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lens:siruiironstar135mmt2.8
Table of Contents
Sirui IronStar 135mm T2.8
Summary
The IronStar series features 19-20 precision optical elements, including ED, aspherical and HRI components. It delivers sharp, accurate imagery with a subtle vintage glow—where modern engineering meets classic cinematic aesthetics. Available in blue or neutral flare variants.
Tech Specs
| Manufacturer | Sirui |
| Series | Prime |
| Model | IronStar |
| Focal Length | 135mm |
| Max Aperture | T2.8 |
| Min Aperture | T16 |
| Format | Full Frame |
| Image Circle | 46mm |
| Minimum Focus | 31.5in |
| Focus Rotation | 270° |
| Iris Blades | 12 |
| Optical Design | 13/10 |
| Squeeze | 1.5x |
| Front Diameter | 95mm |
| Filter Thread | 92mm |
| Focus/Zoom Rod | none |
| Native Mount | PL, EF |
| Data Protocol | yes |
| Length | 5.6in (PL), 5.2in (EF) |
| Weight | 1.11kg (PL), 1.14kg (EF) |
| Body Telescope | none |
| Body Material | aluminum |
| Focus Drive | manual |
| Iris Drive | manual |
| Zoom Drive | none |
History
Country of Origin: -
Release Date: 2026
Launch Price: $999
Design Revisions:
Service
Notes
Media
lens/siruiironstar135mmt2.8.txt · Last modified: 2026/04/27 01:44UTC by Justin Rhoads