Picking a compact, affordable 35mm lens for Sony full frame is harder than it looks. The Samyang AF 35mm f/1.8 FE sits at around $400 and promises a lightweight option for Sony E-mount shooters, but whether the image quality backs up that price is a different question.
Coming to you from Christopher Frost, this thorough video puts the Samyang AF 35mm f/1.8 FE through its paces on a Sony a7C R, which means the lens is being tested against a punishing 61-megapixel sensor with no mercy. Frost notes that the lens is lightweight at 216 grams, includes a metal rear mount, a USB-C port for firmware updates, and a weather-sealing gasket, which is a reasonable package at this price. Build quality is plastic-heavy, autofocus speed is only average, and there's noticeable focus breathing in continuous shooting. On the positive side, autofocus tracking held up well in testing, and the lens is genuinely light for a full frame 35mm optic.
Where things get more complicated is image quality. At f/1.8, center sharpness is acceptable but hampered by low contrast, ghosting, and clear purple fringing. Stop down to f/2.8 and the picture changes dramatically, with strong corner-to-corner sharpness that looks genuinely impressive. The problem Frost identifies is a real one: you buy an f/1.8 lens to shoot at f/1.8, and at that aperture this lens simply doesn't deliver the edge you'd expect. Close-up image quality at f/1.8 is particularly rough, and longitudinal chromatic aberration is, by Frost's description, some of the worst he's seen on any lens.
One thing worth knowing before you write this lens off entirely: APS-C performance is slightly better than full frame, and the lens does clean up meaningfully once you stop down to f/2.8 or f/4. Vignetting without in-camera corrections is strong at f/1.8 but manageable with them on. Bokeh is average, with some outlining on bright specular highlights and busy rendering in complex backgrounds. Sun stars appear at f/5.6 and become more defined as you stop down further. Frost also tests flare and finds it relatively tame in real-world shooting conditions. None of this is catastrophic, but taken together with the f/1.8 performance issues, it paints a picture of a lens that works best when you're not using it the way most people intend to.
Frost is direct in his conclusion: he has a genuine appreciation for Samyang lenses and enjoyed their 35mm f/1.4 option, but this f/1.8 version has real optical shortcomings that are hard to overlook in 2026, especially with Chinese manufacturers continuing to push the value end of the market forward. Check out the video above for the full breakdown from Frost.
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