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I actually own two copies — Discover và Hengyijia for Fuji X mount & they are exactly the same design. This reviews will cover mainly Discover lens as that’s the one I used the most. As far as I can see, the lenses differ only in their defects, which are covered below.
One important thing to cảnh báo is that as far as I know there are two versions of this lens. They are easy lớn distinguish, first generation has unusual placement of aperture and focusing ring — focusing ring is close to lớn the camera body toàn thân and the aperture ring is near the front lens element. Second generation has traditional ring placement — aperture ring close khổng lồ body, focusing ring close lớn front of the lens.
DesignThis is a small all-metal lens which feels very solid in hand.
I think it fits well design-wise with the Fuji aesthetics. With my Fuji XT-10 it forms a small and well balanced combo.
Handling & build qualityFocusing ring
Focusing ring is well dampened on the Discover lens. Focus throw is quite short (about one third of lens circumference) which makes manual focusing a bit challenging with larger apertures. On Hengyijia, dampening is a little bit looser which makes accidental misfocusing more frequent — sometimes I focused correctly, shot a picture and then at home I found out it’s far from focused correctly. I think that in the second between focusing & activating shutter I must have slightly altered the focus which in combination with very short focusing throw made a big difference in the photo sharpness.
With all that said, manual focusing is quite enjoyable. As I understand this is a big difference compared to lớn the first generation where the focusing ring placement made manual focusing awkward.
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Focusing ring has a distance scale khổng lồ aid in zone focusing. But focusing is probably misaligned in some way và the distance scale is off — infinity is around 6 meters mark on the distance scale. Anything after that focuses “after infinity” — i.e. Nothing is in focus.
This probably differs one copy from another — in my case Discover is slightly more off than Hengyijia.
Focus ring is in the front, aperture in the back which is different from the first generation of the lens. Shot with Hengyijia.
Aperture ring
Aperture ring is click-less and goes from f/1.8 to lớn f/16. On Discover copy, it is well dampened (similar to lớn the focusing ring) which makes it nice lớn use and makes it unlikely khổng lồ be changed by mistake.
Aperture ring on Hengyijia is a little bit worse — from f/2 lớn f/8 it’s a little looser and from f/1.8 to lớn f/2 & f/8 lớn f/16 it’s tighter & you need a bit more force. It also feels like there is some dust particles in the mechanism which makes the change not totally smooth as in the Discover copy. But these “defects” don’t present any real problem in use.
I noticed that aperture ring is quite off. I did a very simple non-scientific kiểm tra — I phối the camera on ISO 200, lens on f/2 and tuned the exposition compensation so that shutter tốc độ falls on 1/100s. Then I switched lens to lớn f/4, f/8 and f/16 to see what’s the shutter speed, expecting that it should go down by the factor of 4 (since I’m testing 2 stop differences). Results (sorry for the table look):
| Aperture | f/2 | f/4 | f/8 | f/16 || Measured shutter tốc độ | 1/100 | 1/58 | 1/25 | 1/8 || Expected shutter tốc độ | 1/100 | 1/25 | 1/6 | 1/1.5 |One possible explanation is the heavy vignetting at larger apertures which makes metering choose slower shutter tốc độ than expected.
Glass
The only remark here is that front lens element on the Discover copy has small bubble roughly in its center. It doesn’t seem khổng lồ affect the image in any way.