#2. "RE: D800 and Pixel Density" In response to In response to 0 Thu 15-Mar-12 09:44 PM by agitater
>My question would be isn’t the pixel density every bit as >important as the raw pixel count as we conjure with how this >new beast is going to operate and how touchy it may be to >camera movement or sloppy focus techniques etc.
Pixel density and pixel count are inextricably related. It is the pixel count in within a finite area which determines the density.
If you have very large pixels - hence fewer - within the same finite area (FX), resolution is lower because fewer pixels are available to record detail. At the same time, very slight movements of the camera (e.g., while shooting handheld) do not normally result in very much blurring when shooting at 1/125s and using average technique.
If you have very small pixels - hence many more - within the same finite area (FX), resolution is higher because more and smaller pixels are available to record detail. At the same time, very slight movements of the camera (e.g., while shooting handheld) cause blurring when shooting at 1/125s using average technique. Each incrementally higher shutter speed you try for the same shot, using the same technique, will usually result in increasingly sharper images up to a point at which the shutter speed is high enough to overcome most of the effect of any slight movement, but where increasing shutter speed any more will compromise your exposure (i.e., you run out of both appropriate aperture and usable ISO).
Another way to look at it is purely by considering pixel density. Take the case of an FX 12.3mp sensor and an FX 36mp sensor being used sequentially to shoot the exact same subject at the exact same focal length, framing, shutter speed, aperture andn ISO. If your slight, handheld camera shake move the camera +/- a millimeter or two, the 12.3mp sensor may record some blur. Shoot with the 36mp sensor though, and the same amount of camera shake will affect many more pixels - ergo, more apparent blur than in the 12.3mp sensor.
The thing to keep in mind is just that it's not the camera sensor or its AF system which is causing the blur. It's the shaky photographer.
Another way to look at it is that the more pixels that are available to record information in a defined area, the more easily the camera can record blur caused by shake, tremor, pumping, wind, etc., along with finer detail in the scene/subject being photographed.