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Spotting scope eyepieces are usually interchangeable to adapt for different magnifications, or may have variable zoom to give a range of magnifications. Magnifications less than 20× are unusual, as are magnifications more than 60× since the latter can lead to poorer image brightness, a narrow field of view and too much image shaking, even on ...
The M49 Spotting Scope, also known as the M49 Observation Telescope, [1] is a multipurpose scope system used primarily for long range marksmanship observation. It can also be used for observing the effects of artillery fires, wind direction, [ 2 ] and other general purposes.
A vintage 1970s "orange tube" Celestron C8 telescope. Celestron was the first large scale commercial manufacturer of the Schmidt-Cassegrain telescope, introducing its "C8" 8" diameter 2032 mm focal length, ƒ10 telescope in 1970. [7]
By the end of the 1970s, artists Đinh Thìn and Ngo Nam modernized the sáo by making this 6-finger-hole flute into 10-finger-hole flute, extending its register. [1] Examples of the difference between the two variations of the flute can be heard in Đinh Thìn's "Tiếng gọi mùa xuân" and Mão Mèo's performance of "tình xưa nghĩa cũ".
The portmanteau term "digiscoping" (= digital camera + telescoping) was coined in 1999 by French birdwatcher Alain Fossé.Less notable neologisms for this activity are digiscope birding, digiscopy birding, digi-birding, digibinning (using digital camera with binoculars), and phonescoping [3] (using a digital camera phone with a spotting scope or binoculars).
The third book of Đại Việt sử ký toàn thư (Complete Annals of Dai Viet), [27] [28] published in editions between 1272 and 1697, has the following to say about the Trưng Sisters: In the year Kỉ Hợi [ Ji Hai , 39 AD] (It was the 15th year of the era of Emperor Guang Wu of Han, Liu Xiu), the administrator of Jiaozhi, Su Ding ...
A man playing the đàn tranh beside the singer. The đàn tranh (Vietnamese: [ɗâːn ʈajŋ̟], 彈 箏) or đàn thập lục [1] is a plucked zither of Vietnam, based on the Chinese guzheng, from which are also derived the Japanese koto, the Korean gayageum and ajaeng, the Mongolian yatga, the Sundanese kacapi and the Kazakh jetigen.
Bích Động is a temple complex, built in 1428. [6] It is situated on nearby Ngũ Nhạc Mountain, and consists of three separate temples: Hạ, Trung, and Thượng Temples, in ascending order. Guided tours generally cover historical points and end with a view from the top.