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- Newsgroups: rec.photo
- Path: sparky!uunet!walter!wind!jchen
- From: jchen@wind.bellcore.com (Jason Chen)
- Subject: Re: Resolution of Lens ???
- Message-ID: <1992Nov19.183159.20504@walter.bellcore.com>
- Sender: news@walter.bellcore.com
- Nntp-Posting-Host: wind.bellcore.com
- Reply-To: jchen@wind.UUCP (Jason Chen)
- Organization: Bellcore, Morristown, NJ
- References: <1992Nov18.164258.8766@cello.hpl.hp.com> <1992Nov18.192154.236@cbnewsm.cb.att.com> <1992Nov19.025409.2162@walter.bellcore.com> <1992Nov19.170209.28061@mercury.cair.du.edu>
- Distribution: na
- Date: Thu, 19 Nov 92 18:31:59 GMT
- Lines: 16
-
- In article <1992Nov19.170209.28061@mercury.cair.du.edu> troby@diana.cair.du.edu (Thorn Roby) writes:
- >In article <1992Nov19.025409.2162@walter.bellcore.com> jchen@wind.UUCP (Jason Chen) writes:
- >>However, I don't think 100 lp/mm is hard to achieve. With a good
- >>microscope (not those found in Toys'r Us), TMAX-100, and well saturated
- >>exposures, you should be able to resolve close to 125 lp/mm.
- >>
- >
- >If by "well-saturated" you mean "normally exposed", this runs contrary
- >to my experience. I find when viewing lens chart tests on B&W film on
- >a microscope, I can read them most easily when I push the film a lot,
- >resulting in maximum contrast.
-
- No. That is not what I meant. To maximize the contrast on b&W films,
- you need to over expose a couple of stops.
-
- Jason Chen
-