Canon RF-S 3.9mm F3.5 STM Dual Fisheye

Canon RF

Autofocus
Canon RF-S 3.9mm F3.5 STM Dual Fisheye

Overview

The Canon RF-S 3.9mm F3.5 STM Dual Fisheye lens is an innovative addition to Canon's RF lens lineup. This unique lens offers an intriguing perspective that caters to both enthusiasts and professionals interested in creating immersive 360-degree content. With its dual fisheye design, it ensures users can capture striking spherical images and videos, making it an essential tool for virtual reality (VR) and panoramic photography.

Build and Design

The first thing that stands out about the RF-S 3.9mm F3.5 STM Dual Fisheye is its compact size and lightweight design. At just a few hundred grams, it’s incredibly portable, which is perfect for travel or on-location shoots. The lens features a sleek construction with a metal mount that gives it a solid feel despite its lightweight body. Its minimalist aesthetic complements Canon’s modern RF camera bodies, and the small form factor means it can be easily stored in a camera bag without taking up too much space.

Image Quality

When it comes to imaging performance, the Canon RF-S Dual Fisheye lens impresses with its ability to produce vivid colors and sharp details across its entire field of view. The F3.5 aperture allows for decent low-light performance, although it's worth noting that, like many fisheye lenses, it can introduce noticeable distortion. However, this is often desired in creative applications where the warping of lines contributes to the overall effect. The lens also features advanced coatings that reduce flare and ghosting, enhancing the overall image quality.

Focusing and Use

The stepping motor (STM) technology provides smooth and quiet autofocus, which is beneficial for both video work and capturing fast-moving subjects. While fisheye lenses typically have a deep depth of field, allowing users to focus on subjects close or far away, the RF-S Dual Fisheye excels in offering versatility in framing. The lens allows for creative shots, whether you're capturing landscapes, architectural structures, or unique perspectives on everyday objects.

Compatibility

Since this lens is designed for the Canon RF mount, it is most compatible with Canon’s latest mirrorless camera systems. It’s essential to consider that this lens is more specialized compared to traditional prime or zoom lenses, limiting its use for those who primarily shoot general photography. However, for those venturing into 360-degree content creation, it opens up a new realm of creative possibilities.

Pros and Cons

Pros

  • Compact and lightweight design for portability.
  • Excellent image quality with vibrant colors and sharp details.
  • Smooth autofocus with STM technology.
  • Ideal for 360-degree photography and VR content creation.

Cons

  • Noticeable distortion is inherent to fisheye design, which may not suit everyone.
  • Limited to specific use cases, making it less versatile for general photography.

Verdict

The Canon RF-S 3.9mm F3.5 STM Dual Fisheye lens is a standout choice for photographers and videographers looking to explore the niche of immersive content creation. Its compact size, excellent image quality, and smooth autofocus make it a fantastic option for capturing unique perspectives. While the distortion may not appeal to everyone, it is a welcomed characteristic in the world of fisheye photography. Overall, if you're in the market for a lens that specializes in 360-degree images and VR, the RF-S Dual Fisheye is certainly worth considering.

Technical Specifications

3.9mm
min focal length
3.9mm
max focal length
f3.5
max f (min zoom)
f3.5
max f (max zoom)
30.5mm
Filter diameter
20cm
min focus distance
f16
min. aperture
290g
Weight
11
Elements
8
Groups
55mm
Length
112mm
Diameter

Which cameras does the Canon RF-S 3.9mm F3.5 STM Dual Fisheye fit?

The Canon RF-S 3.9mm F3.5 STM Dual Fisheye is designed for APS-C sensors. On APS-C Canon RF cameras its field of view equals 6 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

Canon RF cameras

Full frame (in APS-C mode):
Canon EOS R6 V, Canon EOS R6 Mark III, Canon EOS C50, Canon EOS R1, Canon EOS R5 Mark II, Canon EOS C400, Canon EOS C80, Canon EOS R8, Canon EOS R6 Mark II, Canon EOS R5 C, Canon EOS R3, Canon EOS R5, Canon EOS R6, Canon EOS Ra, Canon EOS RP, Canon EOS R
APS-C:
Canon EOS R50 V, Canon EOS R100, Canon EOS R50, Canon EOS R7, Canon EOS R10, Canon EOS C70

Canon RF-S 3.9mm F3.5 STM Dual Fisheye compared

Key specs side by side with the most similar Canon RF lenses.

LensCanon RF-S 3.9mm F3.5 STM Dual FisheyeVenus Laowa 4mm F2.8 Fisheye
Focal length3.9 mm4 mm
Max. aperturef/3.5f/2.8
Weight290 g135 g
Filter diameter30.5 mm–
Min. focus distance20 cm8 cm
Length55 mm26 mm
Autofocusyesno
Image stabilizationnono

Canon RF-S 3.9mm F3.5 STM Dual Fisheye: FAQ

Does the Canon RF-S 3.9mm F3.5 STM Dual Fisheye have autofocus?

Yes, the Canon RF-S 3.9mm F3.5 STM Dual Fisheye has autofocus.

Does the Canon RF-S 3.9mm F3.5 STM Dual Fisheye have image stabilization?

No, the Canon RF-S 3.9mm F3.5 STM Dual Fisheye has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the Canon RF-S 3.9mm F3.5 STM Dual Fisheye weigh?

The Canon RF-S 3.9mm F3.5 STM Dual Fisheye weighs 290 g. It is 55 mm long with a diameter of 112 mm.

What filter size does the Canon RF-S 3.9mm F3.5 STM Dual Fisheye use?

The Canon RF-S 3.9mm F3.5 STM Dual Fisheye takes 30.5 mm screw-in filters.

How close can the Canon RF-S 3.9mm F3.5 STM Dual Fisheye focus?

The minimum focus distance of the Canon RF-S 3.9mm F3.5 STM Dual Fisheye is 20 cm, measured from the sensor plane.

Is the Canon RF-S 3.9mm F3.5 STM Dual Fisheye a full-frame lens?

No, the Canon RF-S 3.9mm F3.5 STM Dual Fisheye is an APS-C lens. On APS-C cameras its field of view equals 6 mm in full-frame terms.

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