Losing DoF


Link Posted 27/10/2014 - 08:25
In a recent competition it was remarked that although I'd set the aperture (aperture priority)to F/16 the camera had apparently decided that f/8 was sufficient. Is this a fault/bug with Pentax cameras and how can I get the aperture I want to use ie f/16 and not f/8 in this case.



Link Posted 27/10/2014 - 10:33
You must have it in some sort of program mode Stan, and
it's changing to a better combination of aperture/speed.

Manual mode is probably the safest to ensure f/16, but make
sure that the lens isn't defracting too much at f/16.

I keep meaning to try some of my lenses to see which performs best
at f/16.

Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff



Link Posted 27/10/2014 - 10:48
Thanks Algi. I'll have a look at the original RAW image and see what the exif says.



Link Posted 22/12/2014 - 02:06
If I remember correctly, on some Pentax DSLR, there is an option to override the setting inputted by the user if a proper exposure can't be obtained. Worth looking into.
Yves (another one of those crazy Canucks)


Link Posted 22/12/2014 - 09:38
Yes, this is called 'auto ev compensation' and might be affecting things. On my camera it is on custom menu 2, Off is 1, on is 2 ... When on it's supposed to change one of the exposure variables if whatever the user set would result in poor exposure. I haven't tried it, but I wonder .. Does it operate if you're just, like, half a stop off the meter centre, or do you have to be more like 2 our 3 stops out?
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