Fujifilm GF 23mm f/4 R LM WR Lens

I do like this lens, and it complements the 32-64mm f/4 and 110mm f/2 quite nicely. Build quality seems to be equivalent to the 110mm f/2, i.e., very good. Size and weight is reasonable, and I would rate overall image quality worthy of the asking price. Distortion is very well controlled, contrast and resolution are both impressive from f/4 and resolution peaks somewhere between f/8 – f/11 (although I often find myself using smaller apertures for depth of field reasons). Flare resistance is generally quite good provided you stick to reasonable apertures, although if you want extreme flare, you can have it by stopping down to f/32 and experimenting with the sun's location in the frame. On a related note, I'm not in love with the sunstars coming from the 23mm - not ... MoreI do like this lens, and it complements the 32-64mm f/4 and 110mm f/2 quite nicely. Build quality seems to be equivalent to the 110mm f/2, i.e., very good. Size and weight is reasonable, and I would rate overall image quality worthy of the asking price. Distortion is very well controlled, contrast and resolution are both impressive from f/4 and resolution peaks somewhere between f/8 – f/11 (although I often find myself using smaller apertures for depth of field reasons). Flare resistance is generally quite good provided you stick to reasonable apertures, although if you want extreme flare, you can have it by stopping down to f/32 and experimenting with the sun's location in the frame. On a related note, I'm not in love with the sunstars coming from the 23mm - not that they are bad, but I prefer the aesthetic of the sunstars from the 32-64mm f/4. I have attempted astrophotography with this lens, correction of comatic aberration at f/4 is good but not perfect in the extreme corners, although I'm not sure it really matters much - that f/4 maximum aperture combined with the high resolution of the GFX's sensor makes this lens/body combination less than ideal for astro. As for more traditional landscape photography, the lens does not disappoint - vignetting is minimal when stopped down, the corners are sharp, I don't see any sign of chromatic aberration.

On a GFX100, this thing sparkles and shines - it's a whole different ballgame to FF. For several reasons. It's really sharp, especially around the f:11 mark (but impressive throughout its aperture range, perhaps a little fall off at the corners wide open, and certainly bests the Zeiss 18mm Milvius or the older Distagon 21 on a Canon5d4 or 5DSR even allowing for the different sensors). The distortion profile is completely different to a full frame lens - as long as you pay some attention to your verticals and your horizontals, you're going to be surprised at how well this lens controls distortion. Color rendition is particularly realistic, unlike the aforementioned Zeiss lenses, which tend to over-saturate color. There's hardly any need for color work in post. This ... MoreOn a GFX100, this thing sparkles and shines - it's a whole different ballgame to FF. For several reasons. It's really sharp, especially around the f:11 mark (but impressive throughout its aperture range, perhaps a little fall off at the corners wide open, and certainly bests the Zeiss 18mm Milvius or the older Distagon 21 on a Canon5d4 or 5DSR even allowing for the different sensors). The distortion profile is completely different to a full frame lens - as long as you pay some attention to your verticals and your horizontals, you're going to be surprised at how well this lens controls distortion. Color rendition is particularly realistic, unlike the aforementioned Zeiss lenses, which tend to over-saturate color. There's hardly any need for color work in post. This is one of Fuji's strong points. Zone focussing is the order of the day here; and manual with close up work, as is the case with any lens this wide. Auto seems about par for the course otherwise - not particularly fast but more than adequate for a wide. It's a lovely lens to use manually. Everything feels so solid, well built and connected - good on the bigger body. I've only really used this lens in manual/raw modes, so can't comment on Fuji's film simulations, etc. This lens rewards patience and consideration - it's as good as or better than any of the other prime GF lenses I've used and bests the zooms. Highly recommended, if this length is what you want.

This is a beautiful lens in every way. It is sharp, perfectly contrasty, appears to be flare-proof and is built with a quality that rivals the best of my old Zeiss and Sekor primes. I am impressed at how Fujifilm has vaulted itself to the top of the lens maker heap in a short period of time. The image quality is simply other-worldly with the GFX50S and this lens paired together.I frequently tell people that if they are doing video, sports or wildlife photography - then the GFX system will not make any sense to them. But if you shoot portraits, architecture, landscapes or product photography then you will not find a better system available today. If you focus on architecture or landscapes in particular then this lens belongs in your kit.