LoCA information for all GF zooms and primes

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MOD JimKasson Forum Pro • Posts: 34,023
LoCA information for all GF zooms and primes

All the primes

The above shows the shift of the focal plane along the lens axis between the standard, which is the white-balanced raw signal, and the red raw channel. Negative displacement is front-focusing. Positive displacement is back-focusing. The visual effect of LoCA diminishes as the lens is stopped down because of the extra depth of focus thus obtained. That effect is ignored in these graphs.

All the zooms. Note that the vertical scale is twice that for the primes.

Now for the displacement of the blue raw channel in both cases:



There isn't as much displacement of the raw green channels, since they play a larger role in determining the white-balanced focal plane, but here are the graphs for the green channels:

The 32-64 at 44 mm is amazing.

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