THE BIRD PHOTOGRAPHER'S OUTFIT 7 



by five inches, whicli will also be found to be large 

 enough for the portrayal of nests and eggs. 



The 4X5 also reduces proijortionately in making 

 lantern slides, and if the picture is made the long 

 way (jf the plate — that is, higher than broad — it can 

 be easily adapted for illustrative purposes in duo- 

 decimo or octavo books. When a larger picture is 

 desired it can readily be made by enlargement, an 

 increase in size of three diameters, or six times the 

 area, being possible from a sharp negative without 

 undue loss of definition. 



For use from a tripod any one of the several ex- 

 cellent long-focus cameras now on the market will 

 be found to answer every requirement. If it is pro- 

 posed to employ a telephoto lens, care should be 

 taken to select the camera combining greatest bel- 

 lows length with rigidity. A reversil:)le l)ack in- 

 creases the size somewhat but adds to the length of 

 bellows, and will be found serviceable in the many 

 awkward situations in which the bird photographer 

 is often placed by the nature of his subjects. 



The Kearton brothers have an "adjustable min- 

 iature" on the top of their camera, which they state 

 " is used as a sort of view finder when making studies 

 of flying birds. When fixed in position and its 

 focus has been set exactly like its working com- 

 panion beneath it, both are racked out in the same 

 ratio l)y the screw dominating the larger appa- 

 ratus." * The purposes of this attachment, however, 



* From Wild Life at Home, liow to Stuily and Pliotograjih It, 

 by R. Kearton, illustrated by 0. Kearton ; a work of tbe utmost 

 interest to the animal photographer, who should also read With 

 Nature and a Camera, by the same authors (Cassell & Co.). 



