[Leica] LR 2.6 and M8

[hopsternew at gmail.com (Geoff Hopkinson)]

Yep all that I said and the analysis was from Sandy who wrote Cornerfix as
you say. Sandy REALLY knows this stuff.
The DNG specification has been updated. However it is not compulsory that
every part of the standard is implemented.
The actual metadata from Leica has not changed, nor has Leica yet taken
advantage of some of the new possibilities (nor any other DNG implementer).
Specifically the ability to edit firmware corrections like lens specific
vignetting or aberration correction in post. Actually Hasselblad decided it
was too hard and dropped their support, while removing support for DNG from
users' convertors without telling them too.
 Cheers
Geoff
http://www.pbase.com/hoppyman


On 28 March 2010 19:31, Steve Unsworth <lug at steveunsworth.co.uk> wrote:

> I think the "guestimated" f stop is also used when applying correction to
> the image when a UV/IR filter is used.
>
> The value has indeed always been there, it's just that Adobe weren't
> displaying it in previous versions. Leica didn't add it to the standard
> metadata because it wasn't an accurate value - from memory it's up to +- 1
> stop different from the actual aperture.
>
> According to the person who wrote Cornerfix the calculation Adobe use to
> translate the value held in the Exif field to the f stop is wrong, though
> that may have been corrected by now.
>
> Steve
>
>
> On 28/3/10 08:06, "Geoff Hopkinson" <hopsternew at gmail.com> wrote:
>
> > It is reading a value (for EV I think) in the Metadata and incorrectly
> > reporting it as aperture. In my experience can be close, (~.5 to 1 stop)
> > Remember that the M8/9 has a brightness sensor which can be used for
> > comparison against the metered value for some functions (including flash
> and
> > some corrections in firmware). Reportedly also used to adjust the finder
> > display brightness. I think that the value was always present in the
> > metadata but not read/reported previously.
> >
> > Cheers
> > Geoff
> > http://www.pbase.com/hoppyman
> >
> >
> > On 28 March 2010 15:27, Nathan Wajsman <photo at frozenlight.eu> wrote:
> >
> >> Yes, I noticed it too. It is not very accurate, at least not at the
> wider
> >> apertures I tend to use.
> >>
> >> Cheers,
> >> Nathan
> >>
> >> Nathan Wajsman
> >> Alicante, Spain
> >> http://www.frozenlight.eu
> >> http://www.greatpix.eu
> >> http://www.nathanfoto.com
> >>
> >> Books: http://www.blurb.com/bookstore/search?search=wajsman&x=0&y=0
> >> PICTURE OF THE WEEK: http://www.fotocycle.dk/paws
> >> Blog: http://www.fotocycle.dk/blog
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Mar 28, 2010, at 6:43 AM, Frank Filippone wrote:
> >>
> >>> Apparently, LR V2.6 has the ability to display the "recorded" F stop of
> >> the
> >>> taken image from M8 DNR Files.
> >>>
> >>> Located in the Histogram and the Metadata sections of LR.
> >>>
> >>> Nice.......  Now to see how accurate the data is, or is not.......  But
> >> even
> >>> if not perfectly accurate, it gives an approximation......
>
>
>