.Viltrox has launched a brand new full-frame 40mm F2.5 autofocus prime lens for Sony E-mount mirrorless video cameras. It's the same lense the provider released along with a Nikon Z-mount earlier this year.Optical designThe new Viltrox 40mm prime lense is developed for full-frame electronic cameras, however you may still use it on APS-C sensors. However, on a plant sensor cam, it will have a comparable focal span of around 60mm. The lens is constructed with 10 components in 6 groups. These feature one extra-low dispersion (ED) component, 3 higher refractive index (HR) elements, and also one aspherical element. Moreover, the lense includes a nano-coating. Viltrox mentions this reduces ghosting as well as flare for clearer, even more contrast-rich images.Wide optimum apertureThe brand-new Viltrox 40mm prime lens possesses a max aperture of F2.5, which ought to give really good low-light performance and also create it less complicated to achieve a superficial intensity of field. The iris uses a 7-blade design nonetheless, Viltrox claims that it still supplies a "lovely bokeh" in out-of-focus areas.AutofocusThe auto-focus system on the new Viltrox 40mm lens utilizes an STM (tipping electric motor). The firm mentions this provides fast as well as silent autofocus. Additionally, Viltrox says the lens features low emphasis breathing, which is actually fantastic for online video usage. Concentration breathing takes place when the photo size improvements a little as you pull focus. The 40mm lens likewise assists eye as well as face AF methods on Sony video cameras. The minimum required focus distance is just over thirteen ins (0.34 gauges). BuildThe brand new Viltrox 40mm prime lense is actually light-weight at just 5.9 ozs (167 grams). It is actually additionally compact, evaluating 2.4 inches (59.5 mm) in duration as well as 2.6 ins (65 mm) in diameter. In spite of its own size, Viltrox points out the lense has a robust building for enduring durability. It likewise possesses a weather-resistant design with an anti-fouling finish on the main glass. The filter measurements is actually 52 mm, and also the lens includes a tiny petal-style lense hood.What our experts thinkA 40mm lense is an underused central size. It's taken into consideration closer to just how our experts observe the planet with our eyes than a common 50mm lense. A 40mm lens is actually also a terrific all-round central size. Viltrox's brand-new 40mm prime lense possesses a relatively wide maximum aperture of F2.5, thus you will certainly have the ability to attain a shallow deepness of field when it is actually wide open. It will certainly additionally conduct well in low lighting. One of the most ideal components of Viltrox's brand-new lens is its own low cost. If you are actually looking for a 40mm prime lens, the Viltrox is an excellent finances alternative to consider.AvailabilityThe new Viltrox AF 40mm F2.5 full-frame prime lens for Sony E-mount mirrorless electronic cameras is accessible now. It retails for $168.