home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!usc!sdd.hp.com!saimiri.primate.wisc.edu!ames!titan.ksc.nasa.gov!k4dii.ksc.nasa.gov!user
- Newsgroups: rec.photo
- Subject: Re: cat(mirror) lens questions
- Message-ID: <fred-mckenzie-220193141334@k4dii.ksc.nasa.gov>
- From: fred-mckenzie@ksc.nasa.gov (Fred McKenzie)
- Date: 22 Jan 93 14:33:10 EST
- Followup-To: rec.photo
- References: <1993Jan18.005342.649@wsuhub.uc.twsu.edu>
- Distribution: world
- Organization: NASA/Kennedy Space Center, Florida
- Nntp-Posting-Host: k4dii.ksc.nasa.gov
- Lines: 39
-
- In article <1993Jan18.005342.649@wsuhub.uc.twsu.edu>,
- krschimm@wsuhub.uc.twsu.edu (Karl Schimmel) wrote:
- > I'm looking at a Samyang 500mm/f8.0 Cat(mirror) lens, has anyone hear of this
- > company or had any experience with them?
-
- Karl-
-
- Since no one has commented all week, I thought I'd take a crack at it!
-
- I have 3 "Cat" lenses. One has a Pentax mount, with specs similar to the
- Samyang you described. I think it is a Soligor, but don't remember.
-
- Another is a Celestron "C-90" 1000mm f/11, which uses the "T-mount" system
- to attach to a camera body.
-
- The third is a Minolta 500mm f/8 Auto Focus. This is reputed to be the
- only AF Cat lens in production.
-
- These lenses all have some common faults:
-
- They don't focus very close.
-
- They are very difficult to focus manually, since the split-image
- focusing
- aid turns half-black for such small apertures.
-
- There is light fall-off at the edges or a hot spot in the center,
- depending on how you look at it!
-
- Of the three, the Minolta AF lens is head and shoulders above the others.
- It is a real pleasure to use. Like the Soligor, it is compact and
- lightweight, but is much easier to use because of the AF capability.
- Although it has some light fall-off, it isn't objectionable.
-
- In your case, the Samyang may be good for you if the price is right.
- However, only you can decide if you can focus it easily enough. Try it out
- in the store first.
-
- fred-mckenzie@ksc.nasa.gov
-