tab@ihuxl.UUCP (Thomas A. Burrows) (06/22/84)
. To fully exploit the zone system, a spot meter is necessary. The narrower the spot, the better. This allows one to meter the luminance of individual objects in the picture and predict what tone each will have in the final print. Much of the time, the 7.5 degree variable angle attachment for the Luna-Pro SBC will be narrow enough. At least it is vastly preferable to an averaging meter. The Luna-Pro SBC has what I have found to be the quickest and simplest operation for the zone system. If one meters an object in the scene and then rotates the dial to null the meter, then that object will get exposure value V. The meter has three divisions either side of the null point. Putting the needle one division to the left, for example, will give a reading that will cause the object to be assigned exposure value IV. What makes this especially easy is that once a tentative exposure is dialed, one can aim the meter in different directions and instantly read off the exposure value (from II to VIII) of various objects in the scene. (The null point corresponding to V.) This allows instant visualization of contrast and how the luminance values of the scene are going to fit into the range of the film and paper. This is also nice for color slide photography. One can quickly tell if a given exposure will cause parts of the scene to go beyond the shadow or highlight range of the film. The SBC is also extremely sensitive. I use one for indoor exposures as long a 4 minutes (on Tri-X).
burton@fortune.UUCP (06/27/84)
#R:ihuxl:-118800:fortune:9300004:000:355
fortune!burton Jun 26 12:25:00 1984
Please comment on sensitivity with the variable angle attachment. Also pricing.
Is there a 1 degree spot attachment for the SBC ? Ditto for above.
Philip Burton 101 Twin Dolphin Drive-MS 133
Fortune Systems Redwood City, CA 94065 (415) 595-8444 x 526
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