1.4x costs you exactly one stop, 2x cost two stops. That's my
understanding. Some sort of geometric, logarithmic scale thingy. I
suppose a 3x costs you 3.141..... stops :-)
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 30/09/2009, at 9:35 AM, Clay Nichols wrote:
> Why are the Olympus teleconverters rated at 1.4x mag instead of
> 1.5x which is half of the 2x teleconverter?
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