Olympus OM Zuiko Auto-Macro 50mm f/3.5 vs Tamron 28mm f/2.5 Adaptall-2

Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.

Olympus

OM Zuiko Auto-Macro 50mm f/3.5

Tamron

28mm f/2.5 Adaptall-2

Verdict at a glance

Tamron 28mm f/2.5 Adaptall-2 is faster by 1 stop (f/2.5 vs f/3.5), letting in more light.
Tamron 28mm f/2.5 Adaptall-2 is lighter by 20g.
Tamron 28mm f/2.5 Adaptall-2 goes wider (28mm vs 50mm).
Olympus OM Zuiko Auto-Macro 50mm f/3.5 reaches further (50mm vs 28mm).

Specification comparison
Spec	OM Zuiko Auto-Macro 50mm f/3.5	28mm f/2.5 Adaptall-2
Brand	Olympus	Tamron
Mount	Olympus OM	Olympus OM
Type	Macro	Prime
Focal length	50mm	28mm (wider)
Max aperture	f/3.5	f/2.5 (faster)
Released	n/a	1979
Format	full-frame	full-frame
Groups	4	7
Af motor	none	none
Elements	5	7
Weight g	200	180 (lighter)
Filter mm	49	49
Length mm	40.0	37.5
Diameter mm	60.0	64.5
Min focus m	0.23 (closer focusing)	0.25

Olympus OM Zuiko Auto-Macro 50mm f/3.5

A 50mm macro lens from the OM line that focuses down to 0.23 m, giving half life-size natively.

Pros

Sharp flat field
Close focus 0.23 m
Compact
Reaches 1:1 with an extension tube

Cons

Manual focus only
f/3.5 is dim
Needs a tube for 1:1

Tamron 28mm f/2.5 Adaptall-2

A 28mm f/2.5 manual-focus wide-angle prime lens, the Tamron 28mm f/2.5 Adaptall-2 is designed for Olympus OM mount bodies. The wide view suits landscapes, architecture and environmental shots.

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