THE BIRD PHOTOGRAPHER’S OUTFIT 15 
to F. 4 of the eight-inch); third,® telephoto attach- 
ment with eight-inch lens, twenty-one-inch bellows, 
stop F. 8 of the eight-inch, time one second. Com- 
menting on the results of these tests it may first be 
8. The bird in Test No. 1 enlarged about three diameters. 
mentioned that in the “ Unicum” shutter employed 
exposures of a so-called “44,” and “35” seconds gave 
exactly the same results both with the combined 
eight-inch lens and the front fourteen-inch lens; the 
actual time, however, was doubtless not far from #5 
of a second. The negatives, therefore, show, in the 
first place, that the long-focus lens is capable of 
doing fairly rapid work, Continuing our compari- 
