Erik Kaffehr
Veteran Member
Bad writing on my part...I think maybe Erik meant "requiring" not "allowing".Why would OSPDAF allow faster readout times?Hi,As a 907x owner I can only confirm that 50mp is absolutely good for 99,9% of works.
the fields of improvement for H are AF speed and maybe IBIS, the rest is already more than good enough for any pro use.
The main reason for having 102 MP is not the need of resolution, but proper handling of the image projected by the lens.
To that comes that the new sensor is a much improved design, over the old one. Some key technologies:
Backside Illumination:
Dual gain architecture:
- Makes better use of sensor surface by moving the wiring behind the photo sensitive layer.
- Reduces pixel level vignetting.
- Reduces optical cross talk.
Improves DR at medium ISOs and higher, by reducing readout noise.
Gapless microlenses:
- Reduces aliasing
- Improves quantum efficiency
In this comparison all the images are scaled to around 45 MP. Which camera deliver the cleanest image?
Also, the 102 MP sensor supports phase detection AF, allowing for more efficient focusing and faster readout times.
The correct writing would be: Also, the 102MP sensor phase detection AF, allowing for more efficient focusing. It also has faster readout times.
The readout times are obviously faster, as the 102 MP sensor can handle 6FPS while the 50 MP sensor has only 3 FPS. That would also mean that electronic shutter has twice the speed.
The focusing system uses local (windowed) readout modes. It would be feasible to assume that those readout modes are better optimized for mirrorless, but I don't think we know.
BTW, Ming Thein, who used to be in charge of strategy at Hasselblad, wrote on his blog that the 50 MP sensor was optimized for DSLRs, while the 102 MP sensor was designed with mirrorless in mind.
We don't know at which level PDAF is implemented. Would it be easy to add PDAF to the 50 MP design, Sony would probably made it. Some posters suggested that the 50 MP sensor is no longer made, that is the vendors use existing stocks. We don't know.It affects the toppings, but also the silicon must support the OSPDAF system requirements.AFAIK, OSPDAF is optional and not an integrated part of a sensor technology.
Phase One uses a different sensor, as it is 54x41 mm size. We don't know if that sensor supports PDAF.See the distinction between requiring and allowing.I believe that Phase One uses the “same” sensor and M11 likely as well. Neither has OSPDAF.
If Phase One is a single customer, it may be quite probable that the sensor is made to their specifications, especially as the 54x41 mm sensor requires a different set of masks to 44x33 mm.
I would guess that the Leica M11 is a manual focus camera. So, having PDAF would be zero advantage.
My personal stance may be that having a sensor without PDAF and a camera without IBIS may make some sense when shooting on tripod and focusing manually.
Best regards
Erik
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Erik Kaffehr
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Magic uses to disappear in controlled experiments…
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