I only own two lenses for the GFX 50s, the 32-64 and the 120 F4 macro. Why only two I hear you ask? Well, I'm not a full time pro and although I'm a part time pro I still can't afford to splash out on more than these two ( currently, once some more of my organs sell on ebay who knows? How many kidneys do you really need anyway?). Joking aside, these two lenses pretty much cover everything I need for model photography at the moment. OK so I can't do mega shallow depth of field with this zoom, but I didn't buy this camera for that reason. So lets get down to the review.
This lens roughly equates to 25-51mm on a full frame camera. It's kinda sorta like a 24-70 but more restricted at the long end. It's also "only" F4, but on a medium format camera, thats plenty IMO unless you want everyone's ears out of focus. There is no OIS on this lens, unlike the 120mm F4, so I would humbly suggest this is not a great low light lens unless your subject is sat very still and you have a tripod. Build quality is superb as you would expect for the price tag, and it is weather sealed.
This is one of the sharpest zoom lenses I've ever shot with. It smokes every 24-70 I've ever shot with for sharpness( including the Canon 24-70 mk2, which was a great lens, but very boring ). It's better at the wide end but still amazing in the centre at the long end. I've never been a great fan of the 24-70 lens, I prefer prime lenses in general. However, this lens is awesome, I love it. It allows you to get some fairly epic wide angle shots while retaining amazing detail and sharpness. As a fashion/portrait photographer I'm a sucker for wide angle shots and this thing delivers in spades. Until now for this kind of shot I've been using the 16mm 1.4 on my Fuji X cameras, but since I got this lens it hasn't got a look in ( and that 16mm 1.4 is something special ).
I'm not into the technical stuff I'm afraid, but suffice to say for my purposes ( model photography ), this lens is simply superb and the only lens I use for wide angle fashion. It's very versatile as you can shoot wider portraits with it as well and it even does very nice bokeh at the long end. The detail you get from this lens and the camera is fantastic. Most zooms in this range have disappointed me, not this one. It's also pretty awesome for group shots at weddings.
So I initially bought the 63mm 2.8 and used that on a shoot. I found it a bit limited even though I quite like the 50mm focal length. I got to thinking, why not get this zoom instead and have a much more flexible lens with only one stop of light less. And I've been very pleased I did that. One major drawback when I got this lens was the sync speed of 1/125 on the camera. This effectively meant that when using strobes/speedlights with this lens I would need a tripod to be 100% sure of a sharp image, as its quite heavy and I don't get a 100% hit rate at 1/125. Since then Godox has released its new trigger enabling HSS and it works wonderfully, so one of the main drawbacks of this lens and camera combo has for me, at least, been resolved.
Here are some more images I've shot with this lens.
This lens is brilliant. I can't really think of much to say that's negative about it. OIS would have been nice, as would a slightly faster aperture, but then I would not have been able to afford it. I'm using it for group shots at weddings, epic wide angles for couple shots/engagements, but mostly for wide angle model shots where you want to include the environment. Its very sharp, the images have amazing detail and punch, and I could not be happier with this lens, it is the perfect complement to my 120mm F4 and I love the results I get from it. I'm just not used to a zoom of this focal length delivering images this sharp and detailed.