Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Shunith Dutt


- Original Message -
From: Neil Cotty [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 24, 2001 3:37 AM
Subject: RE: filmscanners: Nikon film flatness (was Glass slide mounts)


 and you thought this thread had died.. G

 Well, someone asked if the AN coatings of Glass Slides would show in a
scan
 and I can say that with Quickpoint slides of the type I have at least, it
 most certainly DOES. You get a sort of grassy looking star pattern that is
 terrible especially in skys or continuous tone areas. Huge yuk!

Yup... that was me... at least, i did ask and no one replied... till now :)

Well, asked about the Nikon 4000ED in this very forum... was told it was
great... no one mentioned the focus/sharpness problem... and now i'm
stuck what makes matters worse is that i run a W2K, dual processor
system and Nikon Scan keeps crashing configuring it run on a single PC
is of no use. There was a very helpful suggestion from an individual
(complete with all the necessary instructions) to boot as a single processor
system whenever i want to run Nikon Scan. I'm getting more and more tempted
to take him up on his suggestion. Its just a shame tho' that one expects so
much from a company like Nikon and even the software doesn't work

Shunith


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.282 / Virus Database: 150 - Release Date: 25/09/2001




Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Svante Kleist


Supposedly, Nikon Scan 3.1.1 is round the corner.

I can't imagine that Nikon would risk their reputation
by _not_ solving the MP / Win2000 crashes.
(Are you reading this Nikon? How could you release
such a pile of crap as 3.1 ?)

/ Svante Kleist, Stockholm


--On Wednesday, October 24, 2001 11:14  +0530 Shunith Dutt 
[EMAIL PROTECTED] wrote:


 - Original Message -
 From: Neil Cotty [EMAIL PROTECTED]
 To: [EMAIL PROTECTED]
 Sent: Wednesday, October 24, 2001 3:37 AM
 Subject: RE: filmscanners: Nikon film flatness (was Glass slide mounts)


 and you thought this thread had died.. G

 Well, someone asked if the AN coatings of Glass Slides would show in a
 scan
 and I can say that with Quickpoint slides of the type I have at least, it
 most certainly DOES. You get a sort of grassy looking star pattern that
 is terrible especially in skys or continuous tone areas. Huge yuk!

 Yup... that was me... at least, i did ask and no one replied... till now
 :)

 Well, asked about the Nikon 4000ED in this very forum... was told it was
 great... no one mentioned the focus/sharpness problem... and now i'm
 stuck what makes matters worse is that i run a W2K, dual processor
 system and Nikon Scan keeps crashing configuring it run on a single PC
 is of no use. There was a very helpful suggestion from an individual
 (complete with all the necessary instructions) to boot as a single
 processor system whenever i want to run Nikon Scan. I'm getting more and
 more tempted to take him up on his suggestion. Its just a shame tho' that
 one expects so much from a company like Nikon and even the software
 doesn't work

 Shunith


 ---
 Outgoing mail is certified Virus Free.
 Checked by AVG anti-virus system (http://www.grisoft.com).
 Version: 6.0.282 / Virus Database: 150 - Release Date: 25/09/2001






Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Rob Geraghty

Svante Kleist [EMAIL PROTECTED] wrote:
 I can't imagine that Nikon would risk their reputation
 by _not_ solving the MP / Win2000 crashes.

They risked their reputation by not fixing the jaggies problem with
Nikonscan 2.x for how long? :)

Rob





Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Shunith Dutt


- Original Message -
From: Svante Kleist [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 24, 2001 12:41 PM
Subject: Re: filmscanners: Nikon film flatness (was Glass slide mounts)



 Supposedly, Nikon Scan 3.1.1 is round the corner.

 I can't imagine that Nikon would risk their reputation
 by _not_ solving the MP / Win2000 crashes.
 (Are you reading this Nikon? How could you release
 such a pile of crap as 3.1 ?)

