High Image Quality: Typically offer excellent sharpness, contrast, and color rendition due to their prime (fixed focal length) design.
Large Apertures: Many 300mm primes boast wide maximum apertures (e.g., f/2.8 or f/4), allowing for shallow depth of field, excellent low-light performance, and faster shutter speeds.
Telephoto Reach: The 300mm focal length provides significant magnification, ideal for sports, wildlife, and portrait photography where distance to the subject is often necessary.
Professional-Grade Construction: Canon’s L-series 300mm lenses are known for their robust build quality, weather sealing, and durability.
Image Stabilization (IS): Many modern Canon 300mm lenses include Image Stabilization technology to reduce camera shake, allowing for sharper handheld shots at slower shutter speeds.
Fast Autofocus (USM): Often equipped with Ultrasonic Motors (USM) for quick, quiet, and accurate autofocus performance, crucial for capturing fast-moving subjects.
Optex Modifications (General Benefits):

Cine-Style Enhancements: Optex often rehouses broadcast lenses to make them suitable for cinema cameras, adding features like geared focus and iris rings for use with follow focus systems, and standardized front diameters for matte boxes.
Mount Conversion: They may convert the lens mount to different professional standards (e.g., PL mount) for compatibility with a wider range of cinema cameras.
Improved Mechanics: Rehousing can sometimes improve the overall mechanical feel and durability of the lens for demanding filmmaking environments.

14mm T2.8
20mm T2.9
24mm T1.5
28mm T2.1
35mm T2.1
45mm T1.5 (Yashica)
55mm T1.3
85mm T1.3
135mm T2.1

Comes in 2 x Hard plastic 6 hole cases with laser cut foam inserts (GL Optics)

The Canon FD GL Optics Rehoused Lenses are vintage Canon FD still photography lenses that have been meticulously rebuilt and modernized by GL Optics for professional cinema use. These lenses retain the sought-after optical characteristics of the original Canon FD glass, known for its pleasing warm tones, smooth rendering, and distinctive flares, while incorporating robust, industry-standard mechanics. Often compared to the classic Canon K35 lenses due to shared visual qualities, the FD lenses typically offer a slightly cooler and more contrasty image and are generally more accessible in price.

CANON 14mm EF F2.8 L II USM
CANON 24mm EF F1.4 L II USM
CANON 35mm EF F1.4 L II USM
CANON 50mm EF F1.2 L II USM
CANON 85mm EF F1.2 L II USM
CANON 135mm EF F2 L II USM
Canon EF (Electronic Focus) lenses are a comprehensive line of lenses compatible with Canon’s full-frame and APS-C DSLR cameras (with a crop factor). Introduced in 1987 with the EOS system, they feature an electronic mount for autofocus and aperture control. The EF mount has a 54mm internal diameter and a flange focal distance of 44mm. This design allows for a wide variety of lens designs and has been a cornerstone of professional and enthusiast photography for decades. While Canon has introduced the RF mount for its mirrorless systems, EF lenses can still be used on EOS R cameras with an adapter, preserving their functionality.