I don't have the Zeiss 85mm, but I considered it at one point. I am a big Zeiss fan, at least of their older glass. However, I owned the newer ZK mount version of their 35mm and was really disappointed in that. The older Contax-Zeiss 28mm and the Zeiss Jena 135mm which I just acquired are fantastic. What I like about them more than anything is their color rendering and contrast which yields a very rich, almost 3D look. The new ZK mount 35mm (my copy at least) did not have it;
this Sirens review (for the Sony Alpha, FF) which you likely have seen seems to have a positive opinion of the Zeiss 85mm ZK. He says for example:
"Carl Zeiss Planar T* 85mm f/1.4 ZA is as close to being the perfect portrait lens as one can ever get at the moment of this writing. Every lens mount has one or multiple signature lenses, lenses that would make you remain loyal to the mount or even want to switch from an alternative one. Planar is that lens for Sony Alpha cameras. The lens has a few minor gotchas, some of which like flare and vignetting are benign or can be controlled, while others, like color fringing at wider apertures and somewhat slow AF (slow to those of us accustomed to the latest generation USM speed monsters at least), might annoy some."
The question for me was, is it worth the price? The best price I'd found was from Pop Photo who still sells them on Ebay
here, which with shipping to Australia for you (about $52) would come to $1039.
PF members who've read my other comments know I decided on, and often recommend, Voigtlander which I am about to do again.
I love Voigtlander for the same reason I love old Zeiss glass . . . color and contrast rendering, but I'd say the VLs are a bit sharper (though it may require a little stopping down to get it). Over the Zeiss for that 85mm range FL I chose the Voigtlander 90mm/f3.5 SL II with its true APO, close-focus design. I also have the Voigtlander 58mm/f1.4, which, when I want major speed or bokeh, is the lens I turn to (you could own both those lenses for the price of the Zeiss).
The VL 58mm is relatively compact, but it isn't as compact as the VL 90mm, which is about 2 x 2.5 inches and weighs only 320g (half the weight of the Zeiss, and shorter and smaller and diameter by about an inch). At 19 inches the VL 90mm also focuses twice as close as the Zeiss (which only gets as close as 39 inches). Like Zeiss, VL lenses are all metal construction (built like tanks), and talk about smooth focusing . . . the smoothest I've ever used, hands down.
Besides rivaling Zeiss in color/contrast production and construction, the VL 90 in particular is the sharpest lens I've ever had the privilege of using. The Siren's reviewer examined the older SL I version of the VL 90
here, but it has the same optics as the newer, more lightweight and compact version. He said:
"Voigtlander APO Lanthar 90mm f/3.5 SL showed very solid overall performance in the field. Images were sharp corner to corner throughout the aperture range on both APS-C and FF cameras (Canon bodies), with accurate but a little bit saturated colors and excellent overall contrast . . . . And speaking of the closeup - the lens sports a pretty short minimum focusing distance - 50cm (1.64ft), which is quite rare in non-macro telephoto lenses. . . . Chromatic aberration on an APS-C camera was nothing to speak of (thanks to the apochromatic lens element), averaging ~0.3px throughout the frame and across all aperture settings. Quite low even for a medium telephoto lens. . . . On an APS-C body the lens showed basically no vignetting throughout the tested aperture range. Voigtlander APO Lanthar held up very nicely against flare, even at its widest aperture and showed no visible barrel distortion. Color fringing was basically non-existent across the frame. . . . Consistency is always welcome, and this lens shows one of the most consistent results I have seen so far. Conclusion? Solid, solid, solid - all that comes to mind. The only complaint I can think of is how come Voigtlander did not make this lens a bit faster?"
So there's the thing, do you need the F1.4 speed of the Zeiss? Of course, there is a price to pay for that beyond money, which is bulk, but maybe you don't mind that (I do, which is another reason I love Voigtlander, they are all relatively compact little gems . . . even the VL 180 weighs only 485g! . . . while the heaviest VL, the 125, still beats the Zeiss 85mm in weight at 685).
Some users have mentioned the Zeiss bokeh, but you don't need an 85mm lens to be fast for that since telephotos are generally easy to get bokeh from by getting close to the subject and having enough space behind. The VL 90mm is no exception in this respect, except because you can get so close, it is even easier to do. Below are a few samples that show that, as well as how lovely it renders color and how razor sharp it can be. Whatever you decide, good luck!
Lichen at f3.5:
Also at f3.5:
At f4:
Also at f4:
f4:
At f5.6:
Also at f5.6:
At f8:
Also f8:
F8:
At f11 (purposely softened in PP):