Apparent SLR Finder Size (APS-C and Four Thirds sensors) |
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Some time ago I made a graph comparing the apparent viewfinder size for a number of SLRs, just to show what the specs really mean. A number of Readers asked if I would expand that comparison, including also the newer models. So here it is. The apparent viewfinder size, computed in a given dimension, is a product of three values:
The result of the multiplication will be in millimeters, and it does not reflect the finder image size as perceived by a human viewer. What is important, however, is that the former is strictly proportional to the latter, so that results can be directly compared between different cameras. Similarly, the area values in mm2 do not make sense as absolute values, but can be meaningfully compared between various models. Here is a table I compiled from manufacturers' specs published on the Web. The second column ("Model") lists the most recent model with given specs; the last one ("Same as") adds models of exactly the same parameters. While I was trying to avoid any transcription errors, some may have crept in; let me know if you spot anything fishy here, and I will verify the offending data item, correcting it if necessary. The finder magnification and coverage are rounded by the manufacturers to the nearest 0.01 (approx. 0.5% maximum error), which, when added together, may result in an error of up to 1%. This is why differences below that value are not significant. |
Brand | Model | Sensor size, mm | Coverage | Magnification | Apparent size, mm | Area, mm2 | Same as |
---|---|---|---|---|---|---|---|
Canon | 50D | 14.8×22.2 | 95% | 0.95× | 13.4×20.0 | 268 | 40D |
30D | 95% | 0.90× | 12.7×19.0 | 240 | 20D | ||
450D (XSi) | 95% | 0.87× | 12.2×18.3 | 224 | |||
1000D (XS) | 95% | 0.81× | 11.4×17.1 | 195 | |||
400D (XTi) | 95% | 0.80× | 11.2×16.9 | 190 | 350D (XT) | ||
Nikon | D300 | 15.7×23.5 | 100% | 0.94× | 14.8×22.1 | 326 | |
D90 | 96% | 0.94× | 14.2×21.2 | 300 | |||
D200 | 95% | 0.94× | 14.0×21.0 | 294 | D80 | ||
D60 | 95% | 0.80× | 11.9×17.9 | 213 | D40, D40x | ||
D50 | 95% | 0.75× | 11.2×16.7 | 187 | D70 | ||
Olympus | E-3 | 13.0×17.3 | 100% | 1.15× | 15.0×19.9 | 297 | |
E-30 | 98% | 1.02× | 13.0×17.3 | 225 | |||
E-620 | 95% | 0.96× | 11.9×15.8 | 187 | |||
E-520 | 95% | 0.92× | 11.4×15.2 | 172 | E-410, E-510, E-420 | ||
E-500 | 95% | 0.90× | 11.1×14.8 | 164 | |||
Pentax | K200D | 15.7×23.5 | 96% | 0.85× | 12.8×19.2 | 246 | K2000 (K-m) |
K20D | 95% | 0.95× | 14.2×21.2 | 300 | |||
Sony | A200 | 15.7×23.5 | 95% | 0.83× | 12.4×18.5 | 229 | A100 |
A350 | 95% | 0.74× | 11.0×16.5 | 182 |
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Posted 2009/01/17; last updated 2009/06/10 | Copyright © 2009 by J. Andrzej Wrotniak |