Hi Roland,

Sorry, but the Horizon 202 cameras are not focused at infinity, as I have
shown in a related posting, citing the Noblex 135 series (same format)
models, but more like focused at a mid-distance of 7m or so. The noblex
135 models are focused at an even farther mid-distance point (7.5m), as
shown by the comparison of focusing tables for the two cameras in my
posting. For both the horizon 202 and Noblex 135 (and 150 series) cameras,
infinity is on one edge of the hyperfocal setting, rather than at the
precise focusing point. So any calculations assuming an infinity focus are
simply in error, yes?

Second, the critical value is not focal length variations of the lens etc.
but whether the (curved) plane of focus is placed on the (curved)
emulsion. See critical focusing at http://medfmt.8k.com/mf/critical.html

regards bobm
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* Robert Monaghan POB 752182 Southern Methodist Univ. Dallas Tx 75275 *
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