18 BIRD STUDIKH WITH A CAMERA 



aecompjiiiying the contact prints from their respec- 

 tive negatives. In each instance the enlargement is 

 al)ont throe diameters, and the telephoto negative 

 of course fiirnishes tlie most satisfactory picture. 



i;. Lflis Test No. .-1. Sunif slllijiTt, .listaliri'. lihite, alid diitr :ib Trsts Nos. 

 'A Mid ?,. KiKlit-iii.'h Zi.!iss ('niivi.Tl.il.li', Srrifs VU II, No. lii, with ti-lc- 

 pliiito attiicliiiii'iit ; 'li;iii]ii-;iL,'iii F. ^; t\\'i.'iily-(UK--iiicli ln.'lli'\\.s ; one yuc- 

 oihl C/i wroiiil wiiK later f'uuiid tn lie lull time). 



Wlien the diflficnlties of tele]ihotogra.phy are consid- 

 ered, however, and the ^^^-second exjiosure of the 

 fourteen-inch lens, which ])ermits of hand work, is 

 comjiared with the one second of the telejjhoto, we 

 believe that for genera-1 work in photographing 



