Cooke / Spherical Prime
Cooke S8/i Full Frame Plus
Full-frame Cooke primes with T1.4 available across all twelve focal lengths. The series pairs a fast aperture with a 270-degree focus rotation.
Representative lens illustration. Details simplified. Not to scale.
01 / The lens
Optical Profile
- Lens type
- Spherical Prime
- Focal range
- 18–135mm
- Max. aperture
- T1.4
- Coverage
- Super 35 / Full Frame
Full Frame. The 18mm is optimized for 43.3mm coverage; other focal lengths are specified for 46.3mm.
- Mounts
- PL / LPL
- Image circle
- Not established
GLM sourcing
Ask GLM about sourcingGLM can use this profile as a starting point for lens strategy, sourcing, or adjacent package recommendations.
GLM editorial assessment
Rendering notes
These are qualitative selection notes. Evaluate the exact lens version, focal length and aperture on your intended camera.
Use cases
- Low-light full-frame drama
- Full-frame prime packages needing a consistent T-stop
Tradeoffs to test
- The 18mm is optimized for 43.3mm coverage, while the rest are specified for 46.3mm.
- The 18mm and 21mm are supplied with support brackets and weigh 3.4–3.5kg.
02 / Before the shoot
Plan a lens test
Test the focal lengths and apertures you expect to use. Check the center and edges, move a light across frame, and pull focus through your planned working distances. Include skin tones and the lighting conditions from your shoot.
03 / Further reading
Sources
Consult the original documentation for the specific focal length, mount and lens version. GLM's rendering notes and use cases are editorial interpretation.