Manual focus fisheye lens for APS-C cameras with f/3.5 aperture.
The Samyang 8mm f/3.5 Aspherical IF MC Fisheye CS II is a circular fisheye lens for APS-C Sony E mount cameras, providing a 180-degree circular fisheye image (CS = Crop Sensor). The second version (II) features improved coatings and optical formula over the original. AS = Aspherical; IF = Internal Focus; MC = Multi-Coated.
8mm focal length, f/3.5 maximum aperture, circular fisheye (180-degree field of view), CS (APS-C image circle), Aspherical/IF/MC formula, Sony E mount, manual focus only.
The circular fisheye creates a round image with black borders on APS-C sensors, distinct from a full-frame fisheye which fills the entire image area. The 180-degree field of view produces dramatic spherical distortion used in creative photography, sports wide-angle coverage, and scientific imaging. Manual focus only requires EVF magnification for critical focus.
Inspect for fungus, haze, and coating condition. Test the IF focus mechanism. Confirm Sony E mount engagement. Check aperture blades for cleanliness. Test on an APS-C body to confirm the circular fisheye image coverage and verify the II generation improvements over the original.