Reflex. - Single Lens Reflex
Digital SLR referes to "digital single-lens reflex." This terminology is often used when speaking about cameras. Such cameras can allow the photographer to change lenses as he or she sees fit.
S = Single L = Lens R = Reflex
J. R. G. Smyth has written: 'Parameters and intervals for 35 mm. aerial photography' -- subject(s): Aerial photography, Miniature cameras
Dale R. Wright has written: 'The ABC's of picture-taking ease with the Canon AE-1 and/or AV-1 cameras' -- subject(s): Canon camera, Handbooks, manuals, Photography
L. H. R. Wijetunga has written: 'Portraits of a nation' -- subject(s): Biography, Photography of children, Photography of men, Photography of women, Portrait photography, Portraits
Diane R. Curtis has written: 'Intimations' -- subject(s): Artistic Photography, Photography, Artistic
David R Redsicker has written: 'The practical methodology of forensic photography' -- subject(s): Legal photography
R. L. Aspden has written: 'Electronic flash photography' -- subject(s): Photography, Flash-light
R. Schreyer has written: 'Dictionary of photography and cinematography'
R. Taft has written: 'Photography and the American scene'
Its not a Single Lens Reflex.
The R in the RSPAC stand for Royal.