Hi all:
For those of you that will be submitting lens tests to me for the FAQ
from either MP or PopPhoto, I've tweaked the formats a bit:
Fixed lens, MP:
21/2 MC (5/81 pp. 104-105):
Actual: 20.15/1.91, Distortion: 0.9% barrel, Falloff: 1.12 stops at f/5.6
2 2.8 4 5.6 8 11 16
Resolution (lines/mm) at 1:49x
Center: VG 49 Ex 62 Ex 87 Ex 87 Ex 78 Ex 69 Ex 62
Corner: VG 31 VG 35 VG 39 VG 39 Ex 44 Ex 44 Ex 49
Contrast (%) at 30 lines/mm
Center: Low 40 Low 46 Low 48 Low 56 Low 58 Low 51 Low 46
Corner: Low 18 Low 20 Low 30 Low 40 Med 42 Low 42 Low 42
Fixed lens, PopPhoto:
24/2 MC (??/?? pp. XXX-XXX):
Actual: 24.73/2.06, Distortion: above average barrel
Centering: near-perfect, Flare: 0.6%, Transmission: 94%
Percent contrast of 0.01mm slit image:
2 2.8 4 5.6 8
Center 51 76 82 83 83
1/3rd out 50 67 68 67 66
2/3rds out 44 51 55 50 55
Far edge 40 41 55 70 69
Zoom lens, MP:
35-70/3.6 MC (MP 1/80):
35: Actual: 36.26/3.63, Distortion: 1.34% barrel, Falloff: 0.75 stops at
f/5.6
70: Actual: 68.57/3.66, Distortion: 1.78% barrel, Falloff: 0.5 stops at
f/5.6
3.6 5.6 8 11 16 22
Resolution (lines/mm) at 35mm at 1:48x
Center: Ex 54 Ex 60 Ex 68 Ex 68 Ex 60 VG 48
Corner: Ex 34 Ex 43 Ex 48 Ex 48 Ex 43 VG 38
Contrast (%) at 35mm at 30 lines/mm
Center: Hi 50 Hi 52 Med 52 Med 49 Low 45 VL 39
Corner: Med 24 Med 32 Med 41 Med 41 Med 38 Low 30
Resolution (lines/mm) at 50mm at 1:48x
Center: Ex 60 Ex 68 Ex 68 Ex 68 Ex 60 VG 48
Corner: Ex 34 Ex 43 Ex 43 Ex 48 Ex 43 VG 38
Contrast (%) at 50mm at 30 lines/mm
Center: Med 49 Med 51 Med 53 Med 53 Low 45 VL 39
Corner: Low 20 Low 22 Low 29 Low 29 Low 27 VL 23
Resolution (lines/mm) at 70mm at 1:52x
Center: Ex 66 Ex 66 Ex 73 Ex 73 Ex 58 Ex 52
Corner: Ex 41 Ex 46 Ex 46 Ex 41 VG 37 Ex 41
Contrast (%) at 70mm at 30 lines/mm
Center: Med 42 Med 49 Med 52 Med 52 Low 46 VL 40
Corner: Low 17 Low 18 Low 29 Low 30 Low 27 VL 22
If someone will send me a zoom lens test from PopPhoto, I'll come up
with a format for that. I still have to do the format for a macro, but
it will look almost exactly like the multiple format for a zoom, except
with different mags instead of different focal lengths. Likewise, the
format for tilt/shift (PC) lenses will have the results from different
offsets.
Let me know what you think. I hope this new format is a little clearer.
And thanks again to all of you who have submitted tests.
Gary: If you could get me page numbers for the MP and PP tests you sent,
along with dates for the PP tests, that would be good. I've decided to
include page numbers to make it easier for others to get the tests via
ILL, or save them time when they go to the lib to do the legwork
themselves.
Sometime tomorrow I hope to post all I have up to this point. I still
have some zooms and a PC and Macro lens to add in. And I spent the day
shopping for Oly stuff (more about that in my next message).
Cheers,
--Lee
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