OK, I give up, I'm beginning to sound like an echo in here...
You're just one step (or more) ahead on me each time I post... I best
read your replies before answering ;-)
Art
[EMAIL PROTECTED] wrote:
If the optical resolution is variable and YES there are scanners that
can do it (they have
That's what I thought also... although I'm a bit late on this (again!)
Art
[EMAIL PROTECTED] wrote:
Lens coatings MUST be on the outside surface of the lens or else they
don't work. Pretty much, they would be on every glass-air interface.
Mr. Bill
Laurie Solomon wrote:
Without trying to
:[EMAIL PROTECTED] On Behalf Of Arthur Entlich
Sent: Monday, August 08, 2005 4:45 AM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
The native optical resolution of this scanner varies
dependent upon the size of the image being scanned. In the
case of 35mm film, which
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, August 08, 2005 12:10 AM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
This was the head of Schneider Optics USA service.
Mr. Bill
P.S. The original question
I had a problem obtaining isopropyl alcohol about 2 months
ago and the chemists - about half a dozen local ones - all
said it was due to new (?) fire regulations. However, I did
find one in Marlow, Bucks who had a full 500ml bottle and
also a half full one.
Unsure where we get our IPA (not
PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Rich Koziol
Sent: Saturday, August 06, 2005 1:01 PM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
On 6 Aug 2005 at 12:06, Laurie Solomon wrote:
As for the question of why 150 dpi appears sharper than
300 dpi when
scanning
I can't speak for any desktop scanner, we never discussed AR coating
while I was at Agfa, but every Scitex scanner has an AR coated flatbed.
Mr. Bill
Arthur Entlich wrote:
I have yet to see an anti-reflective coating on the glass of a flatbed
scanner, and I have owned half a dozen different
, 2005 8:39 AM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
I was surprised, but the Schneider guy recommended the dilute
Windex solution without any reservations.
Mr. Bill
Laurie Solomon wrote:
I would speculate that the impact that various dilutions
]
[mailto:[EMAIL PROTECTED] On Behalf Of Arthur Entlich
Sent: Monday, August 08, 2005 4:45 AM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
The native optical resolution of this scanner varies
dependent upon the size of the image being scanned. In the
case of 35mm
Fair enough, I have never purchased a high end professional scanner of
the value of a Scitex model. You make a good point. For the average
user, I don't think even the better quality desktop scanners use AR
glass. It is just too costly. In fact, I don't even think most desktop
scanners use
PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, August 08, 2005 2:55 PM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
If the optical resolution is variable and YES there are
scanners that can do it (they have to be able to change the
distance between
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
Anti-reflection coating on the flatbed of a scanner has
nothing to do with uncovered parts of the flatbed and
everything to do with the fact that anytime the image forming
light hits a glass-air surface there is the potential
You are not wrong, but you have very much oversimplified things.
Basically, the optical resolution of a scanner is determined by how many
pixels the sensor (CCD,CMOS) captures and how wide a strip the scanner
scans.
So, a scanner with a 5,000 element (pixel) sensor that covered a strip
1 wide
Laurie,
You've got things oversimplified here, or maybe disconnected.
Yes, stray light inside the scanner (from having artwork not covering
the entire flatbed) is an issue and affects (reduces) contrast (but may
improve shadow detail), however this is NOT controlled by AR coatings on
the lens or
Stripes and strips may not be the same. One CCD 'strip' could
capture three scan 'stripes' for each scan line via three different color
filters. Problem is that we don't know today what the HP writer meant by
the term stripes in 1997-98.
Bob Shomler
[EMAIL PROTECTED] wrote:
Don't confuse a
In '97-'98 they were probably trying to describe a tri-linear array so
I'd take that as stripes, and bet my own money on it. Almost every
scanner out at that time used tri-linear arrays. The price-point of the
HP would prevent them from profitably installing multiple CCD's and it's
not a
On 8 Aug 2005 at 16:40, [EMAIL PROTECTED] wrote:
Stripes and strips may not be the same. One CCD 'strip' could
capture three scan 'stripes' for each scan line via three different color
filters. Problem is that we don't know today what the HP writer meant by
the term stripes in 1997-98.
electronics grade alcohol may possibly be isopropyl alcohol
Here in the UK at least a long time ago I found no one would sell isopropyl
alcohol
probably due to government restrictions.
denatured
alcohol is methylated spirits here in the UK.
Yes, and it seems impossible to find what the
I do not have answers to the question of cleaning the internal optics,
mirror, or sensors; nor do I have an answer to why 150 dpi appears
sharper than 300 dpi when scanning a 3 x 5 color print. I take it that
this is a flatbed scanner.
I would suggest the obvious with respect to cleaning. You
Windex contains amonia which can etch coatings. Never use it on optics.
Electronics grade alcohol is generally accepted as best for optics. I
use cottonballs rather than cloth.
Laurie Solomon wrote:
I do not have answers to the question of cleaning the internal optics,
mirror, or sensors; nor
On 6 Aug 2005 at 12:06, Laurie Solomon wrote:
As for the question of why 150 dpi appears sharper than 300 dpi when
scanning a 3 x 5 color print, you did not tell us if the result you
speak of was on the monitor or on a hard copy print
At this point I'm just looking at the results on a 19inch
When I was in the camera repair business I used denatured alcohol cut
5-% with ether. The ether dispersed water droplets and promoted faster
drying. Other recommendations from factory repair houses included MEK
and distilled water with a drop or so of mild dish washing detergent.
Jim
lists
I had (still have one in a box somewhere upstairs) and
the calibration card was not a sheet of paper but
looked like a 5x7 glossy paper that one half white and
half black. You insert the white part first and then
the calibration occurs as it scans the black part. As
to cleaning the sensor, IIRC,
You are mistaken. I've communicated with the head of service for
Schneider Optics and Windex diluted 50:50 with water is the #1 thing he
recommends for cleaning lenses.
Most lens cleaners are water bases, not alcohol based.
Mr. Bill
lists wrote:
Windex contains amonia which can etch
as long as they do not leave behind
any form of lint or cotton strings or dust.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of lists
Sent: Saturday, August 06, 2005 12:43 PM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
PROTECTED] On Behalf Of Rich Koziol
Sent: Saturday, August 06, 2005 12:56 PM
To: [EMAIL PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
Hi Laurie,
On 6 Aug 2005 at 12:06, Laurie Solomon wrote:
I do not have answers to the question of cleaning the
internal optics,
mirror
They advertise Windex with Ammonia D. Of course it has ammonia. You
can find any number of references that state ammonia destroys coatings:
http://www.opticallabproducts.com/07/young.php
I don't even clean my car windows with windex. I use the same
electronics grade alcohol, especially if I'm
The water would have to be purified as well, else you would get mineral
deposits.
Mike Kersenbrock wrote:
[EMAIL PROTECTED] wrote:
You are mistaken. I've communicated with the head of service for
Schneider Optics and Windex diluted 50:50 with water is the #1 thing he
recommends for cleaning
PROTECTED]
Subject: [filmscanners] Re: HP PhotsSmart - questions
Windex contains amonia which can etch coatings. Never use it
on optics.
Electronics grade alcohol is generally accepted as best for
optics. I use cottonballs rather than cloth.
Laurie Solomon wrote:
I do not have answers
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