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- Path: sparky!uunet!dtix!darwin.sura.net!jvnc.net!nj.nec.com!lds
- From: lds@ccrl.nj.nec.com (Duan-Shin Lee)
- Newsgroups: rec.photo
- Subject: Re: Canon 10s Vs Nikon N90, Which one?
- Message-ID: <1992Dec28.154707.21408@research.nj.nec.com>
- Date: 28 Dec 92 15:47:07 GMT
- References: <1992Dec23.194028.1848 <1992Dec24.205338.11007@jarvis.csri.toronto.edu> <BzssK3.Kp6@ra.nrl.navy.mil>
- Sender: Duan-Shin Lee (lds@ccrl.nj.nec.com)
- Organization: C&C Research Labs, NEC USA, Princeton, N.J.
- Lines: 41
-
- >In article <1992Dec24.205338.11007@jarvis.csri.toronto.edu>
- >acs@csri.toronto.edu (Alvin
- > Chia-Hua Shih) writes:
- >>In <1992Dec23.194028.18483@jarvis.csri.toronto.edu> I wrote:
- >>3.3) Screens?
- >>What you want is a *real* focusing screen with a split prism or
- >>microprism focusing aid. Can a camera really be "pro" or even
- >>"semi-pro" without decent screens?
-
- > Why do you want a split or microprism screen? First off, with
- >AF, you don't need focusing aid. Second, if you ever use a fast
- >lens, you'll know that split screen or microprism is useless. A fast
- >lens has such small DOF that unless you are lucky, there won't be
- >enough feature for the split screen to split or microprism to merge
- >(for example, a tight head shot with a 1.2 lens that has a DOF of about
- >1/4", where are you going to find vertical feature on someone's face
- >to split the split screen? If you focus on say the person's arm to
- >use the split screen, her face won't be in focus anymore.) One of the
- >few things that I like about AF cameras (obviousely, I don't use one)
- >is that they all seems to have bright plain focusing screen. I
- >absolutely hate it whenever someone hand me their camera with that
- >pin hole zoom and all you see is that black blob in the middle of the
- >focusing screen.
-
- >-Anthony
-
- Besides the above reason, split screen or microprism are not useful
- for closeup photography, because most likely the viewfinder is
- so dark that it is impossible to focuse with these screens.
- Also it is quite painful to focus a moving subject with a split
- screen. It is hard to keep track of the alignment of features
- when the subject is moving. Also, because the split screen uses
- plain glass in the central split area, photographers can easily
- be fooled into thinking that the subject is in focus, while it's not.
-
-
- --
- Duan-Shin Lee
- C & C Research Lab, NEC USA
- Tel:(609)951-2456
- lds@ccrl.nj.nec.com
-