INTE( )DUCTION 



I earnestly hope that the photographs in this volume 

 will so effectively illustrate the part the camera may play 

 in definitely recording facts in bird-life, that they will stim- 

 ulate fresh interest in the subject of bird photography. To 

 further this end I add here a word to what 1 have said on 

 the outfit of the bird photographer in "Bird Studies with a 

 Camera ' '. 



Ho far as cameras and lens are concerned, I have found 

 no reason to change the advice offered in that volume. I 

 still use a reflecting camera of the "Granex" type, and also 

 a tripod camera each with a bellows length of fifteen inches, 

 and carrying plates four by five inches. 



With about twenty exceptions all the pictures in this 

 book were made with the lens described in "Bird Studies 

 with a Camera". It is a Bausch & Lomb Convertible Series 

 Vila No. 10, F. (i. 3., with a focal length of eight inches, the 

 component lenses having each a focal length of fourteen 

 inches. Although these single lenses are rated with a speed 

 of only F. 12. 5., I have found no difficulty in making satis- 

 factory pictures of birds in flight with an exposure of one- 

 thousandth of a second, the lens being wide open. 



The single lens will not, of course, do the work of the 

 doublet aud, if one can afford a No. 19 lens (if the same 

 series with a focal length of thirteen and one-eighth inches, 

 the components being each of twenty -three and one-eighth 

 inch focus, he will materially increase his chances of suc- 

 cess ; but were I to be restricted to one lens and one camera, 

 I should take the lens first mentioned, and a camera of the 

 reflecting type. Seventy-five per cent, of the pictures in 

 this book were made with an outfit of this kind. 