Doubt it... there were a couple of links i've stumbled across in searches
and definitely Nikon has no plans to solve this problem...

http://www.mail-archive.com/filmscanners@halftone.co.uk/msg14230.html

To quote from the above link... which, incidentally, is this very one! :

It is known by Nikon that there are problems with Dual Processor PC's,
both
Windows and Mac.  Although the Product Brochures do not specifically say
the 2CPU machines will not work, neither do they say it does.  Dual
Processors are good but only for applications that are designed for them
like Photoshop.  Ours is not and probably will not be for the foreseeable
future

The effing nerve






---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.282 / Virus Database: 150 - Release Date: 25/09/2001




Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Pat Perez

Nikon is wrong. This is simply not the case with Windows NT/2K/XP, which all
evolved from the same core. Software can benefit from being optimized for
multiprocessors, but optimization is not necessary unless the software
vendor is using non standard calls into the OS. The hardware abstraction
layer will make the number of processors transparent to any application. The
extent to which optimization is needed, and the nature of the optimization
is in the area of threading. The more threads an application has, the
greater the performance increase additional processors will be observed. It
sounds like Nikon is not observing published API calls, probably in the area
of memory management, which is a  shame, because NT really does handle these
things quite well, especially in latest versions (e.g. NT4 SP6, Win2K and
presumably XP). The Mac OS (at least prior to version X, and maybe that,
too) *do* specifically need custom versions of an application in order to
take advantage of multiple processors.

If Nikon want to take a weasely way out by saying that it isn't specifically
stated as supporting any given hardware, then they are, in my opinion,
obligated to list the specific hardware it is *only* certified to work on,
or else offer extremely wide latitude for returns due to unsupported, but
not documented as such, hardware incompatibilities.


Pat

- Original Message -
From: Shunith Dutt [EMAIL PROTECTED]




 - Original Message -
 From: Svante Kleist [EMAIL PROTECTED]



 
  Supposedly, Nikon Scan 3.1.1 is round the corner.
 
  I can't imagine that Nikon would risk their reputation
  by _not_ solving the MP / Win2000 crashes.
  (Are you reading this Nikon? How could you release
  such a pile of crap as 3.1 ?)

 Doubt it... there were a couple of links i've stumbled across in searches
 and definitely Nikon has no plans to solve this problem...

 http://www.mail-archive.com/filmscanners@halftone.co.uk/msg14230.html

 To quote from the above link... which, incidentally, is this very one! :

 It is known by Nikon that there are problems with Dual Processor PC's,
 both
 Windows and Mac.  Although the Product Brochures do not specifically say
 the 2CPU machines will not work, neither do they say it does.  Dual
 Processors are good but only for applications that are designed for them
 like Photoshop.  Ours is not and probably will not be for the foreseeable
 future

 The effing nerve








_
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-24 Thread Neil Cotty

is in the area of threading. The more threads an application has, the

Absolutely, and the thread(s - yeah right) monopolise the CPU. Have you ever
noticed how with a fast PC you can surf the net, check email, work on an
image in PS AND scan a 128mb file in Vuescan, play a CD and the CPU is doing
virtually zilch, then with NS3.1 a lot of the time the CPU is pegged at
95-100% - by itself! Exhibiting typical highest priority, single thread
behaviour if you ask me. They need to hire a few decent developers IMO! NS
is way too resource hungry, it acts like it owns the system and that is part
of the problem with all these crashes IMO.

Whats funny compared to others on W2K, I personally haven't had many crashes
with NS3.1 (like 2?!) and I like it's interface and think it's better than
Vuescan in a number of ways - namely pre scan curve adjustments, gain,
manual focus points etc - but I use NS now only for chrome. Vuescan somehow
seems to smack NS when it comes to BW negs - oh and it has _never crashed
on me, even on an 'ancient' Celeron 400.

N




Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-23 Thread Arthur Entlich

You could have, if you wanted to...

Art

PS: At least I can have final words... and then drop it.

Austin Franklin wrote:

Since you felt the need to get in your final word (actually several 
hundred... but who is counting ;-)  I'll do the same...

 
 My, how entirely uncharacteristic of you, Arthur!
 
 Sorry, I couldn't resist ;-)
 
 .
 
 






RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-23 Thread Neil Cotty

and you thought this thread had died.. G

Well, someone asked if the AN coatings of Glass Slides would show in a scan
and I can say that with Quickpoint slides of the type I have at least, it
most certainly DOES. You get a sort of grassy looking star pattern that is
terrible especially in skys or continuous tone areas. Huge yuk!

Basically I've decided I either use Glass slides and mount them reversed
away from the AN coatings, or if I get Newton rings then stuff them in the
FH-3 or in a std Slide mount (urgh).

I am really wondering whether or not I should have got a Polaroid.
Especially since I've found how easy it is to correct dust problems etc in
PS6 not being a digital type before. This sharpness issue is a real pain
IMO. Some scans I just can't get sharp, even with some of my best chromes
(tack sharp under a loupe and shot on Leica glass, tripod mounted yadda
yadda) and PS sharpening using various methods, actions etc just introduce
too much noise when I want to blow them up to say Super A3. Have to live
with it now I guess... Hmph.

