[OM] Damn, I'm excited!

[Mike Gordon via olympus]

Congrats!  That is exciting.  It is clearly a superb digital back for Zuikos 
for sure.  The normal range zoom looks quite nice--better than the Canyon 
equivalent but uses a bunch of software tricks rather than optics to get there.
I think , though am not sure it is difficult (w/o using a special converter) to 
avoid the metadata corrections.  


http://www.opticallimits.com/sonyalphaff/1034-sony24105f4goss?start=1

The review seems to get bent out of shape that performance is so influenced by 
the software corrections rather than optics.  I am not sure it  matters that 
much if they do an end run with software to get the goal line where the optical 
double reverse only gets to the 5 yd line.
It is thus smaller too, as the front element would need to be much larger to 
avoid the vignetting.  I read reports of QA issues with this lens--Roger  at 
Lensrentals has tested 10 but I don't see his review up yet. Overall the QA 
with the G series has been as good as Canyon at least.
I think there was a bad batch in Feb with  more focus shift as well.  Some of 
the corrections may have some negative effects, but there are a huge  bunch of 
megapickels to play with. 

Lens Distortion (%) 24mm 105mm 
 Sony 24-105          4.6       3.0 
 Canon 24-105II      3.2     2.0
 Nikon 24-120 3.6    2.1 (120mm)


For long stuff rather use MFT with the relatively reasonably priced and 
excellent performer PL 100-400. 

Mike



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