Table of Contents
Cooke Varokinetal 9-50mm T2.5
Summary
The Cooke Varokinetal 9-50mm T2.5 is a cine zoom lens produced by Taylor-Hobson/Cooke for the 16 mm format. Introduced during the mid-1960s–1970s era, the Varokinetal series represented Cooke’s effort to deliver compact, high-speed zooms tailored for documentary, television, and independent film production.
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Tech Specs
| Manufacturer | Cooke |
| Series | Varokinetal |
| Model | - |
| Focal Length | 9-50mm |
| Max Aperture | T2.5 |
| Min Aperture | T22 |
| Format | 16 format |
| Image Circle | - |
| Minimum Focus | 28 in. |
| Focus Rotation | - |
| Iris Blades | - |
| Optical Design | - |
| Squeeze | none |
| Front Diameter | 121mm |
| Filter Thread | - |
| Focus/Zoom Rod | - |
| Native Mount | PL |
| Data Protocol | - |
| Length | 1479g |
| Weight | 2700g |
| Body Telescope | none |
| Body Material | Aluminum |
| Focus Drive | Manual |
| Iris Drive | Manual |
| Zoom Drive | Manual |
History
Country of Origin: United Kingdom
Release Date: c. 1975
Launch Price: ~$10,000
Design Revisions:
Service
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Shim file: Cooke 9-50mm shim
Contributed by Duclos Lenses
This section restricted to Duclos Staff users.
Service Manual: Disassembly/Re-assembly
Full CLA: 12-14 hrs.
replace zoom followers: use followers from TLS # K501-1314
Iris dis-connected: 2 hrs.
oil in mechanism most common issue. make sure you NUMBER IRIS BLADES IN ORDER for reassembly, otherwise may not be perfectly round. If bokeh is not round, swap blades around. Do not grease internal iris mechanism except for very light Molybdenum on iris pin slot.
…end of Staff section