Summary: I use this lens with an APS-C sensor camera which converts this lens to an effective focal length of 150mm. This allows for a comfortable distance between the subject and lens at close range at the expense of a very narrow depth of focus. The lens is sharp; however, there is noticeable diffraction distortion (loss of sharpness) at f16 and beyond. This lens is best suited for full frame cameras for which it was designed.
Excerpt: The sharpest Macro Lens I have used (compared it to my Canon 100mm F2.8L IS Macro) Surprisingly it is so small and light which is a pleasent surprise once you see the images. On the down side the Autofocus is driven by the camera body and the lens is noisy, slower to focus compared to their other F2.8 Lenses and is over priced.
Perfect for the NEX-7, one of my "short list" lenses
Christopher Knight "claud9999", Amazon
25 June 2012
Summary: This lens taught me that quality optics matters...In reviewing a landscape shot on my computer, I said to myself, "what's that spot?" Zooming in, it was a tack-sharp image of a bird in flight. The detail that comes out of my NEX-7 with this lens in front shows the true capabilities. Note that I don't usually use this lens with the SLT adapter, auto-focus is quite functional at longer distances but even with the focus limiter, I found it was not the fastest at auto-focus,...
Excerpt: For years I have been wanting a lens for close-up photography. Continually frustrated by the limits of my other cameras and lenses, I decided to invest in the SAL-100M28 Macro lens. Even though I've only begun to practice with it, I can already see results not possible with my other lenses. Because I have had it for such a short time, I cannot give an extensive review. One initial "con" was the rather "sticky" action of the focus adjustment.
Summary: Very sharp lens excellent for portraits, macro, my first specifically digital lens for my Sony Alpha 850 (have vintage minolta lenses). Only complaint is focus wanders significantly at times unpredictably so. Can use focus limiter or manual focus as work around. Not sure why this occurs but I have read it on Sony website. Given the great price though this is an obstacle well worth dealing with.
Summary: While the 50mm macro is cheaper and lighter (and sharper), the 100mm allows you to have a greater working distance between the lens and the subject, which makes lighting easier. For full 1:1 magnification, the working distance is over 6", compared to just under 2" for the 50mm lens. It is much less awkward to use, and not as invasive into the space of your subjects, which might be inclined to fly or crawl away.
Excerpt: I'm an amature photographer, and plan to use this a lot. So far the weather has prohibited me from trying it out very much, but I'm impressed with what I've tried. I can't wait to use it to its full potential.
Summary: This is my first macro lens and I love it the results are above what I imagined and I am enjoying the results, Its functions are easy and user friendly, I can only get better with this lens on my camera.