Alethoscope

An alethoscope (Greek true+view) is an instrument for viewing pictures with a lens to enlarge and show them with natural relations and proportions.^[1] The alethoscope was invented by Carlo Ponti in 1860 and patented in 1861.^[2] It was used to view photographs that were colored, perforated and mounted on a curved frame. The alethoscope showed day-and-night effects whether viewing it against the light or reflect the light by two side mirrors. It is the larger version of a megalethoscope.^[3]

References

↑ http://www.thefreedictionary.com/Alethoscope
↑ Hannavy, John (2007). Encyclopedia of Nineteenth-Century Photography. New York: Routledge
↑ Magic visions before the advent of the cinema by Carlo Alberto Zotti Minici ISBN 9788871152998

External links

Image of an alethoscope advertisement

Precursors of film

Alethoscope Camera obscura Chronophotography Electrotachyscope Flip book Kaiserpanorama Kinematoscope Magic lantern Megalethoscope Mutoscope Peep show Phantasmagoria Phenakistoscope Praxinoscope Shadow play Stereoscope Thaumatrope Théâtre Optique Zoetrope Zograscope Zoopraxiscope

Photography

Outline of photography

Terminology	35 mm equivalent focal length Angle of view Aperture Black and white Chromatic aberration Circle of confusion Color temperature Depth of field Depth of focus Exposure Exposure compensation Exposure value F-number Film format Film speed Focal length Guide number Hyperfocal distance Metering mode Perspective distortion Photograph Photographic printing Photographic processes Reciprocity Red-eye effect Science of photography Shutter speed Sync Zone System White balance

Genres	Aerial Architectural Commercial Conceptual Conservation Cloudscape Documentary Erotic Fashion Fine-art Fire Forensic Glamour High-speed Landscape Lomography Nature Nude Photojournalism Pornography Portrait Post-mortem Selfie Senior Social documentary Sports Still life Stock Street Vernacular Underwater Wedding Wildlife

Techniques	Afocal Bokeh Brenizer Contre-jour Cyanotype ETTR Fill flash Fireworks Harris shutter HDRI High-speed Holography Infrared Kirlian Kite aerial Long-exposure Macro Mordançage Multiple exposure Night Panning Panoramic Photogram Print toning Redscale Rephotography Rollout Scanography Sabatier effect Stereoscopy Stopping down Strip (Slit-scan) Sun printing Tilt–shift Time-lapse Ultraviolet Vignetting Xerography

Composition	Diagonal method Framing Geometry and symmetry Headroom Lead room Rule of thirds Simplicity

Equipment	Camera (light-field field pinhole press rangefinder SLR still TLR toy view) Darkroom (enlarger safelight) Film (base format holder stock) Filter Flash (beauty dish cucoloris gobo hot shoe grid monolight Reflector snoot Softbox wireless sync) Lens (Wide-angle lens Zoom lens Telephoto lens) Manufacturers Monopod Movie projector Slide projector Tripod (head) Zone plate

History	Timeline of photography technology Analog photography Autochrome Lumière Box camera Calotype Camera obscura Daguerreotype Dufaycolor Heliography Painted photography backdrops Photography and the law Glass plate Visual arts

Digital photography	Digital camera (D-SLRs (comparison) MILC camera back) Digiscoping Digital versus film photography Film scanner Image sensor (CMOS APS CCD Three-CCD camera Foveon X3 sensor) Photo sharing Pixel

Color photography	Color Color film (print slide) Color management (color space primary color CMYK color model RGB color model)

Photographic processing	Bleach bypass C-41 process Cross processing Developer Digital image processing Dye coupler E-6 process Fixer Gelatin silver process Gum printing K-14 process Print permanence Push processing Stop bath

Lists	Most expensive photographs Photographers (Norwegian Polish street women)

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