The company was more recently mixed up in a controversy, because their night vision goggles were supplied to and used by Iran during Saddam Hoessein's reign in 1981. In 1990 they fused with Enraf-Nonius to form Delft Instruments.This Aude Delft Deltamar lense
This is a beautiful 70mm f/1.6 Oude Delft Deltamar lens, which was used in aerial photography by the Dutch 306 squadron. It is marked for NATO use only. According to my friend the lens has been taken off a TA-7M camera during operational use as part of the so-called Orpheus system.
Read this about "equivalence" aperture as I estimate this lens to be f0.95 on a 35mm camera. Click Here
It was used as aerial reconnaissance covering the time period from the end of WWII up to the introduction of digital technology. This lens was used to photograph at low altitude from F-104 Starfighters and later from F-16s. Since this is not a lens intended for private use and was commissioned by the Ministry of Defense, as such no expense was spared in its design and manufacture. Also, not many such lenses will were ever produced, so this is a rarely found lens. The lens is in reasonably good condition. But the diaphragm ring was rusty and needing sorting out. The glass is free of fungus, but it does have some dust on the rear lens element that also needed cleaning. The lens came with two matching yellow filters, one of which is in the original filter holder from Oude Delft.
This double Gauss lens consists of two back-to-back Gauss lenses (a design with a positive meniscus lens on the object side and a negative meniscus lens on the image side) making two positive meniscus lenses on the outside with two negative meniscus lenses inside them. The symmetry of the system and the splitting of the optical power into many elements reduces the optical aberrations within the system.Lens In Use
Will be completed once images have been uploaded
For images using this lens click HERE
For general information on lens design and lens elements go to the homepage HERE