The Zenzanon PE 200mm f/4.5 offers real telephoto effect, pulls in distant subjects and can give soft background effects. This lens is fully corrected for chromatic aberration and gives sharp depiction and superior contrast. Zenzanon PE interchangeable lenses were all developed specifically for the ETR series cameras, employing computer-aided optical design and multi-coating technology. ETR lenses are equipped with a shutter that opens and closes at a signal from the camera body. Shutter speeds are available from 1/500th of a second to 8 seconds. ETR lenses must be mounted with the shutter cocked.