On May 16, 2005, at 4:23 PM, Rob Studdert wrote:
this lens offers focal lengths equivalent from 76.5mm to 306mm (in the
35mm format)
So, I guess Pentax is using a "1.53" conversion factor...
Which is technically more accurate than 1.5, the factor is 43.27mm/28.40mm
...
And given that marked focal lengths on most lenses are often more than .03x different from actual focal length ...
Godfrey
