EF8-15mm f/4L Fisheye USM

EF8-15mm f/4L Fisheye USM

This innovative fisheye zoom does dual duty as the world’s first* real circular fisheye and diagonal fisheye for cameras equipped with a full-size CMOS sensor and as a diagonal fisheye/ultra-wide lens for APS-C/H sensors. In addition to exceptional imaging quality across the entire range, the lens is marked with “C” and “H” markings to ensure vignette-free shooting with digital cameras equipped with APS-C/H size sensors. A zoom limiter makes it possible to define the zoom range for enhanced precision. This innovative lens opens up a new realm of creative expression for photos and video.

  • *Among interchangeable SLR lenses; as of August 2010; Canon data


  • EF8-15mm f/4L Fisheye USM, Canon EOS 5D Mark II, 180sec. × 15 images(composite image), f/4, ISO1600
  • EF8-15mm f/4L Fisheye USM, Canon EOS 5D Mark II, 120sec., f/3.5, ISO1600
  • EF8-15mm f/4L Fisheye USM, Canon EOS 5D Mark II, 180sec., f/4, ISO1600
  • EF8-15mm f/4L Fisheye USM, Canon EOS 5D Mark II, 180sec., f/4, ISO1600


Angle of View
(horizontal, vertical, diagonal)
180°−142°/180°−91° 46’/180°−175° 30’
No. of Diaphragm Blades 7
Closest Focusing Distance 0.15m
Maximum Magnification 0.34x (at 15mm)
Water/dust Resistance Yes
Filter Size Lens rear drop-in filter
Max. Diameter x Length Ø78.5 × 83.0mm
Weight Approx. 540g
Extension Tube EF12 II No
Extension Tube EF25 II No
Lens Cap 8-15
Lens Hood EW-77
Lens Pouch/Case LP1219

  • UD element
  • GMo aspherical lens
  • SWC
  • Fluorine Coating

MTF Characteristics

Spatial frequency Maximum aperture
10 lines/mm
30 lines/mm
How to read
MTF characteristics

Spatial frequency Maximum aperture
10 lines/mm
30 lines/mm

The more the S and M curves are in line, the more natural the blurred image becomes.

Modulation Transfer Function, or MTF, is a method of evaluating lens performance using contrast reproduction ratio. When evaluating the electrical characteristics of audio equipment, one important measure of performance is frequency response. This indicates the fidelity of the reproduced sound with respect to the source sound as it passes through the microphone, recording and playback circuits, and finally the speakers. When the reproduction is accurate, the equipment is classified as “hi-fi,” or “high fidelity.”
In the same way, when a lens is viewed as a transmission system for optical signals, measuring the frequency response of the optical system reveals whether the optical signal is transmitted faithfully. For a lens, the equivalent of frequency is “spatial frequency,” which indicates how many patterns, or cycles, of changes in sinusoidal density are present in a 1 mm width. Accordingly, the unit of spatial frequency is lines per mm, as opposed to Hz in electrical systems.

The MTF characteristics shown on this website are 10 lines/mm and 30 lines/mm, where the horizontal axis indicates image height (the distance on a diagonal line from the center of the image, in mm) with the image center set to 0, and the vertical axis indicates contrast. The closer the 10-line/mm curve is to 1, the better the contrast and clarity of the lens; the closer the 30-line/mm curve is to 1, the better the resolving power and sharpness of the lens. Although a good balance between both of these is important for a lens to be sharp and clear, a lens is generally said to offer excellent image quality if the 10-line/mm curve is greater than 0.8, or satisfactory image quality if greater than 0.6.

Resolving power and contrast are both good

Contrast is good; resolving power is poor

Resolving power is good; contrast is poor