From this study, which has principally concerned the
guillotine shutter, can we draw the deduction that this type of
apparatus will become a definite one? We think not. In fact, along with
its decided advantages the guillotine has a few defects that cannot be
passed over in silence. The aperture, in measure as it is increased,
renders the apparatus delicate and subject to become bent. If, in order
to obviate this trouble, we employ plates of steels, we increase its
weight considerably, and the chamber becomes subject to vibration at the
moment the shutter drops. If rubber or springs are used for increasing
the velocity, it is still worse. Moreover, it is quite difficult to
obtain a graduation, and to our knowledge, and probably for this reason,
it has not yet been applied.
The reader will please excuse us for this perhaps somewhat dry
theoretical _expose_, but we have thought it well to give it in the
hope that it might well show the qualities that should be required of a
photographic shutter and particularly of the guillotine.
Pages:
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181