Forget the math. That's already been done for us. I'd like to know
what is the meaning of and impact in human perceived color of an LX5
with score of 75 relative to an A900 with score of 87. Will I declare
the LX5's image positively ugly and not at all reminiscent of real color
or will I say: Yeah, I can see the two aren't quite the same. :-)
Chuck Norcutt
On 4/2/2012 7:16 PM, Jim Nichols wrote:
> That makes interesting reading, Mike, but is pretty deep for someone like me
> who last dealt with college math in 1950. ;~)
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From:<usher99@xxxxxxx>
> To:<olympus@xxxxxxxxxxxxxxxxx>
> Sent: Monday, April 02, 2012 5:45 PM
> Subject: [OM] Better color
>
>
>> Some might recall a cryptic reference to SMI ( Sensitivity Metamerism
>> Index) in a comment of one of Jim's nice images. Just in case it is of
>> some interest, here is the link to better explanation.
>>
>> http://www.dxomark.com/index.php/About/In-depth-measurements/Measurements/Color-sensitivity
>>
>> A value of 50 is the difference in color between a daylight illuminant
>> and an illuminant generated by fluorescent source--a "modest" error.
>> Cell phone cams said to be in 40 range.
>>
>> Note DSLR's are crunched into the 75-85 range but still appears
>> interesting with no claim to be a be-all/end-all measure of color
>> performance . Sony A900 is waaay up there and considered to have
>> excellent and
>> accurate color at base ISO. Stronger colored filter array does lead to
>> worse higher ISO performance as fewer photons are available.
>> Canyon 5D classic in a blinded study judged to have excellent skin
>> tones (a tough test) and 5DII perhaps slightly less so. 5Dc way up
>> there at 84.
>> Hmmm.
>>
>> Color me correctly, Mike
>>
>> Ranks:
>>
>>
>> A900: 87
>> 1Dsiii: 86
>> A77: 86
>> Nex-7: 85
>> 1Dsii: 85
>>
>> A550: 84
>> 5D: 84
>> Nex-5N: 84
>> Nex-5: 84
>> A55: 84
>>
>> Nex-C3: 83
>> D700: 83
>> KM 7D: 83
>> D2Xs: 83
>> A100: 82
>>
>> A850: 82
>> 1D IV: 82
>> S5 Pro: 82
>> NX11: 81
>> IQ180: 80
>>
>> EP3: 80
>> 5Dii: 80
>> D3x: 79
>> D800: 78
>> D7000: 78
>>
>> K5: 78
>> 7D: 78
>> T2i: 78
>> D4: 77
>> X100: 77
>>
>> GH2: 77
>> 1Ds: 77
>> M9: 76
>> G12: 76
>> LX5: 75
>> --
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>>
>
>
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