ADVERTISEMENTS. 



DALLMEYER LENSES 



For all purposes. In all sizes. 



THE CELEBRATED 



STIGMATIC LENSES. 



Series II. (Convertible.) 

 The complete Lens works at f /6, and the 

 single combinations, giving focal lengths of 

 one and a half times and twice that of the 

 complete lens, at f/16. Cover magnifi- 

 cently over a large field with perfect 

 flatness and freedom from astigmatism. 



The smaller sized stigmatics, 3i and 4in. focal length, are admir- 

 able objectives for low power photo -micrography, their construction 

 rendering them superior to lenses of the symmetrical type. 

 Ask for Booklet "About a Lena." 



DALLMEYER PATENT PORTRAIT LENSES 



In addition to the class of work indicated by their name, these 

 lenses are excellent for natural history work. In the D Series (f/6) 

 a rapid long focus objective is secured, capable of giving more critical 

 definition than the best anaetigmats, at a much lower price. 



Small portrait lens, with apertures of f /3 and f /4, with focal lengths 

 from one inch upwards, are made for microscopical and cinematograph 

 work. Particulars on application. 





THE ADON. 



Simplest, lightest, and 

 cheapest Telephoto Lens for 

 amateur use. Invaluable for 

 Photographing small objects 

 with perfect perspective and 

 depth of focus. 



Send 1or A don Booklet. 



DALLMEYER'S NATURALIST'S CAMERA (New Model) 



Reflex Focussing, Rapid Telephoto Lens, Focal Plane Shutter. 



Invaluable for rapid pictures of inaccessible objects. Used by leading 



Naturalists, Journalists, etc. Send for Camera Booklet. 



Fully illustrated catalogues free on application. 



J. H. DALLMEYER, LTD., 



Denzil Road, Neasden, London, N.W. 



SHOWROOMS : 25, NEWMAN ST., LONDON, W. 



