特熙纳（Tessina）是瑞士制造的高品质全金属，全机械，无电池的双镜头反光微型相机，由格伦兴市（Grenchen）西格里斯特公司（Siegrist） 从1957年开始制造、由卢加诺康卡瓦公司（Concava）发行。特熙纳的设计者鲁道夫·施泰呢克博士（Dr. Rudolf Steineck），也是著名ABC Steineck手表照相机的设计人。特熙纳有二百余件精密零件组成，和瑞士手表一样，也有红宝石轴承减少机器的磨损，经久耐用，可拍摄十万张照片。特熙纳照相机于2005年停产。前后共出三种型号: Tessina automatic 35mm，Tessina 35， Tessina L。总产量约三万多部，大部分由纽约卡尔·海茨（Karl Heitz）代理，入口美国。

The Tessina (officially created by Arnold Siegrist) is a high-quality 35 mm camera patented by Austrian chemical engineer Dr. Rudolph Steineck in Lugano Switzerland, manufactured by Siegrist in Grenchen Switzerland. It was introduced in 1957 and distributed by Steineck's company Concava S.A and remained in production up to 1996. The Tessina takes 14x21 mm pictures on standard 35 mm film (loaded into a special cassette), making it one of the few subminiature cameras to use the format. It is a very small (2.5x2x1 inch) twin lens reflex, with two 25 mm f/2.8 Tessinon lenses, one for taking the picture, the other for viewing on a tiny ground-glass focusing screen on top of the camera. A 45° mirror is employed to bend incoming light onto the film, which lies along the bottom of the camera rather than the back to save space. Apertures are continuously variable down to f/22, and shutter speeds range from 1/2 to 1/500, and B. The Tessina 35, Tessina L can focus down to 9 inches, Tessina Automatic 35mm to 12 inches. The film is advanced via a clockwork master spring built into the takeup spool, with a pullout winder like the crown on a wristwatch. Each winding can last up to 8 exposures.