Summary: Got this in one day but used 2nd day shipping! Now about the lens. I am extremely pleased with the sharpness and clarity in macro and portrait mode. In macro mode mounted on my Sony A65 I was able to zoom in on a ruler and found the maximum magnification represented about 23mm along the longest dimension of the image meaning that objects that are slightly less than one inch will fill the entire width of a landscape oriented photo on the Sony A65 camera.
Summary: This lens produces very sharp images regardless if you're in macro or limiter mode. It also doubles up great as a portrait lens if you're on a crop sensor camera (bringing you up to 75mm). It's built quite well, feels solid in the hand, and isn't too heavy or light. It produces creamy smooth bokeh which makes portrait shots stand out wonderfully. Like stated above, the macro shots are amazingly sharp as well!
Pros: Pretty much everything you'd expect from the lens
Summary: I've been using this lens to photograph details from silver and porcelain for sale on Ebay. The tiniest silver marks and porcelain makers marks are exceptionally clear and can be magnified for easy viewing.
Summary: This is a great little macro lens - not too expensive, considering the image quality. Images are very sharp, once you get the hang of focusing on very close objects. Manual focus works well on the A300 with its live view. Autofocus is good too, with enough light. At wider aperture a good bit of a single flower or object may be out of the focal plane and it's better to pick your own focus point. Also works well for outdoor and portrait shooting.
Summary: The Sony 50mm f/2.8 Macro lens is one of the best lenses you will ever put in your camera's mount. I will provide the pros and cons of this lens along with my experience with it. What most people want to know right now is whether this lens is sharp, it is. You could cut cheese bars with how sharp it is. The fast aperture of f/2.8 allows you to use aperture to isolate your subject from the background or use it when you work under low light. It closes down to f/32.
Summary: With the exception of Carl-Zeiss and G grade lenses, the alpha macro and super fast prime lenses are probably the most expensive lenses you will find in the Sony DSLR lens lineup. Introduced into the alpha/minolta/maxxum/dynax mount system as a standard zoom macro, the SAL50M28, along with its telephoto sibling, the SAL100M28, have been around the DSLR market since 2006, since Sony's first a100 made it to the shelves of every camera store worldwide.
Summary: This is overall a great lens. It produces very sharp images and is fast enough to do handheld shots at lower ratios than 1:4 magnification. For anything 1:1 through 1:4, I'd highly recommend a tripod as shutter speeds will quickly drop. The focus throw is very long, which means that it is slow to focus in some situations and tends to hunt a lot. The front element is very recessed, so the lens almost works as if it has a built-in hood.