixel sensor feature https://www.canon.co.uk/cameras/eos-5d-mark-iv/dual-pixel-raw/ https://www.canon.co.uk/cameras/eos-5d-mark-iv/dual-pixel-ra... ...it does not seem that it allows to adjust focus after the fact. It's something different again from Lytro and focus-bracketing. As far as I can tell what it does is to capture depth information into the RAW file. I don't see how it could allow refocusing, but the examples show it allows you to selectively mask areas of the image based on distance from camera. So you can sharpen 'just the eyes' if you slightly missed focus on them. Or selectively blur the front/back out of focus areas to get a stronger bokeh effect.
knolan 9y ago
The Canon 5D mk IV has what’s called Dual Pixel RAW. Here’s a video. https://m.youtube.com/watch?v=HcQ9MSRRvn4 https://m.youtube.com/watch?v=HcQ9MSRRvn4
- rounce 9y ago
  DPRAW doesn't use a light field, it's a stereo image.

Just wondering, which DSLR in particular?

by auvi 9y ago

Just wondering, which DSLR in particular?

brian_herman 9y ago

Yeah which dslr has this capability?

giobox 9y ago
It’s not _exactly_ the same as how the Lytro worked, but you can achieve a small degree of fixing focus in post with the data captured on any of Canon’s newish “Dual Pixel AF” sensors that are increasingly found in their DSLRs. The technique is not a million miles away from what lytro did, in that there are effectively two photosites at each pixel measuring the light hitting it at slightly different angles, which is what gives the ability to fix minor focus issues in Canon’s own RAW processor. The feature isn’t supported that widely in third party RAW converters yet though. https://www.google.com/amp/s/photographylife.com/what-is-dual-pixel-raw-in-the-canon-5d-mark-iv/amp https://www.google.com/amp/s/photographylife.com/what-is-dua...

anentropic 9y ago

it's not a DSLR, but some recent Panasonic mirrorless cameras have this https://www.panasonic.com/global/consumer/lumix/feature/post_focus.html https://www.panasonic.com/global/consumer/lumix/feature/post...

giobox 9y ago
This isn’t really all that comparable to the Lytro - this is effectively a hack that takes advantage of some Panasonic camera’s ability to shoot 4K jpeg bursts at 30FPS - it racks the focus as it shoots a burst so you can pick from a range of focus points. The subject can still move noticeably in between shots, it’s not a single shot style solution like the Lytro has. I have a Panasonic m43 camera with this feature and almost never use it, It’s just a fast implementation of focus bracketing and you take a pretty big resolution/quality hit. The new “Dual Pixel AF” sensors in some newer Canon DSLRs is much more like the Lytro, in that focus can be adjusted slightly in a single image capture, no burst capture trickery.
- anentropic 9y ago
  Yes, it's just focus-bracketing and that's as close as any non-Lytro cameras come to the Lytro feature as far as I'm aware Reading a description of the Canon Dual-Pixel sensor feature https://www.canon.co.uk/cameras/eos-5d-mark-iv/dual-pixel-raw/ https://www.canon.co.uk/cameras/eos-5d-mark-iv/dual-pixel-ra... ...it does not seem that it allows to adjust focus after the fact. It's something different again from Lytro and focus-bracketing. As far as I can tell what it does is to capture depth information into the RAW file. I don't see how it could allow refocusing, but the examples show it allows you to selectively mask areas of the image based on distance from camera. So you can sharpen 'just the eyes' if you slightly missed focus on them. Or selectively blur the front/back out of focus areas to get a stronger bokeh effect.

knolan 9y ago

The Canon 5D mk IV has what’s called Dual Pixel RAW. Here’s a video. https://m.youtube.com/watch?v=HcQ9MSRRvn4 https://m.youtube.com/watch?v=HcQ9MSRRvn4

rounce 9y ago
DPRAW doesn't use a light field, it's a stereo image.