There's something confusing about reproduction ratios and sensor size crop factor.
For example, some lenses states 1:2 reproduction ratio, this means the image formed on the negative will be half the size of the actual object (2cm object becomes 1cm on the film).
With DSLRs, the introduction for crop factors has confused me a bit. Taking a 1.5X crop factor (for easy math) does that mean that the object is 'apparently' 1.5X bigger? Even though the actual image formed on the sensor is the same as a full frame sensor (or negative)
Am I right to say for 1:2 lenses it now appears to be 1:1.3?
I'm applying the same theory of the focal length where 100mm is now appearantly 150mm.
so 1:1 lenses are now "1.5:1"