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M42 lens mount (redirect from Pentax Universal Screw Mount)screw is aligned with the mount. This will allow for the aperture pin to pass inside the screw slot, and not fall into it, becoming stuck. M42 mount cameras...15 KB (1,928 words) - 22:44, 31 August 2024
screwed into. The angle of the screw is measured as the aperture of the cone. Oval or raised head A decorative screw head with a countersunk bottom and...67 KB (6,313 words) - 14:32, 21 November 2024
EF-mount (without aperture control), Contax G, M42 screw mount, Konica Hexanon AR-mount, Minolta SR-mount (MC/MD), Leica M and screw mount, Nikon F-mount...8 KB (884 words) - 18:25, 9 July 2023
Objective (optics) (section Numerical aperture)at high magnification. Numerical apertures as high as 1.6 can be achieved with oil immersion. The traditional screw thread used to attach the objective...9 KB (1,132 words) - 12:01, 8 February 2024
achieves this by: Minimising mechanical complexity, removing mechanical aperture and focus drive. Shortening the flange focal distance to 18 mm compared...17 KB (1,987 words) - 14:55, 3 August 2024- Pentax cameras (section Screw mount cameras)applied manually, with no indication of aperture in the viewfinder. Can also use M42 screw-mount lenses in aperture priority (Av) with stop-down metering...53 KB (6,676 words) - 13:23, 2 November 2024
Iron sights (redirect from Aperture sight)sight inserts, and adjustable aperture mechanisms. Front aperture size is a compromise between a tight enough aperture to clearly define the aiming point...43 KB (5,689 words) - 13:09, 17 November 2024
Powerzoom-use to SDM-drive. AF – Screw drive autofocus Av – Aperture priority Av0 – Aperture priority only with open aperture M – manual exposure with exposure...25 KB (3,116 words) - 17:55, 29 December 2023
Corporation, between 1964 and 1976. All Pentax Spotmatics used the M42 screw-thread lens mount which was developed after World War II by Zeiss and Praktica...11 KB (931 words) - 00:59, 20 March 2024
Auto-Takumar lenses were a type of preset lens. The user selected an aperture then engaged a lever to energise the stopping-down mechanism. The camera...5 KB (684 words) - 05:23, 27 September 2024
entering the lens. Doing so allows the photographer to select combinations of aperture, exposure time and sensor sensitivity that would otherwise produce overexposed...15 KB (1,654 words) - 06:23, 5 November 2024
setting on the aperture dial, which gives the body control of the aperture. Other, numeric settings are used for manual aperture modes—aperture priority and...59 KB (8,606 words) - 17:11, 9 June 2024
lenses are multi-coated. Nearly all have curved aperture blades, rendering smooth backgrounds at wider aperture settings. The internal shutter in the first-generation...42 KB (2,834 words) - 10:38, 24 August 2023
Tilt–shift photography (section Aperture control)movements, with preset aperture control. The lens is available with mounts to fit cameras by various manufacturers, and also with 42 mm screw mount. The Sinar...40 KB (5,023 words) - 12:59, 9 June 2024
have an aperture priority automatic mode. The first model was the Bessa-L, introduced in 1999. This was a finderless body with a Leica screw mount, and...17 KB (1,705 words) - 11:58, 28 September 2024
Alexander Mitchell designed the first screw-pile lighthouse – his lighthouse was built on piles that were screwed into the sandy or muddy seabed. Construction...45 KB (5,060 words) - 21:21, 14 November 2024
different aperture leverage, and thus the automatic diaphragm may not work correctly on post-1961 cameras, and later MC/MD tabs may hit a screw of the front...7 KB (885 words) - 17:23, 16 July 2024
interaction between the terminal points of the diagonal lines and the implicit aperture created by the edges of the pole. This illusion occurs because a bar or...7 KB (744 words) - 20:58, 28 July 2024
214 cm focal length 16.5 cm aperture reflector with eyepieces allowing up to 1,200 magnification, and 26 Thaler for a screw-micrometer. With this, he systematically...5 KB (565 words) - 05:15, 22 September 2024
Autofocus accuracy within 1/3 of the depth of field (DOF) at the widest aperture of the lens is common in professional AF SLR cameras. Most multi-sensor...30 KB (3,884 words) - 16:26, 10 November 2024
- position at the end of arm B by means of a thumb-screw D, threaded at the end and extending through said aperture into the end of said arm, its stem d serving
- the virtual source... which can pass the entry aperture... and concentrate them into an exit aperture. This result is easily proved for rays in the meridional
- iron / rusts insisde the slip. Use double/triple sieve with decreasing aperture sizes (or deck sifters). Sieves should be magnetted to removed iron particles