OnlineReviews:
Inexpensive standard zoom lens from the early 1980s, which was sold under many different names including multiple store brands.
This lens was made with a Pentax K mount:
One-touch zoom
Diaphragm: 6 blades
Focal range: 28-80mm
Max aperture: F3.5-4.5
Min aperture: F16
MFD: 2 m
Macro: max 1:5 at the 80 mm position (MFD of 63 cm)
Filter size: 62 mm
Weight: 430 g
Mount Type: Pentax K
This lens is very sharp when stopped down to its "soft spot" of 5.6 and it produces very nice colors and an almost picture-like bokeh, useable macro mode
It predates the plastic-fantastic era of budget products, so the lens is very solid and well constructed.
The lens incorporates a macro mode at the 80mm position, cutting the MFD from 2 meters to 63 centimetres and also locking the barrel, which was most welcome. It is engaged by lining up an arrow at 80mm, then pushing up on the focus/zoom ring.
F4.5 for close-up shots of flowers was spot on. Much to my surprise, this unassuming old lens can actually produce an almost painting-like bokeh under good circumstances! I was very pleased with the color reproduction as well. The only adjustments needed was some contrast, generally speaking.
This late 1970s is one of the better zooms of the period and worth picking up. I’m glad I did because that bokeh was a very pleasant discovery!