72 PHOTOGRAPHY FOR NATURALISTS. 



advises the use of a square frame, into which the 

 camera fits pointing downwards ; an additional leg to the 

 stand, and a wide angle lens for the purpose of securing 

 life-size pictures of small objects. There is not any 

 trouble about the water, as only sufficient to cover the 

 fish is needed, but there is very great trouble with 

 reflections from the sky. Without some kind ot 

 shading it is impossible to avoid them, and shading in 

 this country usually means such a prolongation ot 

 exposure as cannot be afforded with moving fish. The 



Gudgeon. 



writer has hitherto failed to secure a vertical photo- 

 graph of a living fish without the addition of some 

 reflection, which has spoilt half the plate. 



As regards the actual process of photography with 

 the tanks described above, there are no particular 

 difficulties other than those to be found in all 

 instantaneous work under unfavourable conditions 



