Trinovid

{{Short description|Type of binoculars}}

{{Expand German|Trinovid|date=September 2022}}

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| caption1 = Leitz Wetzlar branded Trinovid 8×20 C folded[https://patentimages.storage.googleapis.com/f3/28/19/f7cf757910cb4f/US4087153.pdf US Patent US4087153A Binoculars with double hinge bridge and resilient biasing]

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Trinovid is the protected model designation of a roof prism binoculars series from the company Leitz (optics) (since 1986 Leica Camera) based in Wetzlar, a German centre for optics as well as an important location for the precision engineering industry.

The Trinovid binoculars were introduced in 1958 based on a patent request filed in 1953 and featured:[https://patents.google.com/patent/US3484149A/en US Patent US3484149A Center focusing prism binocular and reticle]

1. special pentaprisms (so-called Uppendahl roof prism systems that allow the construction of compact optical instruments);
2. a built-in diopter adjustment, and
3. a fully internal focusing system, that moves internal optical lenses to prevent intrusion of dust and moisture into the binocular body with centrally located adjusting means to compensate for vision differences of the two eyes.

Because of these at the time three innovations in binoculars, the binoculars series was named Trinovid.[https://www.houseofoutdoor.com/wp-content/uploads/2020/02/Leica-kijker-test-dd-29-febr-2020.pdf PROPERTIES AND PERFORMANCE OF THE NEW LEICA TRINOVID 7X35B (=HERE NAMED RETROVID) COMPARED WITH OLDER LEITZ-LEICA TRINOVIDS AND WITH BINOCULARS FROM BECK, FOTON AND THE NEW KOWA 6,5X32. February 2020 by Dr. Gijs van Ginkel]

They included both larger and smaller (compact) binoculars and were initially practically unsuitable for people who wear glasses and weatherproof, but not waterproof. The binoculars series was updated and modified several times throughout its production history and switched to Schmidt–Pechan roof prism systems around 1990, which also brought a new series onto the market. These binoculars, which have been on the market for high-quality compact binoculars for a long time, had the optical parameters 8×20 and 10×25. The "B" designation added to updated models means that there is sufficient eye relief for eyeglasses [Brille in German] wearers. The Trinovid series were supplemented in 2004 by the Ultravid series and in 2016 by the Noctivid series with higher-quality optical glass, better optical coatings and completely recalculated optical imaging qualities, but are still available as the entry-level binoculars series offered by Leica.{{Cite web |url=https://www.flickr.com/photos/binocwpg/8103359604/in/album-72157632281149716/ |title=Image of an Uppendahl prism system used in Leitz Wetzlar, Trinovid 7×42B binoculars. The first Trinovid series featuring an Uppendahl prism system was made until 1990. |date=18 October 2012 |access-date=2022-07-21 |archive-date=2022-07-21 |archive-url=https://web.archive.org/web/20220721181629/https://www.flickr.com/photos/binocwpg/8103359604/in/album-72157632281149716/ |url-status=live }}