The Sony 10-18mm or SEL1018 is a fairly large high quality zoom lens for the Sony NEX E mount system. The lens is a constant F/4.0 throughout the zoom range. The lens ships with caps, a petal shaped hood, box and a one year warranty in most juristrictions. It is compatible with all Sony NEX Cameras.
The lens specifications are as follows:
Lens Type : E-mount 10-18mm F4
Lens Mount Type : Sony E-mount
Aperture : f/4- F/22
Focal Length (35mm equivalent) : 15-27 mm
Lens Construction : 8-10
Minimum Focus Distance : 9.84″ (0.25m)
Angle of View : 109°-76° (APS-C)
Aperture Blade : 7 blades (Circular aperture)
Dimensions (Max. Diameter x Length) : 2-7/8 x 2-1/2″ (70.0 x 63.5 mm)
Distance Encoder : Yes
The lens has a threaded filter diameter of 62 mm. We tested the lens with a 6mm B+W MRC Circular Polarizer with no vignetting evident at the 10mm setting.
Sony’s reported weight is 8oz (225g), I am going to assume that this number is without caps, hood, etc… My scale shows this, and I call this bag weight:
We tested this lens on a NEX5n and the results were very very good. I think that it will be even better on the NEX6! This is a small, light zoom that covers the 35-70mm range for full frame. On a NEX crop it becomes 53-100mm equivalent. This lens demonstrates little lateral chromatic abberations, little fall off, and excellent colour contrast. You can expect the famous contax “look” and sharpness. Critical to any adapted lens is the adapter. We used a Kipon type adapter that allows the lens to reach infinity focus at the correct point.
I am working on the review of this wonderful lens, that is sadly discontinued by Leica. It is a very light small lens ideally suited for travel. The nearest modern alternative would be the 90mm F/2.8 Summarit. The F/2.8 Elmarit is available on EBay and if one is careful, you can pick up a very good copy.
This is the last version prior to the Summilux Asph. Designed by Peter Karbe, it sort of transitions between ealier Mandler designs and the current Asph, which is also designed by Mr. Karbe.
It is a 7 element, 5 grouping design with a 12 blade aperture mechanism. This mechanism yields almost perfectly circular bokeh throughout the aperture range. You can expect half click stops between the aperture settings.
A superb small lens for the M system! This lens has drawn a fair amount of criticism from Leica shooters. It has been branded as having poor mechanical parts and being optically inferior.
Are these accusations true? We will find out! First let have a look at the specifications as from Leica: