[knc1]

Is there life in this old thread of mine?
I hope so, the KT2 is still disassembled, waiting for me to get on with this exposure.

On the subject of exposure, perhaps no more jury-rigged digital camera for close-ups.
Instead, (I admit it, a low cost) digital microscope.

Sample attached.

Picture is of two 'standard' SMD pad layouts.
Using Gimp, or your other favorite image tool, you can count the pixels/mm in this view.

I come up with .033mm per pixel or 33 microns per pixel (vertical).
If the smallest detail of interest is 0.1mm, then this gives 3 pixels for that detail.
The smallest (common) trace width is 6mill (.006 inch), which is about 5 pixels in this sample.

This should be sufficient for PCB close-ups.
(And its a lot easier to use than my jury-rigged digital camera.)
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Edit:
Next picture, the serial port pads on a K4S (because someone recently posted that a K4 didn't have a serial port).
This **is** a close-up, works out to 72 pixels/mm.
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Edit:
Next picture, the KT2