philipus
ʎɐpɹəʇɥƃı&
As I have understood it, it is complicated - very complicated - to make such a high performance lens so small. The lens would have become much larger were it to have been an f1.4 design with floating element.
Another aspect of Leica's decision to release this lens as a Summicron rather than a Summilux is that the difference between f2 and f1.4 is virtually none for digital photographers. And, like it or not, it is to that segment of photographers that Leica today caters.
Someone might add that, hey, the DOF at the widest end will be different between the APO and the ASPH. There's truth to that statement only insofar as all lenses render differently. So a keen eye may be able to discern difference in the out of focus rendering of these two lenses but I wager that the difference between them, being both modern designs, will be far less than between the APO and the pre-ASPH.
Some might say that f2 will be perceptibly different to the depth of field that a Summilux may be able to produce at f1.4. In actual fact, however, the difference in DOF at 1m between the APO and the ASPH is less than a centimetre, 0,02896m vs 0.002027m.
As always there will be photographers who must have the latest and greatest Leica gear. Those are usually the types who buy an M9-P as their first rangefinder and believe that it must, absolutely, be paired with the latest in lens design.
Another aspect of Leica's decision to release this lens as a Summicron rather than a Summilux is that the difference between f2 and f1.4 is virtually none for digital photographers. And, like it or not, it is to that segment of photographers that Leica today caters.
Someone might add that, hey, the DOF at the widest end will be different between the APO and the ASPH. There's truth to that statement only insofar as all lenses render differently. So a keen eye may be able to discern difference in the out of focus rendering of these two lenses but I wager that the difference between them, being both modern designs, will be far less than between the APO and the pre-ASPH.
Some might say that f2 will be perceptibly different to the depth of field that a Summilux may be able to produce at f1.4. In actual fact, however, the difference in DOF at 1m between the APO and the ASPH is less than a centimetre, 0,02896m vs 0.002027m.
As always there will be photographers who must have the latest and greatest Leica gear. Those are usually the types who buy an M9-P as their first rangefinder and believe that it must, absolutely, be paired with the latest in lens design.