Sensors. K-50 vs K-3. Any difference?

matt269 · 05-23-2015, 11:25 PM

K50 shoots raw

Sandy Hancock · 05-24-2015, 12:00 AM

Originally posted by Dewman

aside from having more MP, is the K-3's sensor more capable of color rendition?

Apart from the excellent processing tips already mentioned, the K-3's RAW files are 14 bit colour depth, while the K-50's are 12 bit.

matt269 · 05-24-2015, 12:08 AM

Shooting in raw helps them

stevebrot · 05-27-2015, 05:12 PM

Originally posted by normhead

For deep reds you underexpose slightly.... and process with levels to even out the channels.

Yep...ditto for deep or bright yellows. The tendency to block up red and yellow is common to all digital sensors and is related to the response curve of the sensel itself* at the red end of the spectrum. Likewise, there are color fidelity issues at the blue end of the spectrum traceable to poor sensitivity at those wavelengths.

In theory, the RGB metering system on the K-3 should be capable of detecting those cases where red or yellow or are likely to block up and should adjust the exposure down in response. The meter on the K-50 is not capable of that level of discrimination.

Steve

* Not all colors are created equal. Some pack more of a "punch" than others. This is true for CCD and CMOS as well as Bayer/non-Bayer designs.

stevebrot · 05-27-2015, 05:14 PM

Originally posted by Sandy Hancock

Apart from the excellent processing tips already mentioned, the K-3's RAW files are 14 bit colour depth, while the K-50's are 12 bit.

Good point! As a result, the K-3 RAW should hold shadow detail better than the K-50 for those cases where a little minus exposure compensation is warranted.

Steve

GlennG · 06-05-2015, 06:06 PM

Originally posted by UncleVanya

I keep meaning to drag out my K100D Super to see if it can render the reds.

Nothing scientific or calibrated, but I think my K100d Super pretty much over saturates and mashes the detail in reds. Jpegs SOOC, nothing raw.

MadMathMind · 06-05-2015, 06:23 PM

I also have issues with reds--they come out hypersaturated and not quite the right color. I have to dial down the red saturation a bit if I increase vibrance or saturation (general) in light room. The hue also needs fumbling with as well.

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05-23-2015, 11:25 PM	#16
matt269 New Member Join Date: May 2015 Posts: 6	K50 shoots raw

05-24-2015, 12:00 AM	#17
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,267	Originally posted by Dewman aside from having more MP, is the K-3's sensor more capable of color rendition? Apart from the excellent processing tips already mentioned, the K-3's RAW files are 14 bit colour depth, while the K-50's are 12 bit.

05-24-2015, 12:08 AM	#18
matt269 New Member Join Date: May 2015 Posts: 6	Shooting in raw helps them

05-27-2015, 05:12 PM	#19
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by normhead For deep reds you underexpose slightly.... and process with levels to even out the channels. Yep...ditto for deep or bright yellows. The tendency to block up red and yellow is common to all digital sensors and is related to the response curve of the sensel itself* at the red end of the spectrum. Likewise, there are color fidelity issues at the blue end of the spectrum traceable to poor sensitivity at those wavelengths. In theory, the RGB metering system on the K-3 should be capable of detecting those cases where red or yellow or are likely to block up and should adjust the exposure down in response. The meter on the K-50 is not capable of that level of discrimination. Steve * Not all colors are created equal. Some pack more of a "punch" than others. This is true for CCD and CMOS as well as Bayer/non-Bayer designs.

05-27-2015, 05:14 PM	#20
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Sandy Hancock Apart from the excellent processing tips already mentioned, the K-3's RAW files are 14 bit colour depth, while the K-50's are 12 bit. Good point! As a result, the K-3 RAW should hold shadow detail better than the K-50 for those cases where a little minus exposure compensation is warranted. Steve

06-05-2015, 06:06 PM	#21
GlennG Veteran Member Join Date: Aug 2010 Location: Houston, Texas Posts: 824	Originally posted by UncleVanya I keep meaning to drag out my K100D Super to see if it can render the reds. Nothing scientific or calibrated, but I think my K100d Super pretty much over saturates and mashes the detail in reds. Jpegs SOOC, nothing raw.

06-05-2015, 06:23 PM	#22
MadMathMind Veteran Member Join Date: Dec 2013 Location: Houston, TX Photos: Gallery Posts: 1,717	I also have issues with reds--they come out hypersaturated and not quite the right color. I have to dial down the red saturation a bit if I increase vibrance or saturation (general) in light room. The hue also needs fumbling with as well.

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