I've basically settled on the above mounting procedures with manual focus
point selection in NS3.1, 14bit scanning, 16x sampling, ICE/GEM etc off,
Color management off and color editing the file in 16bit mode in PS. Scanner
pumps out 130mb files - ok on a grunt box PC like mine but a MPITA for a lot
of others out there I bet having lived with a 433 Celeron laptop for ages. I
do sharpening in 8bit, LAB mode using various PS actions. Any other
suggestions for improving sharpness gratefully received! :)

I really would love to see a crop from Polaroid scan of the same chrome side
by side with one from a LS4000. Would be interesting..

'ave a good one,
Neil




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-23 Thread Mike Duncan


I really would love to see a crop from Polaroid scan of the same chrome side
by side with one from a LS4000. Would be interesting..

'ave a good one,
Neil

Try http://www.imaging-resource.com/.

Mike Duncan





Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-22 Thread Arthur Entlich

Since you felt the need to get in your final word (actually several 
hundred... but who is counting ;-)  I'll do the same...

I would agree with most of what you said IF,

1) Nikon made this matter clear in their advertising, or at least 
somewhere that the consumer could read it

2) Knowing this fact, they provided a glass carrier included with the 
scanner, since they must realize that people spending the amount they 
ask for a higher end consumer scanner are looking for edge to edge sharpness

3) other 4000 dpi scanners were unable to do any better in this department.

Clearly (excuse the pun) this is NOT the case in any of the above.

Personally, I don't care if the problem with these scanners is due to 
low lux light sources, bad lenses, optical design or because Nikon is 
from the planet Mars.  The point is, the problem not only exists and is 
left basically unacknowledged, but a good many people apparently don't 
much like it, and it would appear the same good many people do not want 
to ravage their mounted slides to place them into glass carriers, and 
deal with that whole range of problems.

I guess the real question for many is, does whatever advantage the Nikon 
film scanners provide (if any) over the competition (SS4000, SS4000+, 
Canon FS4000, etc) justify all the problems this shallow DOF creates in 
  the work flow?

That is up to each individual, but I think they ALL deserved the right 
to have known what to expect BEFORE they made their purchase.  If Nikon 
was more forthright about this matter, I'd have little more, if 
anything, to say about it.

Art

PAUL GRAHAM wrote:

 Hi all,
 
 My opinion on film flatness has been explained before, so this will be my
 final word on the topic.
 I've worked in very high end darkrooms for 20 years, typically making 4 foot
 to 6 foot prints (110 to 180cm) every day, from 35mm and medium format negs.
 That is an enlargement factor of 5000%.
 I have the brightest enlarger heads for these formats - 1000W of halogen
 lamps, BUT.. I still have problems with film flatness. Brighter light
 sources make no difference - you simply have to use a glass film holder for
 this type of high quality work to get edge to edge film flatness.. there is
 no other way, and there has been no real alternative in 100 years of
 darkroom technique/ equipment.
 Now a regular home enthusiast with a small enlarger won't use a glass holder
 because they don't look so closely at detail corner sharpness plus typically
 they stop down too much (enlarger lenses are at their optimum 2 stops down,
 any more degrades the resolution) to get the depth of field/ corner
 sharpness, which masks any uneveness of film. Or perhaps their lenses are
 not as wide in aperture to begin with.
 My point is that the higher your demands get, the more you notice things
 like film flatness becoming critical.
 Cheap scanners, or low resolution scanners, like cheap enlargers, dont show
 the best from the film, but neither do they show the faults in the
 technique, such as absolutely flat film. it's a good compromise - a stopped
 down aperture masks a lot of alignment issues  that look good up to a point
 but ask for resolution beyond that point, and the problems begin.
 I think this is what we are coming across with the new high end prosumer
 scanners.
 If you want the ultimate - a 4000 dpi scan, with edge to edge sharpness,
 then you may have to accept that you need to use glass holders or take other
 measures to ensure flat film.
 My point has always been that it is wrong to expect ultimate resolution
 corner to corner by just dropping a strip of film in a holder and pressing
 'scan'. Nobody in the pro-scanning world of drum scanners does that or gets
 that. Nobody in professional darkroom work does that or gets that. So lets
 get realistic here...
 Maybe, just maybe, Nikons approach has been to use a light source that
 requires a wider lens aperture, gaining very high resolution (they come top
 in most critical resolution tests) and long term colour stability. Polaroid
 have taken a different path, used a different (brighter) light source, a
 smaller aperture and gained depth of field, trading off against ultimate
 resolution.
 Nikon make and sell glass holders for their scanners, so...
 You pay your money and you makes your choice...
 
