I hesitated before doing the noise tests, because I thought I knew how it would turn out. I shot my usual noise test subject with both cameras at f/8, 1/15 second, ISO 3200, manual focusing with the 12x setting: I processed the images in Lightroom 4.3 with noise reduction turned off, and default sharpening. Then… [Read More]

Some people have reported position dependent color casts with the RX-1. I see virtually none. What’s more, I measure very little in the way of cast. Here are my results for the center and the four corners, measured in CIEL*a*b*, using the methodology described here. One unit of distance in the equation D = sqrt(L*^2… [Read More]

The RX-1 doesn’t have the chromatic aberration that afflicts the Zeiss 24mm f/1.8 on the NEX-7. Look here for NEX-7 pictures. Here’s a scene with high-contrast corners (tree branches against sky) with the RX-1 wide open, with Lightroom lens corrections turned off, but in-camera chromatic aberration correction turned on: Here’s what the branches look like… [Read More]

I checked to see if the soft corners wide open on the RX-1 were because of lack of field flatness. When I focused on a corner, the corners were very marginally sharper than when I focused on the center. However, the center was greatly softened when I focused on a corner when compared  to when… [Read More]