Olympus-OM
[Top] [All Lists]

[OM] New lens tests

Subject: [OM] New lens tests
From: Gary Reese <pcacala@xxxxxxxxxxxxx>
Date: Thu, 16 Dec 1999 22:46:03 -0800
Here are a number of new tests done on Zuiko lenses and on the Olympus
IS-3.  This includes tests of second samples of some lenses already
done, but most importantly, some lenses that haven't been done!

Note that I have a new ISP and my e-mail address is changing to:
pcacala@xxxxxxxxxxxxx 

Gary Reese
Las Vegas, NV
*******************

180mm f/2 Zuiko (multi-coated)
OM-4T with mirror and diaphragm prefire
Distortion: slight pincushion
Aperture  Center    Corner   Vignetting  Contrast
f/2       B+        B        B-          mod. high
f/2.8     A-        B+       A           mod. high
f/4       A-        A-       B+          high
f/5.6     A         A+       A-          very high
f/8       A         A        A-          high
f/11      A+        A-       A           extr. high
f/16      A-        A        A           very high
f/22      A         B+       A           very high

180mm F/2 (multicoated) with Olympus 1.4x teleconverter
OM-4T with mirror and diaphragm prefire
Distortion: slight pincushion   
Aperture    Center    Corner   Vignetting  Contrast
f/2 (2.8)   C         B+       A-          high
f/2.8 (4)   A+        A-       A           very high
f/4 (5.6)   A+        A-       A           very high
f/5.6 (8)   A-        B+       A           high
f/8 (11)    A         B+       A           high
f/11 (16)   A         A        A           very high
f/16 (22)   A         A-       A           very high
f/22 (32)   A         A-       A           very high
                
180mm f/2 Zuiko (multi-coated) with Olympus 2x teleconverter
OM-4T with mirror and diaphragm prefire
Distortion: pincushion  
Aperture    Center    Corner   Vignetting  Contrast
f/2 (4)     C         C        B           very low
f/2.8 (5.6) B+        C+       A           high
f/4 (8)     A-        B        A           very high
f/5.6 (11)  B-        C+       A           moderate
f/8 (16)    B         B-       A           moder. low
f/11 (22)   B         B-       A           moder. low
f/16 (32)   B-        B-       A           moder. low
f/45        C+        C+       A           moderate
                
90mm f/2 Zuiko (multi-coated) with 1.7x teleconverter for IS/3
OM-4T with mirror and diaphragm prefire
Distortion: pronounced pincushion       
Aperture* Center    Corner   Vignetting  Contrast
f/2       B-        C-       B           moderate
f/2.8     B         C-       B           moderate
f/4       B         C+       A-          mod. high
f/5.6     B         B-       A-          moderate
f/8       B         B-       A-          moderate
f/11      B         B        A-          mod. low
f/16      B         B        A-          mod. low
f/22      B         B-       A-          mod. low
Notes: *aperture on primary lens.

21mm f/2 Zuiko (multicoated)
OM-4T with mirror and diaphragm prefire
Distortion: waveform
Aperture  Center    Corner   Vignetting  Contrast
f/2       B+        C        D           mod. high
f/2.8     B+        C+       C           mod. high
f/4       A-        B+       B           very high
f/5.6     A-        A-       B           extr. high
f/8       A         B+       A-          very high
f/11      A-        B+       A-          very high
f/16      A-        B+       A-          very high

Olympus IS-3
at 35mm
Distortion:
Aperture  Center    Corner   Vignetting  Contrast
f/4.5     B+        C+       C+          mod. high
f/5.6     B         C+       B           high
f/8       B+        B        A-          high
f/11      B+        B        A-          high
f/16      B         B+       A-          high
f/22      B         B+       A-          high

at 100mm
Distortion: pronounced pincushion
Aperture  Center    Corner   Vignetting  Contrast
f/5.6     B-        B-       B           mod. high
f/8       B         B        A-          mod. high
f/11      B+        B+       A-          mod. high
f/16      B         B        A-          mod. high
f/22      B-        B        A-          mod. high

at 180mm
Distortion: pronounced pincushion
Aperture  Center    Corner   Vignetting  Contrast
f/5.6     C+        B-       B           very high
f/8       B         B        A-          very high
f/11      B+        B+       A           very high
f/16      B+        B+       A           very high
f/22      B-        B        A           very high

at 180mm plus Olympus 1.7x teleconverter
Distortion: pronounced pincushion
Aperture* Center    Corner   Vignetting  Contrast
f/5.6     C+        C-       C           moderate
f/8       B-        C+       B           very high
f/11      B-        B-       B+          very high
f/16      B         C+       B+          mod. high
f/22      B-        C+       A-          mod. high
Notes: *approximate aperture

35mm F/2 Zuiko (multi-coated)
OM-4T with mirror and diaphragm prefire 
Distortion: NA
Aperture  Center    Corner   Vignetting  Contrast
f/2       C         B-       B-          moderate
f/2.8     C+        B-       B           moderate
f/4       B+        B+       A-          high
f/5.6     A         A-       A           very high
f/8       A         A-       A           high
f/11      A         A-       A           mod. high
f/16      A-        A-       A           mod. high

100-200mm f/5 S Zuiko
OM-4T with mirror and diaphragm prefire
at 150
Distortion: None
Aperture  Center    Corner   Vignetting  Contrast
f/5       A-        B+       A-          high
f/8       A-        B+       A-          high
f/11      B         B        A           high
f/16      B         B        A           moder. high
f/22      B+        B        A           mod. high
f/32      B         B        A           mod. high

< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


<Prev in Thread] Current Thread [Next in Thread>
  • [OM] New lens tests, Gary Reese <=
Sponsored by Tako
Impressum | Datenschutz