underwater Photo Course :: (9) The Creative Approach :: Fantasy :: Special Effects Filters
                                
                                
                                    
                                        
                                            Special Effects Filters
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                                            U/W Photo Course
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Special effects filters alter the image formed by the lens without altering 
the spectral characteristics of the light. They are a fun area for 
experimentation but are rarely suited to underwater subjects and consequently 
win few prizes in competition. 
 Special effects filters are more usually 
used with housed cameras as they are designed to only work in the medium of air. 
It is not practical to use filters over supplementary lenses due to 
attachment problems.  
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