Does the 12-50 really do 1 to 1 as some are saying? I have read it doesn't its .36x and does .76 on the 4/3 sensor (I can't confirm if this is correct. You can't trust half of what you read on the internet). But isn't that half of what you get from a Canon crop SLR with a macro lens? Does the 60mm give you a 2 to 1 magnification with the 4/3 sensor? I don't have a clue what the magnification is on a LX5, I would be interested in knowing for comparison.
I'm still not sure how the macro capabilities on this lens compare to the 60mm, will the 60 give you more than 2.5 times the magnification? how does it compare to a 60mm canon on a crop. I just interested in magnification factor.
Mag factors are tricky because they change with the format. "1;1" is a generic term that refers to filling the frame with an object the same size as the sensor. So, in full frame 35mm terms, "1:1" means filling the frame with a subject 24 x 36mm. This is the max magnification of almost all macro lenses for 35mm format. In 4/3 terms, "1:1'" means filling the frame with an object roughly 12x16mm, the appox size of the 4/3 sensor. There is so much confusion over this that it is far better to just know the size of the object that will fill the frame to get an idea of the lens' relative capabilities.
So, here goes. The following is based on actual real-world shooting verified by other posts I have made. Forget about any internet speculation or references to the Oly published specs, which, as it turns out, are WRONG
The 12-50 lens in macro mode will fill the frame with an object 24x35mm in size (a standard SD card for example). Thus, the mag factor equals 1:1 in 35mm format, and 1:2 in 4/3 format. REgardless, it is extraordinary macro performance for a zoom lens with no need for diopters, adapters, converters, etc., plus instant switching back to semi-wide zoom mode in the dedicated port.
The 60mm lens will fill the frame with an object roughly 12x16mm. That is "2:1" in 35mm terms (true ultra-macro with no diopters needed), and 1:1 in 4.3 terms.
For either lens, you can add a diopter for even higher mag. You will quickly find, however, that no diopters are needed unless you are devoted to the semi-microscopic subject range.
As for getting the macro port 65 to "save" money, I have many posts on why this an illusion. The cost of the port and the Austrian zoom gear is only about 250 less than the dedicated Nauti port and gear. You have no access to the lens' excellent macro mode which is wasted, and you have to add the cost of an expensive diopter (200) to even equal the magnification of the macro mode, so you are spending the same money with a huge inconvenience factor in that you have to mess with installing/removing the diopter in order to get back into zoom mode. The Nauti and Oly combo offers the most versatile lens to ever grace UW photography, why waste it over 50 in savings on such an expensive system anyway?