[LRflex] Re: Digital APO correction in our futures?

Bill -

I know whatcha mean about the "paradigm shift" of fixing something  
that the "moving hand" already miswrote...

Here's an intro to the DXO thing:

http://www.dpreview.com/reviews/dxoopticspro/

Bob Palmieri


On Sep 29, 2006, at 2:20 PM, William Abbott wrote:

> Bob, Andrew-
>
> Thank you both for your kind replies to my remarks about the
> Hasselblad Digital APO Correction (DAC) .
>
> As Andrew pointed out, I am indeed behind the times in this area, and
> need to do some digging, on which I will gladly embark. I always seem
> to have a lot to learn; it is a fact of my  life.
>
> I tend to divide photography into what happens before the shutter
> clicks and what happens afterwards, and those now come in two
> flavors, analog and digital.
>
> What intrigues me is the progression of digital technology from post-
> click, off-camera processing (digital manipulation of raw files,
> Photoshop, etc.) upstream into the camera itself, to account for lens
> vignetting, for example, and now lens CA, in real time, as the data
> stream moves from the sensor to the digital file.
>
> The ability to alter, in that moment, what has heretofore been
> unalterable, seems to me to be a technological marvel of great
> promise, especially if it can become adaptive, i.e., the specific
> alteration is dependent on the environment in which the image is
> being recorded, becoming similar to adaptive aircraft flight
> controls, which alter their behavior according to the flight regime
> in which the aircraft is operating.
>
> So thank you both very much for helping me understand this subject
> more clearly. Bob, I'm not familiar with "DX/O" and will appreciate a
> lead to where I can learn more.
>
> With all best wishes,
>
> Bill
>
>
>
>
>
> On Sep 28, 2006, at 9:08 AM, bob palmieri wrote:
>
>> Bill -
>>
>> I'm currently trying out the DX/O version of this sort of thing.
>> They have profiles for a number of lenses; in the case of lateral
>> chromatic aberration I think they just re-map the pixels to change
>> the apparent magnification of individual channels.
>>
>> Bob Palmieri
>>
>>
>>
>>
>> On Sep 27, 2006, at 3:41 PM, William Abbott wrote:
>>
>>> Hi all,
>>>
>>> Here is something that caught my eye.
>>>
>>> Digital correction in software of optical design problems seems  
>>> to be
>>> coming to the market place, something new to me, though it has been
>>> theoretically possible for some time.
>>>
>>> Here is an exerpt from a short article in Digit, which says about
>>> itself, "Digit is the UK's leading resource for creative
>>> professionals, both in print and online." The article is entitled:
>>> Leica, Hasselblad Show New Digital Cameras, Wednesday 27 Sep 2006 -
>>> 09:20, and can be read at:
>>>
>>> http://www.digitmag.co.uk/news/index.cfm?NewsID=6201
>>> After discussing the new Leica cameras, the article goes on to say,
>>> "Hasselblad launched what the company claims to be the world's first
>>> 48 millimetre full-frame DSLR camera." Here is the later  
>>> paragraph of
>>> interest:
>>>
>>> "The camera is built around a new digital camera engine. Information
>>> about lens and exact capture conditions are fed into the engine for
>>> ultra fine tuning of the auto-focus mechanism, taking into account
>>> the design of the lens and optical specification of the sensor.
>>> Another feature is Digital APO Correction (DAC)."
>>>
>>> What this "feature" means for new and old lenses is left unclear.
>>>
>>> Can new lenses now be constructed more simply by using this mode of
>>> optical "correction"?
>>>
>>> Can older lenses have their performance "improved" by a one-shot
>>> measurement of their inadequacies and the prescription of a digital
>>> correction?
>>>
>>> As ever,
>>>
>>> Bill
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