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aspect ratio, it is important not only for the operator to be able to see the boundaries of that aspect ratio, but also for the ground glass to be properly aligned in the camera so that the markings are an exact representation of the boundaries of the image recorded on film.
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Popular belief for many centuries is that ground-up glass (i.e., glass broken into tiny fragments) can kill if swallowed. In fact, this is a myth, as it is largely ineffective.
94:). In order to see the image better, a dark cloth is used to block out light, whence came the image of the old-time photographer with his head stuck under a large black cloth.
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often have a small ground-glass label area on the side. (Pencil writing on ground glass is largely inert, rub-proof and waterproof, but can be easily erased.)
86:. This projects the scene on the ground glass upside down. The photographer focuses and composes using this projected image, sometimes with the aid of a
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and the viewfinder. The ground glass usually contains precise markings to show the camera operator the boundaries of the frame or the center
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In motion-picture cameras, the ground glass is a small, usually removable piece of transparent glass that sits between the
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292:. These seeds have been used in India to kill cattle, and in homicides. Captain F. C. Briggs, adjutant to
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damage by direct sight of the lamp filament. This hides unsightly details of the lamp and fixture without
267:" concerns a jealous girl who poisons her older sister's suitor by inserting ground-up glass into cake.
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the term given by the French in India to the seeds of the
Jaquirity or Rosary Pea plant (
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Ground glass surfaces have many applications, ranging from ornamentation on windows and
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Glass flasks, stoppers, valves, funnels, and tubing are often connected together by
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The term ground-glass, as it relates to poisoning, is a corruption of
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Ground glasses commonly serve as a framing reference for a desired
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are shot full-frame and later masked during projection to a more
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Ground glass surfaces are often found on the glass equipment of
42:) finish, in which the glass is in small sharp fragments.
528:" in Camerapedia, retrieved at an unknown date under the
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on the corners to soften the edges for safer handling.
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Ground Glass focusing screens available from hopfglass
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whose surface has been ground to produce a flat but
210:surfaces that have been ground to a precise shape.
70:, a sheet of ground glass is used for the manual
280:). The seeds contain the extremely toxic lectin
431:"Bacterial toxins: a table of lethal amounts"
8:
512:Ground glass focusing with the Speed Graphic
148:is widely used as a weather- and heat-proof
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507:Ground glasses available from Panavision
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524:This article was originally based on "
374:Kruszelnicki, Karl (18 January 2007).
482:. Bristol: Peter Davies. p. 81.
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97:A ground glass is also used in the
244:are often ground on the sides and
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176:illumination without giving hard
160:. Its functions include reducing
49:to scientific uses in optics and
127:. Because most films shot with
530:GNU Free Documentation License
1:
384:. ABC Science. Archived from
447:10.1128/MMBR.46.1.86-94.1982
16:Glass with roughened surface
284:, whose toxicity is over 30
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298:Jallianwalla Bagh massacre
236:to evenly illuminate the
229:may include a ground- or
478:Swinson, Arthur (1964).
435:Microbiological Reviews
409:"A Sister's Confession"
320:Ground glass hepatocyte
172:its light, yielding a
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552:Photography equipment
480:Six Minutes to Sunset
294:General Reginald Dyer
23:Ground glass stoppers
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567:Laboratory glassware
407:de Maupassant, Guy.
376:"Ground glass kills"
330:Ground-glass opacity
202:, matching pairs of
51:laboratory glassware
350:"Pain in the Glass"
325:Ground glass joints
200:ground glass joints
114:rotary disc shutter
547:Optical components
227:optical microscope
158:incandescent bulbs
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526:Ground glass back
388:on 12 August 2021
277:Abrus precatorius
261:Guy de Maupassant
242:Microscope slides
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441:(1): 86–94.
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412:. Retrieved
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390:. Retrieved
386:the original
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357:. Retrieved
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238:field behind
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193:laboratories
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125:aspect ratio
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28:Ground glass
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562:Glass types
213:Flasks and
152:in ambient
68:photography
62:Photography
541:Categories
336:References
215:test tubes
144:Ground or
133:widescreen
208:spherical
184:Chemistry
414:5 August
392:5 August
359:5 August
304:See also
234:diffuser
190:chemical
170:blocking
154:lighting
140:Lighting
109:camera.
84:aperture
74:in some
72:focusing
465:6806598
381:Dr Karl
246:beveled
204:conical
178:shadows
166:retinal
118:reticle
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456:373212
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354:Snopes
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174:softer
101:of an
290:ricin
282:abrin
252:Abrin
162:glare
92:loupe
76:still
40:matte
36:rough
32:glass
484:ISBN
461:PMID
416:2013
394:2013
361:2013
259:The
90:(or
78:and
57:Uses
451:PMC
443:doi
225:An
206:or
107:TLR
105:or
103:SLR
66:In
30:is
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