Mehdi

I had the 35 f1.4 at some point. Though the image quality was great, I couldn't quite get used to the noisy auto-focus motor.
 
When I heard there was a f2 version I did some bokeh tests to see what the difference in wide-open depth of field was. Just a simple test, nothing solid or scientific. Under the circumstances i didn't actually see very much difference between f1.4 and f2. I also tried f2.8 and that was a difference; i liked f2 better.
 
Also I find the 35 f2 actually has a very pleasant kind of bokeh. It's very smooth. And it's fast and silent with WR as a bonus. The faster AF speed is very helpful for photographing small children. My daughter has a tendency to run up straight to the camera so it won't focus because the distance is too small.
 
The X-T2 supposedly has better low light performance. So for photographing kids, personally I'd pick the f2 over the f1.4.
 
For the 23mm I love the f1.4 version. I haven't tried the f2 version, because I don't feel the need for it. The 23 f1.4 performs fantastic on the X-T2! It's a lot more responsive then it was on the X-T1 and somehow it seems to focus with much more precision as well. The noise of the 23 doesn't nearly bother me as much as the noise of the 35 f1.4 did.

I don't own the 35mm 1.4 anymore, but I own the 56mm 1.2, which in my opinion, on the XT1 was SLOWER to focus than the 35.
On the XT-2 it is much faster. Usable in AF-C, where as on the XT1, I couldn't really shoot much movement at all.

Not going to load up videos etc...but I will tell you this...the 35 1.4 is loud and slow ...loud meaning too loud to shoot video, not so loud you would hear it in a church (maybe)....the AF performance, in any light, will not match the newest Fuji lenses.

 

In a quiet room taking portraits my partner has commented on hearing the lens.

 

That's NEVER good.

 

It's more like first generation AF vs. third.

 

Two generations better IMHO.

 

I shoot in very poor lighting conditions doing editorial photography frequently at night...the 35 1.4 is up to the task most of the time, and certainly not all of the time, especially in AF-C.

 

I keep it and haven't ordered the 35 f2 because I literally need that extra stop of light.

 

I'm often shooting at 1/125 @ f 1.4, ISO 6400,....slower than 1/125 and I have to much people blur (all of my work involves people).

 

It comes down to this:

 

Unless you frequently need every ounce of light you can squeeze out of your lens/camera combo, do NOT get the 35 1.4.

 

And by "need" I mean getting that shot is the difference between a wasted evening and not.

 

The 35 1.4, although a stellar lens, it is significantly slower and bigger in all regards, with arguably equal image quality.

 

A lot bigger....and a ton slower.

 

No comparison.

 

BTW:  it is noticeably faster on an X-T2 than X-T1 / X-T10

 

Peter

 

www.kma438.com

www.tmaxphoto.com

If it's any help or use to you:  I've owned my 35 1.4 since February 2013 and used it on my X-E1 and now on my X-T1.  It is an amazing lens, though still slow at acquiring focus.  I use it for many things including photographing three boys all under five, and you know how fast they can be.  So it is somewhat frustrating when I miss a shot, but at the same time when I nail it, I NAIL IT and the photos are just gorgeous.  
 
I don't have an X-T2 yet, that won't come until next Spring but the 35 1.4 will def. be on it at some point.