[LRflex] Re: Z + N = ? OT (maybe)
- From: Richard Ward <ilovaussiesheps@xxxxxxxxxxx>
- To: "leicareflex@xxxxxxxxxxxxx" <leicareflex@xxxxxxxxxxxxx>
- Date: Tue, 7 Jun 2011 00:55:43 -0400
Another area where manufacturing costs have been 'controlled' but for the
> more demanding users another source of frustration and post-production
> calibration.
>
> Doug Herr
If I understand the 'entirety' of Roger's Essays well, the confluence of
utterly flat sensors, tiny pixel sizes, and the tiny little lenses over each
one, make it a) quite easy to discover lens alignment issues if and when they
exist and b) exceedingly small alignment errors are perceptible. At least in
regard to dSLRs with 16mp crop sensors and 20mp class FF sensors, it seems to
be true anyway.
Further, his essays address the issue of manufacturing the cameras and lenses
without the variances in alignments which are proving to be problematic with
high resolution sensors. The challenge isn't achieving the neccessary
tolerances, but achieving them without quite signifigant increases in per
camera costs. The variances perceivable with these sensors is so minute it is
my understanding that once that tolerance is divided across the production of
the camera chassis, the body's lens mount, the lenses' mount, and assembling
the camera and lenses within those alignments it becomes quite the engineering
challenge to do so absent extraordinary manufacturing costs being incurred.
Really really expensive costs.
If I recall correctly, he does posit a theory that the "solution" to the
situation might lay in coming at the problem from a different direction than
making utterly perfect and utterly identical cameras and lenses. The first
being a) a Software Direction where the lenses are laser analyzed at the
factory and each one's imperfections are recorded in it's rom chip for the
camera to use to filter the errors out during the processing of each image as
it's shot. Or b) a Hardware Direction where the Sensor's Alignment with the
Lens Mount is achieved with electronically adjustable means rather than
physical shims which would allow each user to custom adjust their cameras
themselves. Further even customizing the alignment to adjust when individual
lens are mounted.
Sincerely
R. In Mi.
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