I see it finally got to you too. Mike needs to distribute an acronym
list with his emails. I usually don't understand half of it. I think
"X-trans design" relates to the fuji sensor's non-Bayer color layout and
"B to B" and "R to R" the increased distances to blue and red sub-pixels
due to more green sub-pixels... but that's an assumption by context
only. I have no idea what "X-trans" means except that it's probably
related to Fuji X cameras... whatever that is. Without specific models
being mentioned so I can go check on DPReview I have no way to relate to
the subject. (and I think I may have just invented the term "sub-pixel"
to refer to the RGB components of a pixel because I don't know the
correct term if there is one) :-)
Chuck Norcutt
On 2/14/2014 3:04 AM, Nathan Wajsman wrote:
> CFA - chartered financial analyst?
> B to B - business to business?
> R to R - ???
> POCS - sounds like some sexually transmitted disease
>
> Just trying to understand the abbreviations before diving into the technical
> bits ;-)
>
> Cheers,
> Nathan
>
> Nathan Wajsman
> Alicante, Spain
> http://www.frozenlight.eu
> http://www.greatpix.eu
> PICTURE OF THE WEEK: http://www.fotocycle.dk/paws
> Blog: http://nathansmusings.wordpress.com/
>
> YNWA
>
> On Feb 14, 2014, at 12:53 AM, usher99@xxxxxxx wrote:
>
>> The fuji cams just handle well with the SS dials and aperture
>> rings--feel like real cams and
>> not computers with lenses attached. The lenses seem to have very nice
>> rendering as well or is it the lens/cam combo---dunno. Still FF A7(r)
>> is not that much bigger and perform better in many circumstances and
>> MFT can be quite small and horse cam friendly with large stable of
>> lenschoices.
>> X-trans design still bothers a bit.
>>
>> CFA's have trade offs by nature. Xtrans designed so the "green" raw
>> channel has more coverage but less positional symmetry than in a Bayer
>> sensor
>> and as a direct result there is less high-frequency luminance
>> "miscalculations" in the interpolation, giving lower noise in raw
>> conversion.
>> The larger B to B and R to R distances necessitate a large chroma
>> smoothing radius resulting in "watercolor effects or artifacts--balance
>> seems different with different converters. Accuraw allows one to adjust
>> the balance though have never used it.
>>
>> http://www.dslrbodies.com/accessories/software-for-nikon-dslrs/software-news/accuraw-11-update.html
>>
>> I was hoping that DXO with all their optics Ph.D's would use POCS
>> algorithm to minimize the complicatons of the uneven channel coverage
>> but they haven't bitten on that yet and don't support Fuji in DXO
>> optics pro. I think they could have the very best converter if they
>> wanted to develop it.
>>
>> Still would very much enjoy using fuji gear I think and the above
>> concerns are not that dramatic. Certainly have admired the images here.
>>
>> Mike
>
>
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