I\'ve been following this thread with some dismay.
I had hoped that the Alpha 7 or 7r might be a suitable FF replacement for my current APS format Ricoh GXR A12 (Leica M mount) camera. Unlike the NEX (and apparently the Alpha 7) the Ricoh does not suffer from chromatic aberrations, loss of peripheral sharpness or the visible distortion in Phillip Reeve\'s initial test shots at the beginning of this thread.
Ricoh attribute this to a series of \"micro lenses\" over the sensor, optimized for Leica RF lenses. I suppose a generic mount like the Sony E adapted to Leica M couldn\'t be expected to provide such specific performance goals. As they say \"Jack of all trades, master of none\".
Ok, then why switch?
I simply want a FF sensor so that my 50mm f/2 lenses will function as 50mm f/2 lenses (instead of 75mm f/2.8 as they do on an APS crop sensor). I find it highly ironic that the Sony Alpha 7 only performs well with very long lenses, negating that advantage.
\"Magenta Hue\"
This is most certainly due to spherical chromaticism or axial chromatic aberration, and it is a function of the lenses, not the camera.
I have several lenses which exhibit spherical chromaticism, manifest as a magenta hue to objects which are sightly closer than the plane of focus and a green hue to objects slightly behind the plane of focus. I set up a simple test rig to demonstrate this effect. The worst examples I have are my most modern lenses. This one, for example.
I\'ve been following this thread with some dismay.
I had hoped that the Alpha 7 or 7r might be a suitable FF replacement for my current APS format Ricoh GXR A12 (Leica M mount) camera. Unlike the NEX (and apparently the Alpha 7) the Ricoh does not suffer from chromatic aberrations, loss of peripheral sharpness or the visible distortion in Phillip Reeve\'s initial test shots at the beginning of this thread.
Ricoh attribute this to a series of \"micro lenses\" over the sensor, optimized for Leica RF lenses. I suppose a generic mount like the Sony E adapted to Leica M couldn\'t be expected to provide such specific performance goals. As they say \"Jack of all trades, master of none\".
Ok, then why switch?
I simply want a FF sensor so that my 50mm f/2 lenses will function as 50mm f/2 lenses (instead of 75mm f/2.8 as they do on an APS crop sensor). I find it highly ironic that the Sony Alpha 7 only performs well with very long lenses, negating that advantage.
\"Magenta Hue\"
This is most certainly due to spherical chromaticism or axial chromatic aberration, and it is a function of the lenses, not the camera.
I have several lenses which exhibit spherical chromaticism, manifest as a magenta hue to objects which are sightly closer than the plane of focus and a green hue to objects slightly behind the plane of focus. I set up a simple test rig to demonstrate this effect. The worst examples I have are my most modern lenses. This one, for example.
I\'ve been following this thread with some dismay.
I had hoped that the Alpha 7 or 7r might be a suitable FF replacement for my current APS format Ricoh GXR A12 (Leica M mount) camera. Unlike the NEX (and apparently the Alpha 7) the Ricoh does not suffer from chromatic aberrations, loss of peripheral sharpness or the visible distortion in Phillip Reeve\'s initial test shots at the beginning of this thread.
Ricoh attribute this to a series of \"micro lenses\" over the sensor, optimized for Leica RF lenses. I suppose a generic mount like the Sony E adapted to Leica M couldn\'t be expected to provide such specific performance goals. As they say \"Jack of all trades, master of none\".
Ok, then why switch?
I simply want a FF sensor so that my 50mm f/2 lenses will function as 50mm f/2 lenses (instead of 75mm f/2.8 as they do on an APS crop sensor). I find it highly ironic that the Sony Alpha 7 performs better with very long lenses, negating that advantage.
\"Magenta Hue\"
This is most certainly due to spherical chromaticism or axial chromatic aberration.
I do have some lenses which exhibit spherical chromaticism, this is manifest as a magenta hue to objects which are sightly closer than the plane of focus and a green hue to objects slightly behind the plane of focus. I set up a simple test rig to demonstrate this effect. The worst examples I have are my most modern lenses. This one, for example.
