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Canon FD 300mm f/2.8 L Lens

The Canon 300mm f/2.8 L is a 300mm f/2.8 lens designed for Canon FD mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Canon FD 300mm f/2.8 L Lens

Canon FD 300mm f/2.8 L Lens

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Lens Overview — Canon 300mm f/2.8 L

The Canon FD 300mm f/2.8 L is a prime telephoto lens built for the Canon FD mount system, designed to pair with SLR film cameras. With a maximum aperture of f/2.8 at 300mm, this lens delivers strong light-gathering capability at a long focal length, making it well-suited for subjects that demand both reach and a wide aperture. As a prime lens, it covers a fixed 300mm focal length with no zoom mechanism, and it is fully manual focus in operation — there is no autofocus system.

The lens covers a full-frame image circle, making it compatible with full-frame SLR bodies using the Canon FD mount. At 2,550g, this is a substantial piece of glass that reflects the optical engineering required to achieve f/2.8 at this focal length. The filter thread size is 48mm, which is worth noting when sourcing compatible filters.

Image stabilization is not present on this lens, which is typical for optics of its era. For photographers working with Canon FD mount film bodies or mirrorless systems via an FD adapter, this lens represents a serious long-telephoto option with a fast maximum aperture and prime lens optical commitment.

Key Features — Canon 300mm f/2.8 L

300mm f/2.8 Prime: A fixed 300mm focal length with a fast f/2.8 maximum aperture delivers strong light-gathering at long range, useful for sports, wildlife, and press photography.

Canon FD L-Series Optics: Part of Canon's professional L-series lineup, indicating high-grade optical construction with premium glass elements for improved sharpness and contrast.

Full-Frame Coverage: Projects an image circle covering the full 35mm frame, compatible with all full-frame Canon FD SLR bodies without vignetting.

Manual Focus Only: Fully manual focus operation with no autofocus mechanism, requiring hands-on focusing technique typical of professional telephoto lenses of its era.

Canon FD Mount: Designed for Canon's FD-mount SLR system and widely adaptable to modern mirrorless cameras via third-party FD adapters.

48mm Drop-In Filter: Uses a 48mm rear drop-in filter system rather than a front-mounted thread, which is the practical solution for large telephoto optics of this size.

Lens Specifications — Canon 300mm f/2.8 L

Canon 300mm f/2.8 L full specifications
SpecDetail
Use CasesWildlife, Sports, Birding
Lens TypePrime
FormatFull Frame
Zoom/PrimePrime
Focal Length300mm
Maximum Aperturef/2.8
Camera SystemSLR
Lens MountCanon FD
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread48mm

Description — Canon 300mm f/2.8 L

The Canon FD 300mm f/2.8 L is a prime telephoto lens designed exclusively for the Canon FD mount and compatible SLR camera bodies. Offering a fixed 300mm focal length and a maximum aperture of f/2.8, it delivers a wide aperture at a long working distance — a combination that demands substantial optical engineering, reflected in its 2,550g body weight. The lens provides full-frame coverage, making it appropriate for full-frame SLR film bodies in the Canon FD ecosystem.

Focus is entirely manual, with no autofocus system present, and there is no image stabilization. The 48mm filter thread accommodates standard circular filters of that diameter. For photographers committed to the Canon FD mount — whether shooting film or using an FD-to-mirrorless adapter — this lens offers a dedicated long-telephoto prime with a fast f/2.8 maximum aperture as its defining characteristic.

Pros — Canon 300mm f/2.8 L

  • ✓Fast f/2.8 maximum aperture at 300mm focal length provides strong light-gathering at a long reach
  • ✓Prime lens design at exactly 300mm — no zoom compromise, dedicated single focal length
  • ✓Full-frame coverage suits full-frame SLR bodies using the Canon FD mount

Cons — Canon 300mm f/2.8 L

  • ✗Manual focus only — no autofocus system, which demands greater shooter skill for moving subjects
  • ✗At 2,550g, this lens is very heavy and will require robust support in most shooting scenarios
  • ✗No image stabilization, so managing camera shake at 300mm is entirely on the photographer

Videos — Canon 300mm f/2.8 L

Pros and Cons of Canon FD Lenses — Matt Rice

Resources & Downloads — Canon 300mm f/2.8 L

Manuals & Guides

Frequently Asked Questions — Canon 300mm f/2.8 L

What camera mount does this lens use?+
This lens uses the Canon FD mount. It is designed for Canon SLR bodies that accept the FD mount system. It cannot be natively mounted to Canon EF, EF-S, or RF bodies without an adapter.
Does this lens have autofocus?+
No. This is a manual focus only lens. There is no autofocus mechanism of any kind. The photographer must focus manually using the focus ring.
What sensor or film format does this lens cover?+
The Canon FD 300mm f/2.8 L covers a full-frame image circle, making it compatible with full-frame SLR film bodies using the Canon FD mount.
What is the maximum aperture of this lens?+
The maximum aperture is f/2.8. This is a fixed 300mm prime lens, so f/2.8 is the widest aperture available across the entire focal length.
How heavy is this lens?+
This lens weighs 2,550g. It is a substantial telephoto prime and will likely require a tripod collar and sturdy support system for extended use.
What filter thread size does this lens use?+
The filter thread size is 48mm. When purchasing filters for this lens, ensure they are sized to 48mm to fit correctly.

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