 paul
  





RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-22 Thread Shough, Dean

For someone with time, Photoshop savvy, and an important slide that suffers
from the focus problem, I would like to recommend A Multifocus Method for
Controlling Depth of Field at 

http://www.sgi.com/grafica/depth/index.html

The author, Paul Haeberli, takes two images of the same scene and performs
some manipulations to create a single image that retains the sharpest
portions of each individual image. When applied to scanners, the two images
would be scans with the focus set to different places on the slide.  It
should not be hard to create  Photoshop action that will combine the
sharpest portion of two scans using this technique.



RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-22 Thread Austin Franklin


 Since you felt the need to get in your final word (actually several 
 hundred... but who is counting ;-)  I'll do the same...

My, how entirely uncharacteristic of you, Arthur!

Sorry, I couldn't resist ;-)




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-21 Thread Julian Robinson

Do Nikon make glass holders for the LS2000?  I have never had this 
suggested to me by Nikon, but this may be because in Australia we are 
several light years away from the manufacturer and thus accurate information.

Julian

At 10:23 21/10/01, you wrote:
Nikon make and sell glass holders for their scanners, so...
You pay your money and you makes your choice...




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-21 Thread Paul Graham

Bill,

My only conclusion is that something must be up with the 4000 (which I don't
have) compared to the 8000 (which I do).
By rights, the medium format 8000 should by far have the bigger problem with
film flatness, but I can assure you that it's fine - no more nor less than
one would expect.
I use glassless carriers for most work, and glass ones for any dimensionally
challenged (!) film.
But I have nothing like the problems you describe, and no idea why. A
smaller format should be far easier to control than a larger one. so
assuming we have similar expectations, your problems seem greater than mine,
with no logical explanation.
As for glass mounting, I was mainly talking about unmounted strips of film
(easy to put in a glass carrrier) rather than individual slides, so I
appreciate your reluctance.

My only caveat is that there are very well known problems with bowing of
cardboard slide mounts, which you do specifically mention yours being, so...
how much flatness should you expect from an ageing (warping) piece of card
and glue? and how much should you expect a scanner to deal with that issue?
I would ship some of them over to plastic mounts and see what changes that
makes. Of course if your film has been sitting for years in a bowed card
mount, then it would have to be a glass slide to force it back into shape.
Do you find exactly the same problem with plastic mounted kodachromes?

The other thought: all the posts complaining about this issue have been from
4000 owners too. none from 8000 people. hmmm.

hope you find a workable answer to your frustrations,

bests,
paul


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Bill Fernandez
Sent: 20 October 2001 15:28
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: RE: filmscanners: Nikon film flatness (was Glass slide mounts)


Paul--

Your post was very sane and reasonable and after reading it I was
feeling that maybe life isn't so bad after all... until I turned back
to my shiny new, $1,600 Nikon LS-4000ED and returned to wrestling
with focus problems.  Your final word is a good one so you don't have
to respond, but I'd at least like to share my thoughts with the list.

Three years ago I bought a 2,400 dpi Minolta Scan Dual for $500 which
was the best I could afford at the time.  It scans one of my favorite
Kodachrome 64 slides with even sharpness across the entire field,
even into the corners, albeit only at 2,400 dpi.  Now, three years
later, I spend three times as much for a top of the line scanner with
two or three generations of improvement.  I find that on this
favorite slide I can get it sharp in the center and fuzzy in the
corners or vice versa.  Or, if I set the focus point (numerically)
halfway in between then I get maximum sharpness in a ring-shaped
region, while the center and corners are BOTH out of focus.

Now there's nothing wrong with this in principle, and I wouldn't mind
if it was only a little bit out of focus, it's just that (with the
focus at the halfway point) the center and corners are no sharper
than my three year old scanner is across it's entire field.  So it's
very disappointing to wait three years and spend three times as much
to get no better sharpness across the field than what I've already
got (other things are LOTS better, but here I'm concentrating on the
focus problem).  Now even this wouldn't be so bad if all the other
scanners had the same problem.  But I've never heard about this as an
issue with the Polariod SprintScan 4000, or the Canon FS4000, or
higher end scanners such as the Imacon flextites (although there was
a recent post by a person who's had this issue with his Artixscan
4000).

