[filmscanners] RE: HP PhotsSmart - questions

["Laurie Solomon" <laurie@advancenet.net>]

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 should start
by cleaning the glass bed with a soft lintless cloth and a little
Windex, being careful not to let any of the liquid run off the glass and
into the internal areas of the scanner.  As for the other parts, you
need to be careful not to scratch or leave lint on the surfaces of the
optics and mirror.  I suspect that one would also need to be careful
about what solutions one uses to make sure that they do not leave their
own film residue over the optics and mirror, don't contain anything that
will deteriorate the internal parts, and do not damage the electronic
components and elements.

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 ( and if the latter,
what type of print laser, inkjet, etc.)  The answer to this could
furnish some indications of the reasons for this.

----Original Message----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk] On Behalf Of
rkoziol3@comcast.net
Sent: Saturday, August 06, 2005 8:37 AM
To: laurie@advancenet.net
Subject: [filmscanners] HP PhotsSmart - questions

> Hi,
>
> Been reading the posts here for quite some time.  Just got
> into scanning.  In fact the recent thread on Cheap Film
> Scanners woke me up :-)  I have one that's at the bottom of
> that heap.  It's HP PhotoSmart vintage 1997.  SCSI interface,
> which makes it S10 I guess.
>
> I'm using the current version of HP software from their Support site.
> Did a calibrate with a white piece of paper (the card is
> gone). The scanner was donated by a friend.
>
> Now the question.  I started with a simple color print (3x5)
> scan and noticed that setting it to 150dpi gives a "sharper"
> result than 300dpi.
>
> Can that be explained in any way?  Saved as bmp and jpg, same results.
>
> Secondly, should I take the scanner apart and attempt to
> clean any optical components?  I'm quite handy with small
> tools :-)  After sitting for so many years and some usage by
> the previous owner, it must have some film whatever the
> optical pickup is.
>
> Regards,
>
> Rich Koziol
>
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