Schneider-Kreuznach Tele Arton 85mm f4 Retina Mount
Most of the Retina mount lenses are slow, and have long minimum focusing distance, with the exception of the Schneider-Kreuznach Xeno 50mm f1.9 lens. The 35mm, 80mm, 85mm, 90mm, 135mm lenses are all f4.
The lenses are very small, but extremely well made and optically excellent. I have the 45mm, 50mm, 85mm, and 90mm Schneider lenses. Please check other galleries for samples.
I don't use these lenses much, but will add samples when I shoot with them.