So here I am with thousands of cardboard mounted Kodachromes, of
which perhaps a hundred are worth some serious attention, and I have
to think:  If I focus near the center and let the edges and corners
go so fuzzy that (depending on the slide) they're no better than a
1,000 to 2,400 dpi scanner, is that good enough for images I really
care about?  Will the fuzziness show on the largest prints I'm likely
to make?  Am I willing to put up with the incredible hassle of glass
mounting a hundred (or hundreds?) of slides?  And when I get to my
negative strips, will I have to slice the good ones out of the
middles and glass mount them too?  Would I have avoided this problem
entirely had I bought a Polaroid or Canon?

I wouldn't mind if the sharpness only varied a little bit across the
field.  But losing half the resolution of the scanner is highly
unsatisfactory, both intellectually and visually.

--Bill




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-21 Thread Bill Fernandez

Hi Paul--

In fact the favorite slide I mentioned has been in a Spiratone 
SnapIt plastic mount for the past 10 years at least. It IS visibly 
curved, but not by cardboard.

It is interesting that, as you say, I've never heard this complaint 
from LS-8000 owners.

--Thanks, Bill


At 2:05 PM -0700 21-10-01, Paul Graham wrote:

I would ship some of them over to plastic mounts and see what changes that
makes. Of course if your film has been sitting for years in a bowed card
mount, then it would have to be a glass slide to force it back into shape.
Do you find exactly the same problem with plastic mounted kodachromes?

The other thought: all the posts complaining about this issue have been from
4000 owners too. none from 8000 people. hmmm.
-- 

==
Bill Fernandez  *  User Interface Architect  *  Bill Fernandez Design

(505) 346-3080  *  [EMAIL PROTECTED]  *  http://billfernandez.com
==



Re: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-20 Thread Mikael Risedal

I was the first person to write about the focus problem with curved film and 
the LS4000 scanner in mars 2001. Some people in the scanner group almost 
hang me because of my criticism about the LS2000 and LS 4000 scanners . I 
have still the  same problem when I use my  two Nikon  scanners but no 
problem with my old Polaroid 35+ regarding ower all sharpness of a picture.
Take a look at
http://members.austarmetro.com.au/~julian/ls2000-focus.htm
Nice conclusion
Best regards
Mikael Risedal
Happy Nikon D1X owner (no problem with curved film , grain and dirty colors)



From: Peter Marquis-Kyle [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: filmscanners: Nikon film flatness (was Glass slide mounts)
Date: Sat, 20 Oct 2001 13:19:03 +1000

Neil Cotty reported that, with his Nikon LS4000 scanner, the SA-21 Strip 
Film
Feeder does a better job of holding the film flat than the FH-3 Strip Film
Holder. His results (listed from worst to best) were

  Std. Mounted Slides
  FH-3 Strip Film Holder in Slide Carrier
  SA-21 Strip Film Feeder
  Glass Slide Mounts

I suspect different specimens of Nikon scanners, and their film holding 
gadgets,
vary in their accuracy. Getting the film flat and parallel with the plane 
of
focus is critical in Nikon scanners because of the shallow depth of field. 
If
you are lucky, some of the misalignments in the different components will 
cancel
out.

For someone used to the solidity and accuracy of a Leitz enlarger, its a 
wonder
these bits of Nikon plastic work as well as they do...

With my LS-30, I found the Holder held the film flat enough for a 
grain-sharp
scan of the whole frame, while the Feeder did not. I used the test method
developed by Julian Robinson (
http://members.austarmetro.com.au/~julian/ls2000-focus.htm ) which I 
commend to
anyone with a Nikon film scanner.

An hour of testing was enough to show me what works well (and what doesn't) 
with
my scanner.

