Arjay
Time Traveller
While I agree with you that some kind of C/O/C/O shutter action will be required in shooting a series with 'continuous' (or better intermittent) AF, IMO it isn't clear whether a mechanical shutter needs to be part of this action.Also, be aware that the X100 is capable of 5 F/s; and the live-view shutter must do a C/O/C/O in every shot. So the total shutter action cannot be too bad.
When using contrast-detect autofocus (CDAF), the camera goes through a cycle of the following actions as the shutter is pressed:
- shutter press to AF position
- CDAF focusing with subsequent 'in focus' confirmation
- Shutter press to capture position
- switch off live-view mode
- clear pixel buffer (delete last live-view picture)
- prime pixels (equivalent to start of first focal plane shutter curtain)
- End exposure (equivalent to start of second focal plane shutter curtain) and pixel buffer readout to memory card
- Return to live-view mode
So, the actual shutter lag (steps 3 through 7) could indeed be minimal if these steps could be performed exclusively in electronics.
This still leaves us with two questions:
- Can steps 3 through 7 be exclusively executed electronically - how will the individual sensor pixels be protected against 'blooming' (pixel charge bleeding to neighboring photosites in case of massive overexposure - this was one of the shortcomings if the Nikon D70's hybrid shutter concept)?
- How long will the CDAF-based focusing lag be (Steps 1 & 2)? These steps will forcibly have to be performed in some kind of live-view mode, and could be omitted for the second shot and up in a rapid-fire shot sequence.
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