> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of
> frank1o05
> Sent: Saturday, April 23, 2005 10:05 AM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Re: What do forum folks use most for image capture?
>
>
>
> Paul,
>
> How does lens quality enter into the picture? I sometimes shoot (recent)
> Leica-M lenses.
> They are quite soft towards the corners when compared to MF (Rollei) or LF
> lenses at the
> same (and even at different) magnification ratios. (All shot at optimum
> apertures: f/5.6, f/
> 11, f/22 respectively. The MF comparison holds only for my normal and
> longish lenses; my
> 50mm Rollei is quite bad off center.) The Leica primes also show some
> barrel distortion,
> much less than other 35mm lenses (which is why I chose them), but still
> more than I have
> use for in architectural work. So I find that if I want straight lines
> straight and sharpness in
> the corners, I have to use MF or LF, regardless of whether there is a chip
> or film in the
> camera.
>
> Frank
>
>
>
>
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
> <paul.roark@v...>
> wrote:
> > Ernst,
> >
> > You wrote, in part:
> >
> > >...
> > > what's possible with his 20D. I could still beat it with the Iskra 6x6
> ...
> >
> > Yes, especially if fine detail and resolution are most significant.
> >
> > But, the question for me may be: How much of the typical 16 x 20 inch
> fine
> > art image is affected by the resolution beyond what this 8 mp camera can
> > capture?
> >
> > I made a set of comparison prints using the Rebel and various medium
> format
> > camera and films. My sampling of an admittedly limited group of
> typical,
> > educated (but not photo-obsessed) types suggests they don't see much of
> the
> > fine detail advantage that the film technically holds.
> >
> > The limiting factor or artifact that everyone seemed to see the most in
> my
> > sample prints was the grain of the 100 ISO film.
> >
> > "Sharpness" -- from even a close, "book-reading" distance -- is about a
> draw
> > between my unprocessed, Nikon 8000 scanned, medium format film prints
> and 8
> > mp versions. I can see the difference, but it's probably not going to
> be
> > visible in 16 x 20" real world prints.
> >
> > What I have found with my old Tmax 100 medium format negatives is the
> extent
> > to which the grain limited me. If one looks at the photograph as an
> > information medium and what we do as information processing, I want the
> > maximum useable information to be accessible to the viewer as easily as
> > possible. For this, I want the best signal-to-noise ratio over the
> > "relevant" frequencies. The relevance of the frequencies is probably a
> bell
> > curve that changes with viewing distance and image size -- and it's
> probably
> > heavily skewed to the lower frequencies in prints that are judged in
> part on
> > their "artistic" merit. The peak of that bell curve and, perhaps, 95%
> of
> > the area under that curve seem to be well within what the 8 mp Rebel can
> do
> > very easily, even at a 16 x 20 size.
> >
> > I'm currently of the opinion that this relatively cheap little Canon
> Digital
> > Rebel XT (aka 350D), even with its 18 - 55 mm II zoom, has just knocked
> off
> > most of my medium format film-camera combos for most situations.
> >
> > The low noise of the Canon sensor is a huge part of the formula. (I'm
> not
> > sure how good the other sensors are. I suspect this may be where Canon
> > kills Kodak. I think Kodak poured money into CCD technology, which was
> once
> > thought to be the low-noise leader, but which suffered other
> disadvantages.
> > Among other things, CCD technology has, apparently, not as directly
> > benefited from the CMOS microprocessor and memory R&D and advances.)
> >
> > Combining the Canon's inherently low noise I've seen so far with the
> ease
> > with which I can multi-sample on a tripod, and the limiting factor of
> the
> > grain in 100 ISO film virtually kills the currently existing film market
> for
> > me. My freezer full of TP may be the end of film for me.
> >
> > Of course, the real world use of this camera may change my opinions.
> >
> >
> > Paul
> > www.PaulRoark.com
> >
> >
> >
> >
> > __________________________________
> >
> > > Paul Roark wrote:
> > >
> > > >
> > > >I think MF Tech Pan is still my ultimate in quality, but there is no
> > > reason
> > > >to bother with MF Tmax 100, which is now the finest grain camera film
> > > Kodak
> > > >makes since it discontinued Tech Pan. So, I'm saving the stockpile
> of TP
> > > >for when I really want to go to 22 x 28 or above, and the Rebel is
> going
> > > to
> > > >replace my "quick and easy" Fuji GA 645 Zi that used to have higher-
> speed
> > > >film in it for the occasional hand held shot.
> > > >
> > > >Paul
> > > >www.PaulRoark.com
> > > >
> > > >
> > > >
> > >
> > > Printed some color prints of a Canon 20D on the Epson 10000 (MIS 7600
> > > inks) with Qimage extrapolation and sharpening. I wasn't surprised by
> > > the quality but my customer was very surprised, his 2100 and Photoshop
> > > (on a Mac) couldn't use all the information available, now he knows
> > > what's possible with his 20D. I could still beat it with the Iskra 6x6
> > > and wet mount scans on the Nikon 8000 but it takes a lot more work.
> > >
> > > Ernst
> > >
>
>
>
>
>
>
> Please visit the Group Homepage to check the Files, and other resources as
> they are often being updated.
>
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
>
> If you wish to receive no emails or just a daily digest, or you wish to
> unsubscribe, please edit your Membership preferences by visiting this same
> page.
>
> Please follow these basic guidelines:
> - As threads develop, trim off excess portions of earlier messages to keep
> them short.
> - Good manners are required at all time. No personal attacks or flames.
> Hostile, aggressive or argumentative users may be removed from the
> membership without notice.
> - Keep your posts and threads related to the group topic of digital B&W
> printing. Users who persistently make off-topic posts may be removed from
> the membership.
> - By posting on this forum you agree to abide by the group rules and
> guidelines, and to abide by the actions and decisions of the group Owner
> and Moderators. See "Group Topic, Rules and Guidelines" in the Files
> section:
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/
>
> BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT
> YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE "OWNER" AND
> "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO
> YOU FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR
> EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF
> PROFITS, GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE
> "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN
> ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE
> OR THE INABILITY TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii)
> UNAUTHORIZED ACCESS TO OR ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii)
> STATEMENTS OR CONDUCT OF ANY THIRD PARTY ON THE DIGITAL BW, THE PRINT
> YAHOO GROUP; OR (iv) ANY OTHER MATTER RELATING TO THE DIGITAL BW, THE
> PRINT YAHOO GROUP.
>
> Yahoo! Groups Links
>
>
>
>
>
>