Summary: This lens is the only reason to go with A-mount! The bokeh is extremely creamy and smooth. I guess they used 'smooth' in the name for a reason. It does take some practice to get the best out of the lens and the bokeh is best when used at 2.8 (4.5 effect) but when all the ducks are in a row and you've nailed the shot, you could find yourself staring at the photo all day long :-) I wouldn't have been able to use the lens without focus peaking function in a camera body.
Excerpt: On my A850: Sharpness: Sony 135mm STF is sharper and with better contrast than my Minolta 135mm AF f/2.8 and Minolta 80-200 f/2.8 APO when it is accurately focused. Only my Sony 135mm f/1.8 gives higher resolution than the Sony 135mm STF. Bokeh: Sony 135mm STF show much smoother bokeh than the Sony 135mm f/1.8 when the subject has a closed and busy backgound.
Pros: Durable, Nice Bokeh, Rugged, Strong Construction
Excerpt: This lens is truly one-of-a-kind! I use this for portraits and nature (wildflowers, blossoms, etc). It's 135mm range is made for full frame on my a850, but it is just as suitable on my a700. The bokeh that is produced is creamy and delightful creating unique perspectives. The manual focus characterisitcs of the lens allow you to get the focus perspective you desire and the lens is real sharp on the in-focus subjects.
Summary: I had been reading about this lens for years, I just had to have it! If you have read the articles and seen the pictures posted all over the place, you either know you want this lens, or you don't. If you do (and you know who you are), it is everything you dreamed it was. There is simply no lens ever made that is better for pretty flower pictures and bright light still portraits. But let's be honest-- this is a difficult lens to use. It needs a lot of light.
Summary: Excellent prime lens, perfect circular and creamy bokeh, sharp, great image quality. All metal body and crystal glasses. It is a little heavy but you can feel the quality. Is a very specialized and unique lens, only manual focus but you can use the Peaking Level and Focus Magnifier functions to make focus easy; check your Alpha camera handbook. If you are a only "auto-focus" person this great lens is not for you.
Summary: It will be an understatement to say that this lens produces an impressively smooth bokeh. Be it foreground or background, this lens does the job, and so well that there is no other lens I’m aware of to match it from any brand. And while this is the king of bokeh, it is worth pointing out that it is also one of the sharpest lenses around and that involves a corner to corner sharpness.
Great, Underappreciated Lens But Not for Casual Photographers
12 March 2012
Summary: Sony 135mm/f2.8[T4/5] is one of the great but underappreciated lenses in the market. Part of that may be due to Sony's lack of marketing initiatives and a part of it the price tag. But, to a greater part, it may also be usability challenges as this is not a lens for the casual photographer (see below). Build Quality: Superb.
Excerpt: For Product Photography, Portrait and still life this lens is amazingly sharp and has THE BEST Bokeh EVER. Use it with Full frame or 35mm Film and you'll treat yourself with one of a kind lens. some how Easy to focus on a 35mm film due to the bright viewfinder. However, No focus confirmation of any kind!! I found this is the only problem with it. But doesn't bother me.
Pros: Durable, Nice Bokeh, Sharp, Strong Construction
Excerpt: If you like bokeh this is the lens for you the down side is its not as useful (no autofocus)as the CZ135mm if you can afford only one high end 135mm prime the CZ135mm maybe the way to go. The build quality is excellent, a lens that will last forever if not abused. This is the bokeh lens that is unparalled by any lens by any brand. Its in a class by its self. If bokeh is something you care about its THE lens to have.