Check out this link on UV filters. After a blurb on UV light and its effects, they test the best and score them according to UV ray reduction. One thing that they don’t test is durability… UV Filter Test

This is a superb lens! You can expect extraordinary sharpness right from wide open. Smooth Bokeh and no, and I say again, no chromatic aberrations. The lens distinguishes itself by having excellent separation of the subject from the background, it’s very 3D. Colour contrast is high and images need very little processing when coming from dng files. The lens has a very special look, especially at mid-distances. Close up performance is also very good, due to the floating element. Close up images still retain interesting bokeh as well. Check out the parrot shot below. Vignetting also serves to enhance image quality ( I know that some will disagree), but I really like this lens and its output.

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.

We have been busy adding new images to the stock inventory! Here is a sample of our portfolio:

Sequoia National Park

A great lens, not quite as good as the new Leica 18mm, but much, much cheaper. This test was done on a Sony NEX 5n, so it will not represent true corner performance on a full frame. You can get an ides of the lenses characteristics though. The lens itself is tiny, it weighs 350g and is 71mm long. Distortion is well controlled, you can expect some lateral chromatic aberration in the corners, but it is easily corrected. Specs: