Fujifilm Fujinon XF 16-50 mm f/2.8-4.8 R LM WR
7. Coma, astigmatism and bokeh
X-T2, 16 mm, f/2.8, centre | X-T2, 16 mm, f/2.8, Corner |
![]() |
![]() |
X-T2, 33 mm, f/3.8, centre | X-T2, 33 mm, f/3.8, Corner |
![]() |
![]() |
X-T2, 50 mm, f/4.8, centre | X-T2, 50 mm, f/4.8, Corner |
![]() |
![]() |
A bit more transparent image you can notice when, instead of a diode, you use more point-like sources of light positioned in infinity so stars. In this case classic comatic deformations are a tad more visible but still they don't exceed medium values.
Please Support UsIf you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
X-T2, 16 mm, f/2.8, top left Corner | X-T2, 16 mm, f/4.0, top left Corner |
![]() |
![]() |
X-T2, 50 mm, f/4.8, top left Corner | X-T2, 50 mm, f/5.6, top left Corner |
![]() |
![]() |
Astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, amounted to 4.2%. It's a result on the borderline between very low and low level so it doesn't give us any reasons to complain. It's worth adding that in this case there are no significant differences between particular focal lengths.
When it comes to out-of-focus areas we didn't expect miracles because let's face it, most of factors are against the tested Fujinon. You deal here with a slight zoom lens that gets slower very quickly and, additionally, its optical system features as many as three aspherical elements. There are no miracles indeed and the out-of-focus areas are nothing that might bowl you over but they aren't very bad either. Defocused circles of light show a distinct rim and some traces of onion-ring bokeh. The correction of mechanical vignetting should be praised for a change and a good result in this area is a bit surprising because of the kind of instrument you are dealing with. This vignetting is visible only at the maximum relative aperture and it disappears completely on stopping down the aperture to f/5.6.
X-T2, 50 mm, f/4.8, centre | X-T2, 50 mm, f/4.8, Corner |
![]() |
![]() |
X-T2, 50 mm, f/5.6, centre | X-T2, 50 mm, f/5.6, Corner |
![]() |
![]() |
X-T2, 50 mm, f/8.0, centre | X-T2, 50 mm, f/8.0, Corner |
![]() |
![]() |