THE BIED PIIOTiXiRAPIIER'S OUTFIT 



17 



background hoing sharply defined, while with the 

 eight-inch all are in focus. 



The telephoto gives an enlargement of about six 

 diameters of the image thrown by eight-inch lens, 



5. The IjirJ in Tust No. 2 enlarged about three Jianitter.s. 



and three diameters increase of that of the fourteen- 

 inch lens. It practically restricts the picture to the 

 immediate surroundings of the bird, and is without 

 focal depth. 



Having now made three good negatives in the 

 field, we may, by enlargement, improve on the image 

 of the bird obtained. The possibilities in this direc- 

 tion are clearly shown by the three enlargements 



