Olympus ZUIKO ED 7-14mm f/ 4 (used)

Condition: Used, still in excellent working condition

warranty: 6 months

Included: front and back cover

owners could be in for a treat with this super wide-angle lens. Even when the 2x CCD factor are taken into account we have a lens that is an ultra-wide 14mm focal length, making it potentially an ideal choice for landscapes and architectural photography.

Specification

• Lens Name: Olympus Zuiko Digital ED 7-14mm f/4
• Focal range: 7-14mm (14-28mm equiv on 35mm/full frame)
• Optical Construction: 18-12 elements/groups
• Max Aperture: f/4
• Min Aperture: f/22
• Closest focus: 0.10m
• Filter Thread: n/a
• Dimensions: 119.5x86.5mm
• Weight: 0.78kg
• Price (SRP) £1180

Build and handling
The lens is a standard twin ring zoom that is a little bulky and has a fixed hood protecting a bulbous front element. Because of this, no filter thread is provided and no alternative offered. However, that is pretty much where the bad news stops.

Olympus provide a soft pouch to store the lens in and the construction is solid with nicely torqued rings that feel smooth and quick and fairly quiet auto focussing. Manual focus too, is nicely torqued and the full change in focal lengths is achieved with just less than a quarter turn.

Olympus claim dust and splash-proof construction for this Pro-spec lens, although this remained untested!

Optical quality
The control of distortions throughout the focal length of this constant aperture lens is quite good, sticking to mild pincushion throughout the range. Measured with Imatest it comes out below 1% throughout where a level of 1.5% is deemed acceptable.

Resolution is consistent across the full width of the frame, except when the optic is used wide open, where a few differences creep in towards the edge of the frame. That resolution is good enough for all the present 4/3rds cameras and still has a fair amount in reserve.

Contrast, by no means bad, lacks slightly when the camera is shooting RAW files but the camera, in this case an E-500, compensates well when shooting Jpegs.

By using two super ED elements and two ED elements in the construction, the lens copes well with chromatic aberrations or fringing, and no incidents visible to the naked eye show up. Measurements show the phenomenon to be kept below a single pixel. Multi coatings have come a long way in recent years, helping to overcome incidents of flare and ghosting and this optic benefits from these advances.

Click on each comparision photo below to view full size versions

	Left: At 7mm and f/5.6 the lens is capable of some dramatic shots Below, left: Even wide open at f/4 the lens delivers amazing depth-of-field. Below, right: This time at 14mm and f/4 gives an idea of what the long end is like. All three Church images were shot from the same position.

7-14mm set at 7mm and f/8	7-14mm set at 14mm and f/8
7-14mm set at 7mm and f/4	7-14mm s