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| p.14 #1 · Sony Cyber-shot DSC-RX1R Full Frame with no AA filter |
Shutter speed, hand holding technique, atmospheric conditions, lens optimization distance, accurate focus, ambient temperature (i.e. some folks, not any of us , think slam to infinity stop means focused to infinity, etc.), ambient lighting, etc.
Apologies for spewing with no experience at the specific camera in question, but there are a myriad of reasons other than the sensor that could influence why infinity isn't to the level that one is expecting ... the sensor is likely to be one of the last things I'd think of when wondering why a shot of mine would have infinity to not be uber-sharp to the Nth degree.
While there might be a difference between AA vs. non-AA (I shoot both), I've never considered it to be an issue related to infinity vs. closer distances. Imo, anything that is going to have a difference between one portion of the scene vs. another (i.e. infinity vs. mid vs. near) is going to be either a product of the optical projection (lens) or the technique or the subject.