杭州海关查到照相机镜头核辐射超标,遇到这54种镜头要小心!

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What!?


国外买老相机被海关查了?



没错

前两天就有被查扣的

而且

几年前也有被查的

什么情况??



先来插播两条新闻


▶ 2月11日,杭州海关隶属钱江海关关员在杭州邮路口岸查验时,从一批进境邮包中查获核辐射有害因子超标的宾得古董胶卷相机1台、镜头2个。这也是杭州海关首次在邮路口岸截获核辐射有害因子超标相机及镜头。



▶3月23日,乘坐泰国航空公司TG612航班的一名泰国籍男性旅客,在入境检测时其随身携带物品放射性超标报警。经现场检验检疫人员排查,发现是其照相机镜头放射性超标,但剂量没有超过国家质检总局规定的上报标准。经询问,该相机镜头是这位旅客于2010年底在中国香港购买的二手货。

@云中-漫步 摄(图文无关)


镜头也有辐射?

没错

以往的高端老镜头

一般会采用稀土玻璃生产


@午万 摄(图文无关)

这类镜头

也会被叫做

辐射镜头



“辐射镜头”指的是一些采用了稀土镜片的胶片时代老镜头,因为画质、色彩很有特色,价格又不高,可以转接到微单或现在的数码单反上使用而受关注。在生产制造和镀膜技术都不发达的胶片时代,稀土镜片的角色可能近似今天的“ED镜片”,能改善透光、纠正畸变、改善画质、强化色彩,不过由于成本问题,一般只有高端货才会配备,而且还会释放核辐射,宾得Takumar、柯达、佳能等厂商都曾经做过这类产品。

感觉

你紧张了

想知道在你“军械库”里的某个角落里

会不会有个辐射镜头

躺在那边

biu biu biu

向你发射

电离辐射


不过不用担心

现代工艺镀膜的镜头

不含稀土


那么什么镜头有辐射,为什么有辐射呢?

在上世纪四十至七十年代,不少镜头都采用了「氧化钍」(thorium oxide) 作为镜片的组成材料(占重量30%),这物质类似于氟化钙(萤石),具有高折射率和低色散性质,能够有效减少色差及用减少镜片曲率,而且造价也便宜。随着微单的兴起,不少老镜头可以转接到微单相机上,这一类镜头又开始活跃起来。


摄影百科网站罗列了54款

经过测试具有辐射的镜头

列表如下



Kodak Ektar 101mm f/4.5 (Miniature Crown Graphic camera) lens mfg. 1946

Kodak Ektar 38mm f/2.8 (Kodak Instamatic 814 camera) lens mfg 1968-1970

Kodak Ektanar 50mm f/2.8 (Kodak Signet 80 camera) lens mfg. 1958-1962 (3 examples)

Kodak Ektanar 90mm f/4 (Kodak Signet 80 camera) lens mfg. 1958-1962

Kodak Ektanar, 44mm f/2.8 (Kodak Signet 30, Kodak Signet 50, Kodak Automatic 35/Motormatic 35 cameras) lenses mfg. 1959-1969

Kodak Ektanon 50mm f/3.9 (Kodak Bantam RF camera) lens mfg. 1954-1957

Kodak Ektanon 46mm f/3.5 (Kodak Signet 40 camera) lens mfg. 1956-1959

Kodak Anastar 44mm f/3.5 (Kodak Pony IV camera)

Kodak Color Printing Ektar 96mm f/4.5 lens mfg. 1963

Argus Cintagon 50mm f/2.8

Bell & Howell Director Series (Model 1208?) XL Super 8 movie camera; Zoom Lens f: 1.2 \ F: 9-22.5 mm

Canon FL 50/1.4 Up to 770 cpm at the rear lens. (very early version)

Canon FL 50/1.8 I : Up to 450 cpm / 26 µSv/h at the back lens, up to 7 cpm / 0.4 µSv/h behind camera or at the lens barrel. (early version with graphic hyperfocal distance scale)

Canon FL 58/1.2 : Up to 180 cpm / 10 µSv/h at the back lens, up to 30 cpm / 1.7 µSv/h behind camera or at the lens barrel.

Canon FD 17mm f/4

Canon FD 35mm f/2.0 (versions from the early 1970’s – concave front element)

Canon FD 55mm f/1.2 S.S.C. Aspherical (Measured at 46532 CPM @ front element; S.S.C non-Aspherical is not radioactive)

Canon (SUPER-CANOMATIC LENS) R 50mm 1:1.8 No.78xxx

Carl Zeiss Jena Pancolar 55mm f1.4

Carl Zeiss Jena Pancolar 50mm f1.8 “Zebra” (1964-67, up to serial number 8552600)

Carl Zeiss Jena Biometar 80mm f2.8 “Zebra” “(Only P6 mount version )

Carl Zeiss Jena Flektogon 50mm f4 “Zebra” “(Only P6 mount version )

Carl Zeiss Jena Flektogon 35mm f2.8 (source?)

