JohnH
13-04-2007, 01:44 PM
I recently saw a question posted elswhere (can't recall now might have been the IP forum) about binning and DSLRs. It got me thinking - like this....
When I use my Canon 20D at prime I am getting about 0.73" per pixel, typical seeing is about 2-3", probably worse so my image is oversampled.
Given this I could drop the resolution in the camera to Small/Fine (1.4"/pixel) and not loose any detail? Now this does mean I end up with a jpeg so is this heresey? Processing wil be faster....how does the res shift work in a Canon is it binning or part of the compression routines (I assume the latter as the sensitivity does not go up).
OR
If I shoot at full resolution then any feature smaller than 2x2 pixels is noise and could be removed with a simple filter?
This must be too simple what am I missing?
When I use my Canon 20D at prime I am getting about 0.73" per pixel, typical seeing is about 2-3", probably worse so my image is oversampled.
Given this I could drop the resolution in the camera to Small/Fine (1.4"/pixel) and not loose any detail? Now this does mean I end up with a jpeg so is this heresey? Processing wil be faster....how does the res shift work in a Canon is it binning or part of the compression routines (I assume the latter as the sensitivity does not go up).
OR
If I shoot at full resolution then any feature smaller than 2x2 pixels is noise and could be removed with a simple filter?
This must be too simple what am I missing?