The American annual of photography . peeds down to a retarded 3 seconds for stand work.^ A great deal has been written and said regarding the rela- tive advantages of the fixed slot in a focal plane shutter, versusthe adjustable slot. The fixed slot is claimed to be more cer-tain in action, to give a perfectly parallel slot, and to be freefrom curtain trouble. While it is certain in action, and givesa parallel slot, and is free from trouble to a certain extent, Ido not entirely agree with the statement made by users of thisshutter that it is more convenient in use and that the adjustableslot i
The American annual of photography . peeds down to a retarded 3 seconds for stand work.^ A great deal has been written and said regarding the rela- tive advantages of the fixed slot in a focal plane shutter, versusthe adjustable slot. The fixed slot is claimed to be more cer-tain in action, to give a perfectly parallel slot, and to be freefrom curtain trouble. While it is certain in action, and givesa parallel slot, and is free from trouble to a certain extent, Ido not entirely agree with the statement made by users of thisshutter that it is more convenient in use and that the adjustableslot is a source of trouble. Possibly in the case of a verycheaply made and poorly designed curtain shutter, there mightbe trouble, due to faulty workmanship, but not to inherentfaults in the design. The better class of adjustable slot shutters are absolutelyfree from trouble, and in many ways are more convenient thanthe fixed slot. I have had two European reflex cameras inuse under the most adverse conditions for the past four years. 154. ANTOINETTE B. HERVEY. »55 of two well known foreign makes, and have yet to have anytrouble whatever with the shutters. Barring a few drops offine watch oil once or twnce a year, they have had absolutelyno attention and have given the most perfect are the type that sets before winding, by means of thesetting knob. The speeds are indicated directly on the dial,without the use of tables, there is no tension to be changedand the mechanism has (in my case at least) operated to per-fection. There is this to be said anent the fixed slot instru-ment, such as the Pressman, lea Popular, Graflex, and some ofthe cheaper types of foreign cameras, that the mechanism isso simple that in case of trouble, on a camping trip, it wouldprobably be possible to repair or adjust same with less skillthan would be required for such a shutter as the Ensign, orThornton-Pickard, so that for an explorer there might be someadvantage in the fixed slot. On the o
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