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

"Alethoscope", The Free Dictionary, retrieved 2019-08-23
Hannavy, John (2007). Encyclopedia of Nineteenth-Century Photography. New York: Routledge
Magiche visioni prima del cinema : la Collezione Minici Zotti = Magic visions before the advent of the cinema : Minici Zotti Collection. Zotti Minici, Carlo Alberto., Museo di magiche visioni (Padua, Italy). Padova: Il poligrafo. 2001. ISBN 8871152999. OCLC 48824470.CS1 maint: others (link)

External links

Image of an alethoscope advertisement

Precursors of film
Alethoscope Anorthoscope Camera obscura Chronophotography Electrotachyscope Flip book Kaiserpanorama Kinematoscope Kinetoscope Magic lantern Megalethoscope Mutoscope Peep show Phantasmagoria Phenakistiscope Praxinoscope Shadow play Stereoscope Thaumatrope Théâtre Optique Zoetrope Zograscope Zoopraxiscope

Photography
Terminology	35 mm equivalent focal length Angle of view Aperture Black and white Chromatic aberration Circle of confusion Color balance Color temperature Depth of field Depth of focus Exposure Exposure compensation Exposure value Zebra patterning F-number Film format Large Medium Film speed Focal length Guide number Hyperfocal distance Metering mode Orb (optics) Perspective distortion Photograph Photographic printing Photographic processes Reciprocity Red-eye effect Science of photography Shutter speed Sync Zone System
Genres	Abstract Aerial Aircraft Architectural Astrophotography Banquet Conceptual Conservation Cloudscape Documentary Ethnographic Erotic Fashion Fine-art Fire Forensic Glamour High-speed Landscape Lomography Nature Neues Sehen Nude Photojournalism Pornography Portrait Post-mortem Selfie Social documentary Sports Still life Stock Street Vernacular Underwater Wedding Wildlife
Techniques	Afocal Bokeh Brenizer Burst mode Contre-jour Cyanotype ETTR Fill flash Fireworks Harris shutter HDRI High-speed Holography Infrared Intentional camera movement Kirlian Kite aerial Long-exposure Macro Mordançage Multiple exposure Night Panning Panoramic Photogram Print toning Redscale Rephotography Rollout Scanography Schlieren photography Sabattier effect Slow motion Stereoscopy Stopping down Strip Slit-scan Sun printing Tilt–shift Miniature faking Time-lapse Ultraviolet Vignetting Xerography
Composition	Diagonal method Framing Headroom Lead room Rule of thirds Simplicity Golden triangle (composition)
Equipment	Camera light-field field instant pinhole press rangefinder SLR still TLR toy view Darkroom enlarger safelight Film base format holder stock available films discontinued films Filter Flash beauty dish cucoloris gobo hood hot shoe monolight Reflector snoot Softbox 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-SLR comparison MILC camera back Digiscoping Digital versus film photography Film scanner Image sensor CMOS APS CCD Three-CCD camera Foveon X3 sensor Image sharing Pixel
Color photography	Color Print film Chromogenic print Reversal film 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 Instant film K-14 process Print permanence Push processing Stop bath
Lists	Most expensive photographs Photographers Norwegian Polish street women
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