Mamiya medium format standard lens with built-in leaf shutter for full flash sync.
The Mamiya Sekor N/L A 150mm f/3.8 is a standard lens with leaf shutter for a Mamiya medium format system, providing a normal perspective with the flash sync advantage of a built-in shutter. The 150mm is approximately standard on 6x7 or slightly telephoto on 645 depending on the mount variant.
Optical quality is good with the Sekor multi-coating delivering sharp, contrasty images suited to portrait and general photography. The f/3.8 aperture provides adequate speed. The built-in leaf shutter enables flash synchronisation at all speeds, critical for studio and location work with flash.
Build quality follows Mamiya's professional standards with solid metal construction and reliable mechanical operation. The leaf shutter mechanism adds complexity but provides the essential flash sync capability that professional portrait and commercial work demands.
On the used market, the Sekor 150mm f/3.8 with leaf shutter offers medium format standard lens capability with flash sync advantage at modest prices. For Mamiya system users needing reliable flash sync across all speeds, it provides an essential studio and location tool.