Imaging-resource är betydligt mer kraftfulla i sin kritik av denna kameras distorsion vid raw-filer. Klicka på ovan länk och läs från rubriken Geometric Distortion. De skriver:
"To see how much correction is taking place in the camera, we converted RAW files from the above shots with dcraw, which does not correct for distortion. As you can see, at wide-angle, the barrel distortion is extremely high at about 3.8%, while barrel distortion at telephoto is a relatively low 0.5%.
It's not at all unusual these days to see fairly significant distortion in uncorrected RAW files, as this gives the lens designers greater flexibility in optimizing center sharpness and other aberrations, as well as in reducing cost, size, and weight. The downside is that the distortion correction contributes additional blurring to the corners of the frame, where lenses are usually already a bit soft. Also, if you're using a RAW converter that doesn't understand the embedded "opcodes" to perform distortion corrections automatically, you'll have to make the corrections manually in your image-editing software. Most RAW converters these days are capable of applying distortion correction automatically, as specified by the manufacturer."
(Min fetstilsmarkering.)
Verkligen synd att kameran brister i kvalité just här, särskilt för oss som helst använder oss av raw.
Ja visst, jag har också läst hela texten/testen, från Imaging-Resource , - 28mm, vid användning av RAW!
Mina tidigare utdrag, var just från Imaging-Resource.
Vill du jämföra RX100, vid 28mm brännvidd med en svindyr Leica eller Zeiss 28mm optik?
Canon, Nikon och Sony 28mm optik uppvisar alla också en viss optisk förvrängning, dock svagare, men den finns där, 35mm är därför min favorit vidvinkel, något enklare, att konstruera, därav billigare, nästan ingen optisk förvrängning alls.
Det handlar om hur mycket optiken får kosta, hur klumpig den skall vara, samt hur tung, nästa allt går att konstruera, men det skall kunna säljas också.
http://www.imaging-resource.com/PRODS/sony-rx100/sony-rx100A4.HTM
”…….It's not at all unusual these days to see fairly significant distortion in uncorrected RAW files, as this gives the lens designers greater flexibility in optimizing center sharpness and other aberrations, as well as in reducing COST, SIZE and WEIGHT. The downside is that the distortion correction contributes additional blurring to the corners of the frame, where lenses are usually already a bit soft……”
Canon S100 uppvisar vid inte korrigerad RAW, en ännu större optisk förvrängning, i sitt yttersta vidvinkelläge!
http://www.imaging-resource.com/PRODS/sony-rx100/sony-rx100A.HTM
”……The Canon S100's uncorrected RAW images ARE EVEN MORE DISTORTED than the RX100's images, which could also cause much of the softening we see in the corners on that camera, addition to the usual suspects of coma, curvature of field, and chromatic aberration. Chromatic aberration is also low overall, probably processed out by the camera…….”
Min uppfattning är, - det finns ingen bättre kompakt kamera, idag till försäljning, ännu iaf!
