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"mirrorless" with optical viewfinder
- Thread starter hunterrichards
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Dan Hudgins
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Holes...
Holes...
Not sure if this has been gone into but I had an idea for an optical finder that might work,
You make small holes near each pixel on the sensor that go through the dark parts to a clear base or all the way through the sensor chip, you can then view through the back of the sensor.
Yes there would be some light loss, but you get 100% duty cycle, and because the holes are always in the image plane you compensate for the OLPF focus shift issues and such to get true focus without any shifts in the optical finder. The small size of the holes make the focus more accurate and you can use a field lens to focus the light that goes through the holes into your eye piece.
So the sensor would be like a piece of "peg board" with viewing from its backside. You would not see the grid because at 4K the pitch is too small to see clearly with a full view optical viewfinder, at 2X zoom you might see the grid a little if you have good eyes, but that would be a help to focus the eyepiece on.
Holes...
Not sure if this has been gone into but I had an idea for an optical finder that might work,
You make small holes near each pixel on the sensor that go through the dark parts to a clear base or all the way through the sensor chip, you can then view through the back of the sensor.
Yes there would be some light loss, but you get 100% duty cycle, and because the holes are always in the image plane you compensate for the OLPF focus shift issues and such to get true focus without any shifts in the optical finder. The small size of the holes make the focus more accurate and you can use a field lens to focus the light that goes through the holes into your eye piece.
So the sensor would be like a piece of "peg board" with viewing from its backside. You would not see the grid because at 4K the pitch is too small to see clearly with a full view optical viewfinder, at 2X zoom you might see the grid a little if you have good eyes, but that would be a help to focus the eyepiece on.
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Pawel Achtel
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No, DP does not need a mirror. DP needs to focus accurately. And this is big difference.
Dan Hudgins
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Stopped down...
Stopped down...
No matter what kind of optical finder a camera uses, it can be very hard to focus well with the lens stopped down through the eyepiece with a ground glass.
My Brother says that DP for the most part should not focus through the eyepiece while the camera is running, anyone have thoughts on that subject?
What he means is that the follow focus is used for focus and the optical finder is used for framing while the camera is running, if that is the case then you should not need an optical finder for framing if you have an electronic one.
If the optical finder is just used to mark the follow focus when the camera is stopped, then you can make a rack over camera with optical finder like the Mitchell, that lets you view the image to focus and then use the electronic finder for framing with the lens stopped down since you cannot see much in an optical finder at f/22 anyway.
A rackover has problems since the OLPF on the sensor may change the focus point for fast lenses, so it is better to use a 1:1 electronic finder to find the follow focus marks anyway.
For documentary/sports use a reflex optical finder could be useful, maybe someone could make a PL mount optical finder with relay optics that would let you use any PL mount lens on any PL mount camera, and have a 10% or 50% tap off optical finder as an accessory since you would not need the optical finder all the time?
Stopped down...
No matter what kind of optical finder a camera uses, it can be very hard to focus well with the lens stopped down through the eyepiece with a ground glass.
My Brother says that DP for the most part should not focus through the eyepiece while the camera is running, anyone have thoughts on that subject?
What he means is that the follow focus is used for focus and the optical finder is used for framing while the camera is running, if that is the case then you should not need an optical finder for framing if you have an electronic one.
If the optical finder is just used to mark the follow focus when the camera is stopped, then you can make a rack over camera with optical finder like the Mitchell, that lets you view the image to focus and then use the electronic finder for framing with the lens stopped down since you cannot see much in an optical finder at f/22 anyway.
A rackover has problems since the OLPF on the sensor may change the focus point for fast lenses, so it is better to use a 1:1 electronic finder to find the follow focus marks anyway.
For documentary/sports use a reflex optical finder could be useful, maybe someone could make a PL mount optical finder with relay optics that would let you use any PL mount lens on any PL mount camera, and have a 10% or 50% tap off optical finder as an accessory since you would not need the optical finder all the time?
Okay, I'm awaiting an explanation. From the specs, it looks like neither Scarlet nor Epic compete in the dSLR space.