For every av value it was off by the same 194 units
it may be able to set it as high as F32.2
Quote from: barberofcivil on 11 / November / 2009, 10:55:47For every av value it was off by the same 194 unitsWhich is fractionally more than two stops.The SX10 fully open aperture varies from 2.8 to 5.7 as you zoom, fractionally more than two stops !
Quote from: barberofcivil on 11 / November / 2009, 10:55:47it may be able to set it as high as F32.2With all due respect, you cannot be serious ?CHDK hackers try to push the limits Canon have imposed without understanding why those limits exist.(the same goes for absurd claimed shutter-speed overrides).
Due to diffraction, image resolution would be terrible.
This discussion is useful because you have given me an idea.In SDM I will remove the highest shutter-speeds that can be used as overrides.I will replace by just a few (maybe to 1/15,000 sec) that are true shutter speeds in terms of halfing of exposure.That will mean doing tests and replacing the calculated Tv96 values in the table with the values obtained from experiment.
I will use a light source so bright that at 1/1000 sec the hitogram does not quite reach 255.I will only be reducing the exposure by 16x (four stops).I have a CSI light source for a microscope that is so bright I only dared turn it on once !