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Canon FD 400mm f/4.5 Lens

The Canon 400mm f/4.5 is a 400mm f/4.5 lens designed for Canon FD mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Canon FD 400mm f/4.5 Lens

Canon FD 400mm f/4.5 Lens

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Lens Overview — Canon 400mm f/4.5

The Canon FD 400mm f/4.5 is a manual-focus prime telephoto lens built for the Canon FD mount, designed to cover full-frame SLR cameras. With a fixed 400mm focal length and a maximum aperture of f/4.5, it delivers a substantial reach suited to subjects at distance. As a prime lens, it offers a single focal length with no zoom capability, which typically benefits optical consistency across the frame.

The lens is manual focus only, meaning photographers work the focus ring directly — a workflow that suits deliberate, considered shooting styles. At 1,200g, this is a substantial piece of glass that reflects the robust construction common to Canon's FD-era telephoto lineup. The 72mm filter thread allows for the use of standard screw-on filters such as UV or polarizers.

Image stabilization is not present, which is worth factoring in when shooting handheld at this focal length. The Canon FD mount means this lens is natively compatible with Canon FD-mount SLR bodies, though it can also be adapted to a range of modern mirrorless systems with the appropriate third-party adapter. For photographers drawn to vintage glass or working with classic Canon SLR bodies, this 400mm prime represents a capable long-reach option.

Key Features — Canon 400mm f/4.5

400mm Prime Focal Length: Fixed 400mm reach keeps optical complexity low and delivers consistent image quality across the frame for distant subjects.

f/4.5 Maximum Aperture: Reasonably fast for a 400mm telephoto, allowing usable shutter speeds in moderate light conditions.

Canon FD Mount: Natively compatible with Canon FD-mount SLR bodies and adaptable to a wide range of modern mirrorless systems via third-party adapters.

Full-Frame Coverage: Designed to cover full-frame sensors, making it usable on both full-frame and crop-sensor bodies without vignetting.

Manual Focus Only: Direct focus ring operation suits deliberate shooting styles such as wildlife at rest, sports with predictable motion, or landscape work.

72mm Filter Thread: Standard filter size accepts common screw-on filters including UV and polarizers for added versatility in the field.

Lens Specifications — Canon 400mm f/4.5

Canon 400mm f/4.5 full specifications
SpecDetail
Use CasesWildlife, Sports, Birding
Lens TypeTelephoto
FormatFull Frame
Zoom/PrimePrime
Focal Length400mm
Maximum Aperturef/4.5
Camera SystemSLR
Lens MountCanon FD
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread72mm

Description — Canon 400mm f/4.5

The Canon FD 400mm f/4.5 is a prime telephoto lens built for Canon FD-mount SLR cameras, with coverage designed for full-frame sensors. Its fixed 400mm focal length and f/4.5 maximum aperture make it a long-reach option for photographers who prefer the simplicity and optical focus of a prime design. Focusing is entirely manual, placing full control in the photographer's hands via the focus ring — a deliberate approach that suits methodical shooting workflows.

There is no image stabilization, so technique and support equipment become important factors when using this lens. The 72mm filter thread provides compatibility with a wide range of standard screw-on filters. Weighing in at 1,200g, the lens has the solid, substantial feel characteristic of Canon's FD telephoto range.

Whether used on a classic Canon SLR body or adapted to a modern mirrorless system, this lens brings considerable focal reach to any setup.

Pros — Canon 400mm f/4.5

  • ✓400mm prime focal length provides strong reach for distant subjects
  • ✓f/4.5 maximum aperture delivers reasonable light gathering for a 400mm telephoto
  • ✓Full-frame coverage (lensFormat: Full Frame) ensures compatibility across sensor sizes

Cons — Canon 400mm f/4.5

  • ✗Manual focus only — no autofocus capability, which demands more skill and patience at 400mm
  • ✗No image stabilization (imageStabilization: None), making handheld use at this focal length more challenging
  • ✗1,200g weight makes this a heavy lens to carry and handhold for extended periods

Videos — Canon 400mm f/4.5

Canon 100-400mm f/4.5-5.6 IS USM 'L' lens review with samples (APS-C and full-frame) — Christopher Frost

Resources & Downloads — Canon 400mm f/4.5

Manuals & Guides

Frequently Asked Questions — Canon 400mm f/4.5

What cameras is this lens compatible with?+
This lens uses a Canon FD mount, making it natively compatible with Canon FD-mount SLR cameras. With a third-party adapter, it can also be used on a range of modern mirrorless camera systems, though adapter compatibility depends on the specific body.
Does this lens have autofocus?+
No — this lens is manual focus only. There is no autofocus mechanism, so focus must be set by hand using the focus ring. This is a key consideration when shooting fast-moving subjects at 400mm.
What is the maximum aperture of this lens?+
The maximum aperture is f/4.5. This is the widest the lens can open, determining how much light it can gather at its brightest setting.
What filter size does this lens accept?+
The lens has a 72mm filter thread, so it accepts standard 72mm screw-on filters such as UV, polarizing, or neutral density filters.
Does this lens have image stabilization?+
No, this lens does not include image stabilization. At 400mm, keeping shots sharp — especially handheld — will require attention to shutter speed or the use of a tripod or monopod.
How heavy is the Canon FD 400mm f/4.5?+
The lens weighs 1,200g. This is a significant weight to factor into your kit, and a sturdy support system is advisable for extended shooting sessions.

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