Magenta cast on images from Sony DSC-RX10M3
I have just bought a Sony DSC RX10M3, and processed my first images from it in Capture One. (I am very familiar with the application, as I have been using it for years with my other cameras.)
Mostly I shoot using auto white balance (AWB) on the grounds that I can correct it later during raw processing if I need to. Typically, I am finding that shots from this camera using AWB look about right on screen: the tint slider is almost always at about -9.3. But if I choose one of the presets from the DSC RX10M3 profile in Capture One, such as Daylight, the tint slider moves to about 0.0 (or -0.1 in the case of the Cloudy preset) and the image takes on a very pronounced magenta tint.
If I shoot an image with the camera set to Daylight instead of AWB, it shows in C1 as Kelvin 5335 and tint -9.2. If I set it to the Daylight preset in C1, it shows as Kelvin 5312 (so very nearly the same) but tint 0.0, which is quite different and looks very magenta.
It seems as if the profile that C1 is using for the camera is far too much weighted to the magenta end of the tint scale.
(I have submitted a support case, saying this.)
Do any other users of this camera see the same?
Ian
Mostly I shoot using auto white balance (AWB) on the grounds that I can correct it later during raw processing if I need to. Typically, I am finding that shots from this camera using AWB look about right on screen: the tint slider is almost always at about -9.3. But if I choose one of the presets from the DSC RX10M3 profile in Capture One, such as Daylight, the tint slider moves to about 0.0 (or -0.1 in the case of the Cloudy preset) and the image takes on a very pronounced magenta tint.
If I shoot an image with the camera set to Daylight instead of AWB, it shows in C1 as Kelvin 5335 and tint -9.2. If I set it to the Daylight preset in C1, it shows as Kelvin 5312 (so very nearly the same) but tint 0.0, which is quite different and looks very magenta.
It seems as if the profile that C1 is using for the camera is far too much weighted to the magenta end of the tint scale.
(I have submitted a support case, saying this.)
Do any other users of this camera see the same?
Ian
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Hi Ian,
I don't have a Sony DSC RX10M3 but I can tell you that my Sony SLT-A99V has the same problem with the automatic WB of CO and in particular with images shot in daylight. The color tint of the images (raw) out of the camera is mostly around -6.5 and the automatic WB of CO makes it around -1.5 and thus to magenta. With my earlier camera (Sony a900) everthing worked perfect, but with the A99 I can't use the automatic WB.
René0 -
Thanks, René.
I have put in a support case and they agree that images come out too magenta, and they are investigating.
(If I choose, say, the Daylight preset in camera, the tint slider shows in Capture One at about -9.3, and the image looks about right if those were the light conditions. But if I choose the daylight preset in Capture One after the event, the tint slider is at 0.0 and the image looks too magenta. The person dealing with the support case had thought that they would be about the same whichever way you choose the Daylight option, so that is why they are investigating what is going on.)
Ian0 -
Ian,
Have you progressed with a resolution for this in any way?
An acquaintance of mine kindly sent a RAW file from an RX10M3 to play with when I suggested slight tweak to a B&W conversion he had produced might be interesting.
The original image was grabbed in poor weather and light conditions and is very flat with little DR but the exposure sits in the middle half of the histogram. Thus the range can be stretched in both directions.
I tweaked a few things to spread the range on the way to the B&W conversion tool but then realised that the colour version had also come alive (and is now my chum's preferred version). The thing is I didn't see anything in the image during any of the edit process that suggested a magenta cast so I am wondering if I missed it or it's something that was not apparent in V9.3.
I have to say that, for a "bridge" camera (albeit one that demands a high price), I have been very impressed with the results I have seen so far. Whether speed and handling would be in line with what I feel comfortable with is another matter. Likewise DoF questions. But the resulting images and lens reach are very tempting for a single package carry-about.
Grant0 -
Hi, Grant
I have left the question of the magenta cast with Phase One in the hopes that they might improve their profile for the camera at the next release. To clarify, the issue is that when you select a preset white balance in Capture One, the result is not the same as if you select the same preset in camera. So for example, the in camera Daylight WB shows in Capture One as 5335K and -9.2 Tint. But the preset in Capture One shows up as 5312K and 0.0 Tint, and creates a pronounced magenta cast. I can understand that Phase One's own measurements can produce a slightly different Kelvin value from Sony's, because they create their own profile for the camera (and the same goes for all the cameras I have) but on the Tint they just seem to have it wrong (or neglected to dial in a value?). They seemed to agree with me that the two should be about the same.
If you have set the WB in the camera, the results look right in Capture One. (Also if you use auto WB it often comes out looking right although as ever, the camera can be fooled in some lighting conditions.)
My work-round has been to create some user presets. I took shots using the Daylight, Cloudy and Shade settings in the camera, noted the K and Tint values that showed up in Capture One, and saved them as presets which I called RX10 Daylight, RX10 Cloudy and RX10 shade. Having once done that it is not too much different to choose one of those instead of one of the built in presets. (My habit is to use auto WB almost all the time and correct it in Capture One later if needed.)
My reasons for getting the camera in addition to a D7000 and a D7200 were as you suggest to get an attractive single package carry about. The zoom range is fantastic. The image quality at low ISOs is excellent. I'd say that at high ISOs there is a bit more noise than there would be from a larger sensor, as you would expect. It is only 13.2 mm x 8.8 mm. Ken Rockwell explains here why this is marketed as a one-inch sensor, when it is really not. But he still likes it a lot. Here's a sample image of mine which I took at 500 ISO, and it's cropped to 4421x2947. Look at the monkey's fingers, for example, at 100%. I think the quality is excellent.
So I'm pretty pleased with the camera, and the tint business is a bit of an annoyance but easily worked round.
Ian0
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