Peter Marquis-Kyle



_
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp




RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-20 Thread PAUL GRAHAM

Hi all,

My opinion on film flatness has been explained before, so this will be my
final word on the topic.
I've worked in very high end darkrooms for 20 years, typically making 4 foot
to 6 foot prints (110 to 180cm) every day, from 35mm and medium format negs.
That is an enlargement factor of 5000%.
I have the brightest enlarger heads for these formats - 1000W of halogen
lamps, BUT.. I still have problems with film flatness. Brighter light
sources make no difference - you simply have to use a glass film holder for
this type of high quality work to get edge to edge film flatness.. there is
no other way, and there has been no real alternative in 100 years of
darkroom technique/ equipment.
Now a regular home enthusiast with a small enlarger won't use a glass holder
because they don't look so closely at detail corner sharpness plus typically
they stop down too much (enlarger lenses are at their optimum 2 stops down,
any more degrades the resolution) to get the depth of field/ corner
sharpness, which masks any uneveness of film. Or perhaps their lenses are
not as wide in aperture to begin with.
My point is that the higher your demands get, the more you notice things
like film flatness becoming critical.
Cheap scanners, or low resolution scanners, like cheap enlargers, dont show
the best from the film, but neither do they show the faults in the
technique, such as absolutely flat film. it's a good compromise - a stopped
down aperture masks a lot of alignment issues  that look good up to a point
but ask for resolution beyond that point, and the problems begin.
I think this is what we are coming across with the new high end prosumer
scanners.
If you want the ultimate - a 4000 dpi scan, with edge to edge sharpness,
then you may have to accept that you need to use glass holders or take other
measures to ensure flat film.
My point has always been that it is wrong to expect ultimate resolution
corner to corner by just dropping a strip of film in a holder and pressing
'scan'. Nobody in the pro-scanning world of drum scanners does that or gets
that. Nobody in professional darkroom work does that or gets that. So lets
get realistic here...
Maybe, just maybe, Nikons approach has been to use a light source that
requires a wider lens aperture, gaining very high resolution (they come top
in most critical resolution tests) and long term colour stability. Polaroid
have taken a different path, used a different (brighter) light source, a
smaller aperture and gained depth of field, trading off against ultimate
resolution.
Nikon make and sell glass holders for their scanners, so...
You pay your money and you makes your choice...

paul





RE: filmscanners: Nikon film flatness (was Glass slide mounts)

2001-10-20 Thread Bill Fernandez

Paul--

Your post was very sane and reasonable and after reading it I was 
feeling that maybe life isn't so bad after all... until I turned back 
to my shiny new, $1,600 Nikon LS-4000ED and returned to wrestling 
with focus problems.  Your final word is a good one so you don't have 
to respond, but I'd at least like to share my thoughts with the list.

Three years ago I bought a 2,400 dpi Minolta Scan Dual for $500 which 
was the best I could afford at the time.  It scans one of my favorite 
Kodachrome 64 slides with even sharpness across the entire field, 
even into the corners, albeit only at 2,400 dpi.  Now, three years 
later, I spend three times as much for a top of the line scanner with 
two or three generations of improvement.  I find that on this 
favorite slide I can get it sharp in the center and fuzzy in the 
corners or vice versa.  Or, if I set the focus point (numerically) 
halfway in between then I get maximum sharpness in a ring-shaped 
region, while the center and corners are BOTH out of focus.

Now there's nothing wrong with this in principle, and I wouldn't mind 
if it was only a little bit out of focus, it's just that (with the 
focus at the halfway point) the center and corners are no sharper 
than my three year old scanner is across it's entire field.  So it's 
very disappointing to wait three years and spend three times as much 
to get no better sharpness across the field than what I've already 
got (other things are LOTS better, but here I'm concentrating on the 
focus problem).  Now even this wouldn't be so bad if all the other 
scanners had the same problem.  But I've never heard about this as an 
issue with the Polariod SprintScan 4000, or the Canon FS4000, or 
higher end scanners such as the Imacon flextites (although there was 
a recent post by a person who's had this issue with his Artixscan 
4000).

So here I am with thousands of cardboard mounted Kodachromes, of 
which perhaps a hundred are worth some serious attention, and I have 
to think:  If I focus near the center and let the edges and corners 
go so fuzzy that (depending on the slide) they're no better than a 
1,000 to 2,400 dpi scanner, is that good enough for images I really 
care about?  Will the fuzziness show on the largest prints I'm likely 
to make?  Am I willing to put up with the incredible hassle of glass 
mounting a hundred (or hundreds?) of slides?  And when I get to my 
negative strips, will I have to slice the good ones out of the 
middles and glass mount them too?  Would I have avoided this problem 
entirely had I bought a Polaroid or Canon?

I wouldn't mind if the sharpness only varied a little bit across the 
field.  But losing half the resolution of the scanner is highly 
unsatisfactory, both intellectually and visually.

--Bill




At 5:23 PM -0700 20-10-01, PAUL GRAHAM wrote:
Hi all,

My opinion on film flatness has been explained before, so this will be my
final word on the topic
-- 

==
Bill Fernandez  *  User Interface Architect  *  Bill Fernandez Design

(505) 346-3080  *  [EMAIL PROTECTED]  *  http://billfernandez.com
==