14 



lUlil) STUDIES WITH A CAMERA 



obtained uiulur the same conditions witli different 

 lenses. 



Placing a mounted Flicker {Colcvptes auralus) on 

 a fence post, and setting up my tripod at a measured 





fi-i-^'^A.*.^^ 







'i. Li'lis Test X". 1. ,M(.unl('il Flicker i.ii i\-\wv post, dishmrc fil'ty fi-L't. 



Eiglil-inrli I'c.riis, Zuiss Ci.iiVL'rtil.lr, No. Id, Scrii's XWa Irlis; iTia- 



pliragiii K. s, '/■i6 M-'|'"ii'l ; <'ninui- "('niwii" plate. I'lMitnuTiiplaJ at 

 noon, ill siiiiiii^'jit, Novciiiiiur uO, l^'J'J. 



distance of fifty feet, a series of test cxiiosures was 

 made, of wliicli threi^ arc presented as follows ; First," 

 eiglit-iii(di lens (Zeiss Cimvertible Series VII u. No. 

 10), st(>]i F. S, time Jr, second ; second,* fourteim-incll 

 front lens of tlie condiination, sto]i F. l(i (('(piivalent 