Carl Zeiss Jena Prakticar 50mm f1.4 (1st version with engravings around the outer side of barrel)

Carl Zeiss Tessar 80mm f/2.8 (old silver Hasselblad version

Enna München Lithagon 1:3.5 35mm (M42)

Focal (Kmart store brand) 35mm f/2.8

Fujica Fujinon 19mm f/3.5 EBC

Fujica Fujinon 35mm f/1.9 EBC

Fujica Fujinon 50mm f/1.4 non-EBC early style

Fujica Fujinon 50mm f/1.4 EBC early style

Fujica Fujinon 100mm f/2.8 EBC

Fujica Fujinon 400mm f/4.5 EBC

Fujica Fujinon 600mm f/5.6 EBC

GAF Anscomatic 38mm f/2.8 (GAF Anscomatic 726 camera)

Industar 61 L/Z MC is NOT radioactive, as the myth says (L is for Lanthanum. Only 0,089 % of total naturally found Lanthanum (La-138) isotope is radioactive, and even it has half-life of 105 billion years).

Kodak Aero-Ektars (various models)

Kodak Ektanon 4-inch Projection Lens f/3.5

Kodak Instamatic M24/26 Super 8 Camera

Kodak Ektar 80mm f/2.8 (for Hasselblad 1600F and 1000F, made 1948-1950)

Kodak Ektar 135mm f/3.5 (for Hasselblad 1600F and 1000F, made 1949)

Konica Hexanon AR 50mm f1.4 (smallest aperture 16; green AE marking)

Konica Hexanon 57mm f1.2

Konica Hexanon 21mm f4 SN 7029XXX, primarily thorium and thorium decay products

Leica 50mm f/2 Collapsible Summicron

Mamiya/Sekor 55mm f/1.4 (m42, chrome+black, flat rear element)

Mamiya/Sekor SX 55mm f/1.8 6,8 µSV/h

Mitakon (Zhongyi) 50mm f0.95 Ver I Speedmaster (4 Lanthanum optic elements)

Mitakon (Zhongyi) 50mm f0.95 Ver II Dark Knight(1 Lanthanum optic element)

Nikkor 35mm f/1.4 (early variant with thorium glass elements)

Olympus Zuiko MC Macro 20mm f/3.5

Olympus Zuiko Auto-S 1:1,2/55 mm (first version with thorium glass elements)

Olympus Zuiko Auto-S 1:1,4/50 mm (only first version “Silvernose” is Radioactive)

Olympus Zuiko Pen F 1:1.4/40mm (rear element)

Porst Color Reflex MC Auto 1:1.2/55mm (only a specific version? another copy reported as non-radioactive)

Rikenon AUTO 55mm f/1.4 (22937 CPM rear element)

SMC Takumar 20mm f/4.5

SMC Takumar 35mm f/2.0 (Asahi Optical Co.)

Super Takumar 35mm f/2.0 (Asahi Optical Co.)

SMC Takumar 50mm f/1.4 (Asahi Optical Co.)

Super Takumar 50mm f/1.4 (only the latest version with 7 elements)

SMC Macro Takumar 50mm f/4.0

Super Takumar 55mm f/1.8 (Asahi Optical Co.)

SMC Takumar 55mm f/1.8 (Asahi Optical Co.)

Super Takumar 55mm f/2.0 (Asahi Optical Co.)

SMC Takumar 55mm f/2.0 (Asahi Optical Co.)

SMC Takumar 85mm f/1.8 (Asahi Optical Co.)

Super Takumar 6×7 105mm f2.4 (Asahi Optical Co.)

Steinheil Auto-Quinon 55mm f/1.9 KE mount

Tele-Takumar 6.3 300mm (Asahi Optical Co.)

Topcor RE GN 50/1.4

Topcor UV 50mm f/2

Yashinon-DS 50mm f1.4 (Yashica) (Measured at 680 nSv/h)

Yashinon-DS 50mm f1.7 (Yashica) (Measured at 762 nSv/h)

Yashinon-DX 50mm f/1.4  (Yashica) (Measured at 1359 nSv/h)

Yashinon-DX 50mm f/1.8 (Yashica)

Yashinon-DS-M 50mm f/1.4 (Yashica) (Measured at 572 nSv/h)

Yashinon-DS-M 50mm f/1.7 (Yashica) (Measured at 798 nSv/h)

Yashinon-DS-M 55mm f/1.2 (Yashica) (Measured at 1056 nSv/h)

Yashinon-ML 50mm f/1.7 (Yashica)  (likely only the older design with ‘YASHICA LENS ML 50mm 1:1.7 YASHICA MADE IN JAPAN’ writings is radioactive)

Yashinon 55mm f1.2 (Tomioka) (also branded as Cosinon, Chinon, Tominon, Tomioka or Revuenon; Measured at 981 nSv/h)

Leitz Wetzlar Summicron 5cm f2 (M39)

Vivitar Series 1 28mm f1.9

Voigtlander 50mm Nokton Prominent

Wollensak Raptar 28-75mm f2.3

Zenitar-M 50mm f1.7 (Lanthanum glass)

来源:http://camerapedia.wikia.com/w...




怎样才能知道自己手头上的镜头含有 “钍” 元素?如果在镜头玻璃片上看到微黄色的痕迹,那么这款镜头就含有“钍” 元素。“钍”元素通常是用来提高图像质量的,但缺点为随着时间的推移,它会变成微黄色。

目前在摄影圈里,对这些辐射镜头的看法也不一致,有些人认为这些辐射并不会对身体造成伤害,有些人认为只要是辐射超标总会有问题出现,特别是相机目镜如果使用辐射超标的镜头确实会对眼睛造成影响。

不管争论如何

想要拍出好照片的心情大家都理解

但为了自身安全

请不要购买非正规渠道的产品

说不定真会对自己或家人的身体

造成伤害



@助理的日常 摄(图文无关)

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