Viltrox E 40mm f/2.5

The Viltrox AF 40mm F2.5 is a compact, lightweight full-frame-compatible prime positioned as an inexpensive alternative for Nikon Z and Sony E shooters. According to the review, it uses a 10-element optical formula in 6 groups, has a 57.8° angle of view, a seven-blade diaphragm, a minimum aperture of f/16 and a 52mm filter thread. The page notes a metal mounting plate and a USB-C firmware port; the lens is supplied with a petal-shaped hood and a pouch. In testing the reviewer found good centre sharpness even at f/2.5, with corner performance falling toward the extreme edges but remaining acceptable; colour fringing and barrel distortion are present but largely mitigated by in-camera corrections and lens profiles. Autofocus is driven by a linear stepping motor described as fast and near-silent; minimum focus distance is 0.34m for a maximum magnification of 0.14x. Retail listings shown on the page are around $151–$168, reinforcing its very affordable positioning.