No clue about the 40/3.5, 1:1, Macro.
The 38/3.5 Macro does not go to 1:1 and would reach about 1:2 on its own. It is superb lens (sharp, high contrast, etc). It is one my all time favorite macro lenses (out of a several dozen) from any system.
There are no flowers around so I cracked a nut.
38/3.5 Zuiko Macro, f/11, 4s tripod, cable release, suitable lighting
and photographed a small (<1cm long) pendant.
38/3.5 Zuiko Macro, f/16, 6s tripod, cable release, suitable lighting
As is the case with most macro shots, lighting is the key. There are literally dozens of macro lenses I can mount/use on the G1 but the size and performance of the 38/3.5 can't be beat.
Something else that is very
unique about the 38/3.5 is that this is the only lens that can be mounted
DIRECTLY (with a shim, as I mentioned previously) and without an adapter and can be used for infinity to close ranges. This is possible because of the long focus helicoid in the macro lens.:thumbs: