All scanners from Nikon have the same problem.
>From: Arthur Entlich <email@example.com>
>Subject: Re: filmscanners: LS 4000 depth of field issue - what about LS
>Date: Mon, 19 Nov 2001 22:04:17 -0800
>I can't say for sure, but the loss of resolution due to reduced DOF with
>bowed source film frames with the Nikon LS4000 ED may have been
>happening with the LS2000 and LS30 also. However, it may have been less
>observable due to lower native resolution and less highly resolved
>lenses. Its possible that Nikon is now pushing the lighting and optical
>path design beyond its limitations. Further many camera lenses soften
>the edges of film frames to begin with, so we've grown to accept a
>certain amount of softness as our eye migrates to the edge.
>Some people feel Nikon's design is the best for its cost, since it
>allows for quite sharp result within the focal area, so anyone needing
>that level of resolution might be willing to use special mounts to
>maintain flatness within the frame.
>That doesn't fit into my workflow, because I have no interest in
>remounting my slides for scanning. One of the reasons I bought a film
>scanner is to avoid taking risks with non-replacable images being
>damaged by lab people, or lost by couriers. Personally, I prefer
>keeping sharp knife blades away from my film, and slide mounts do a
>pretty good jobs of keeping film frames safe. I keep catalogue info on
>my mounts and I don't want to have to remove them and copy it, or return
>film frames to cut mounts.
>I don't know what National Geo does, but I recently saw some of their
>most used images, and most of the slide mounts seemed to be intact.
>Maybe they make use larger format dupes and leave the originals alone
>after making the dupes. I know at one time they were making Cibas at
>100% of size used in the magazine. I'm sure today they use digital
>technologies to get the images onto plate.
>Anyway, whatever the deal is, I want the best scanner for scanning
>originally mounted slides, and therefore for me, the Nikon film scanners
>aren't the answer.
>Ralf Schmode wrote:
>>after reading all that stuff as to the LS 4000 DOF issue, I'd be
>>interested in learning what the LS 30 and LS 2000 owners have
>>experienced in that respect. I have a LS 30 with which I have never run
>>across DOF problems - however, I don't use the motor driven film strip
>>feeder but the tiny metal/plastic film strip holder. If I had to buy a
>>new unit tomorrow, I would, in evaluation of what was written here, most
>>likely go for the LS 2000 or even the LS 30 again rather than pick the
>>newer models that seem problematic in that respect.
>>BTW, *if* there is a difference between LS-30/2000 and LS-40/4000 as to
>>DOF there must be a reason for it. The newer units are said to be
>>equipped with different optical elements (such as new lenses). Can that
>>possibly be a key to that change in depth of field?
>>Greetings from good (c)old Germany -
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