34-' 



Till-. GLIDE TO XATI kK 



The Protar for Nature Work 

 BY BERRN IIYI'KKFOCUS. 



If I could afford but one lens for 

 nature work, I should select a Protar. 

 To go with this work give me a long 



A PHOTOGRAPH BY THE AMERICAN MAKE 

 OF PROTAR Vila. 



By L. F. Brehmer, Rutland, Vermont. 



focus camera with plenty of bellows 

 room, abundant plate holders and a 

 heavy, rigid tripod. To be sure, a 

 reflecting camera would present many 

 advantages, but the lack of one will not 

 preclude the possibility of successful 

 nature work, for much of the results 

 in this highly interesting branch of 

 photography lie in the ingenuity of the 

 amateur in approaching his quarry 

 through proper appreciation of the hab- 

 its of the game. The animals you are 

 after have long periods of comparative 

 rest when they fancy they are alone in 

 the woods, and a study of their habits 



will give the amateur many a pnuto- 

 graphic shot even with the non-reflect- 

 ing camera. 



A capital addition to the photographic 

 outfit is a tilting tripod top, by which 

 the camera may be pointed upward at 

 an angle so as to take a tree branch or 

 a nest without disturbing the centre ot 

 gravity of the camera, or in such cases 

 where you photograph downward on 

 flowers or ground nests, the attach- 

 ment will be found invaluable. A tri- 

 pod brace to lock the tripod legs to- 

 gether is another useful accessory, and 

 will save many an upset of the appar- 

 atus. 



A Protar lens is composed of two 

 complete corrected lenses, and, strange as 

 the claim may be, the single elements 

 of the Protar are corrected well enough 

 for architectural tasks, w r hile their 

 speed is equal to the ordinary doublet 

 known as the "rapid rectilinear," sup- 

 plied on most cheap cameras. 



When your Protar is selected with 

 single elements which are alike, the 

 speed of the doublet is F 6.3. When 

 the elements are unlike, the speed 

 drops to F 7 and to F J.J in cases 

 where the focal lengths of the elements 

 are widely dissimilar. Used alone, the 

 single elements give speed ratings of 

 F 12.5 and therefore require when 

 wide open exposures four times as long 

 as the doublet at its full opening. 



The Convertible Protar can be easily 

 adapted to between — lens metal shut- 

 ters and arranged in addition so as to 

 provide for the further accession of ele- 

 ments of still different focal lengths. 

 Such a collection of lenses mounted to 

 interchange is known as a Protar Set 

 and the possessor of such a set can 

 tackle almost any photographic prob- 

 lem and feel certain that an appropri- 

 ate focal length will be found in some 



