Olympus Olympus 70-150mm f4 Heritage

Overview

The Olympus OM-System Zuiko 70-150mm f4 was a compact telephoto zoom offered for Olympus's OM manual-focus SLR system. The reviews that touch on this specific lens describe it as a vintage telephoto zoom that has since been adapted onto modern mirrorless bodies (as discussed in a mu-43 thread on 'Olympus OM 75-150 4.0 Adapted Vintage'). Community discussion notes that many surviving examples suffer from age-related issues such as haze, fungus, and separation of the cemented (compound) elements, yet users still report producing 'a lot of great images' with it. It has earned a modest following for two kinds of work in particular: portraits, where its lower contrast and precise framing suit the subject, and impressionist, painterly-style photography. No established nickname or jargon term for this lens is evidenced in the reviews, so none is claimed here.

Verdict: The Olympus OM 70-150mm f4 is a vintage compact telephoto zoom best suited to portrait shooters and photographers chasing a soft, painterly, lower-contrast look. It rewards those who stop down to f8 for sharpness and colour, and who use it wide open for flattering portrait bokeh. Buyers must accept that many examples suffer from haze, fungus, and element separation, so careful inspection is essential.

Optical Character

Bokeh

Good bokeh, particularly around 135mm at f4, though it can double or triple out-of-focus branches like most telephoto zooms.

Color

Colourful when stopped down to around f8; otherwise unknown.

Sharpness wide open

Softer and lower in contrast wide open, becoming sharp and contrasty when stopped down to around f8.

Contrast

Lower contrast wide open, becoming noticeably more contrasty when stopped down to about f8.

Community Insights

What people love

Good bokeh for portraiture, especially around 135mm at f4
Lower contrast that flatters portrait subjects and enables an impressionist, painterly look
Becomes sharp, contrasty, and colourful when stopped down to about f8
Capable of producing many great images despite its age, as reported by long-term owners

What people dislike

Many surviving samples show haze
Fungus is commonly found in used examples
Separation of the cemented/compound elements is a frequent age-related problem
Relatively soft and low in contrast wide open

Pro Tips

Stop down to around f8 for sharp, contrasty, and colourful results
Shoot wide open near 135mm at f4 for pleasing portrait bokeh and flattering lower contrast
Lean into its lower-contrast character for impressionist, painterly-style photography
Inspect thoroughly for haze, fungus, and element separation before buying, as these are common on this vintage lens

Sources (1)

Web-grounded synthesissecondary

The Olympus OM-System Zuiko 70-150mm f4 was a compact telephoto zoom offered for Olympus's OM manual-focus SLR system. The reviews that touch on this specific lens describe it as a vintage telephoto zoom that has since been adapted onto modern mirrorless bodies (as discussed in a mu-43 thread on 'Olympus OM 75-150 4.0 Adapted Vintage'). Community discussion notes that many surviving examples suffer from age-related issues such as haze, fungus, and separation of the cemented (compound) elements, yet users still report producing 'a lot of great images' with it. It has earned a modest following for two kinds of work in particular: portraits, where its lower contrast and precise framing suit the subject, and impressionist, painterly-style photography. No established nickname or jargon term for this lens is evidenced in the reviews, so none is claimed here.

https://www.dpreview.com/forums/post/59254227https://www.mu-43.com/threads/olympus-om-75-150-4-0-adapted-vintage.105621/