The Mamiya-Sekor Zoom ULD 105-210mm F4.5 lens offers a very practical zoom range for 6X45 Manual Focus, Mamiya, Medium Format cameras.
In 35mm / full frame camera equivalent terms, it would compare to a 75-150mm F3.5, however, the quality of this lens is similar to that of a prime lens.
The low price of this lens does not reflect its professional capabilities, providing sharp landscapes that can be enlarged up to 8 feet.
I’ve used this lens for close-ups, landscapes, sunsets, sunrises, travel and many other photography applications with the Mamiya 645 Junior, Mamiya 645 1000 Pro S, and the Mamiya 645e cameras.
If you have one of these Mamiya 645 lenses, I highly recommend this lens, especially since it is one of the most undervalued medium format lenses.