This solid all-metal prime lens has the longest focal length in my collection today. Think it was made in the 70’s. It is super sturdy and heavy; this handsomely-built lens should easily last another 40 years or more.
I was worried that it may be too heavy for the alpha7’s E-mount adapter, but I’m glad it came with a tripod mount. It has minimum aperture of f/22 and provides adequate sharpness at wide open. I find focusing a challenge because the focusing ring is stiff. Turning the ring will shake the lens and that’s not helpful when seeing through the EVF at such long focal length.
However for the price I acquired it, the outcome makes it a real steal. Although it’s quite sensitive to stray light which causes overcast images when the lens points to bright areas, this is quite fixable by minor curves adjustment in post- processing.