"Paul Furman" wrote in message
t...
SNIP
What are the DR ratings for various DSLRs?

They can/could extend to the full 12-bit (4095:1) range that the
DSLR's ADC provides, give or take half a bit quantization error.
Boosting that to the 32767:1 or 65535:1 working space range will help
to allow for post-processing rounding errors, before reducing that to
the 126:1 printing range.

Bart