So the DOF difference is 1/3rd stop, in other words, nearly indistinguishable. This is important given the very shallow depth of field when shooting wide open.Fujifilm corrects certain lens aberrations in-camera, with both vignetting and residual chromatic aberrations removed almost entirely in the camera’s JPEGs.
The bokeh is a bit smoother, and you get the extra stop of aperture, and of course the much smaller size in comparison to the 50-140. Past f/16 a red ‘A’ mark is visible, indicating the lens’s automatic position. It of course lacks automatic focusing, but could otherwise be good option for portraits. But, what I really like most, compared to other review sites are your pictures! Do you still have the Olympus 75mm/1.8 to compare this against?I tested the lens on my X-T1 with firmware v. 4.0 and found the lens very capable at keeping up in continuous autofocus functions as well. Today I review the brand new XF 90mm f/2 R LM WR, a lens that has the field of view of the classic 135mm long-portrait lens that has been a staple of many systems over the years. The mockup presented there was a bit shorter than this final design, but significantly fatter, which would have caused much larger issues in fitting into camera bags and handling on cameras with narrower grips.The XF 90mm f/2 is the first Fuji X prime lens to receive Fuji’s fast and silent linear motor system, and it performs very well indeed.
Called the Quad Linear Motor system, it is made up of four focus motors working together to shift the large focusing group inside the lens. Ce que l'on apprécie par-dessus tout, c'est que l'objectif procure le même niveau de qualité de f/2 à f/11 : un très bon point. In full format terms that's roughly equivalent to "140mm f/3.1" (field of view & depth-of-field).
The autofocusing isn’t as fast as some of Fuji’s lenses, but it’s a definite improvement over the 56mm and is very quiet and accurate. However, the manual focusing ring that covers a large amount of the lens handles very well. Here’s an example 25/1.4 = 17.85mm and 50/2.8 = 17.85mm, even without considering sensor size you can figure out that these lenses will provide the same DOF.I still have my Oly 75/1.8 with me on a E-M5, the IBIS really helps.
The 75mm focuses a little faster (more a function of the cameras than anything else), and it’s a lot smaller to boot. Par contre, elle ne dispose pas de repères de butée pour indiquer la distance minimale ou l'infini, ni d'indicateur de distance de mise au point : dommage.La qualité optique de ce 90 mm est tout simplement excellente.
The Olympus also received a $200 price cut last year, so it’s $699 price tag is perhaps more palatable than it’s $899 introduction.Even then, the difference is very small. On a coutume de dire que le piqué est optimal au centre et aux ouvertures moyennes : f/8 ou f/11 par exemple. Shooting at f/5.6 seems to be the sharpest point of the lens overall, with nice, sharp corners. On stopping down a bit, though, out-of-focus highlights turn heptagonal rather than circular. I think of getting the old XF56mm or the new XF90mm. The 75mm is also slightly longer at ~150mm equiv vs ~135mm equiv, which means for a given framing, the out of focus area will be slightly magnified with the Olympus which further narrows the gap.It doesn’t make sense to count the physical aperture difference, and sensor size difference, you’re counting the difference twice at that point. Ce 90 mm s'avère donc être une arme redoutable pour les amateurs de portraits.De plus, le piqué va dépendre de la définition du capteur de votre appareil (nous avons testé l'objectif avec un X-T1 de 16 Mpx) et la taille de son capteur (APS-C pour le X-T1). La photo est pour lui une obsession.Au final nous ne pouvons que recommander cet objectif qui, malgré des dimensions un peu imposantes et un poids certain, procure une excellente qualité d'image. On apprécie sa conception tout temps, sa qualité de fabrication et la présence d'une réelle bague de diaphragme manuelle. In addition, stunning depth is possible in images thanks to the differentiation between the razor-sharp subject and the bokeh in front and behind it.The optical construction comprises 11 elements in 8 groups, including three ED (extra low-dispersion) elements, which reduces chromatic aberrations to deliver sharp, rich images even at the widest aperture of F2.0.A linear motor is fast, quiet and accurate, but here four magnets are used for higher torque. Il dépend de nombreux paramètres dont principalement la conception de l'objectif, la forme et la taille du diaphragme.La bague de mise au point manuelle est un plaisir à utiliser.