Table of Contents
Fujinon Cabrio ZK 85-300mm T2.9-4
Summary
FUJINON ZK3.5×85 is a telephoto zoom lens with a frequuently-used focal length covering from 85 to 300mm.Thanks to the detachable servo drive unit on the ZK series, the lens can be operated in the same manner as a traditional broadcast ENG-Style lens and accessories. Furthermore, with the servo drive unit removed, traditional cinema manual, or external cine motors for zooming and focusing operation is also available for all models of this series. With the latest optical simulation technology and high precision large diameter aspherical elements, it has achieved both high optical performance and a lightweight compact body of 2.9kg. Thanks to high resolution from the center to corner, high image quality without image distortion will be exhibited on the large screens of movie theaters.
Tech Specs
| Manufacturer | Fujinon |
| Series | Cabrio |
| Model | ZK |
| Focal Length | 85-300mm |
| Max Aperture | T2.9-4 |
| Min Aperture | T22 |
| Format | Super 35 |
| Image Circle | 31.5mm |
| Minimum Focus | 48 in. |
| Focus Rotation | 200 |
| Iris Blades | 9 |
| Optical Design | - |
| Squeeze | none |
| Front Diameter | 114mm |
| Filter Thread | 111mm |
| Focus/Zoom Rod | - |
| Native Mount | PL |
| Data Protocol | LDS, Cooke /i |
| Length | 9.8 in. |
| Weight | 3085 g |
| Body Telescope | none |
| Body Material | Aluminum |
| Focus Drive | Servo |
| Iris Drive | Servo |
| Zoom Drive | Servo |
History
Country of Origin: Japan
Release Date: -
Launch Price: -
Design Revisions:
Service
This section restricted to Duclos Staff users.
Service Manual: Disassembly/Re-assembly
Screws: Fujinon
Full CLA: 18-20 hrs.
Type I (old): Fujinon above 19-90, servo says SAF, S/N on FER
Type II (new): 19-90 above Fujinon, servo says SAFB, S/N on iris ring
iris only: 3 hrs.
slip focus scale: 1 hr.
remove beauty ring, FER (lifts off towards front), and nitotape holding scale to focus cam (mark before removing focus scale completely)
C/A front optics only: 4 hrs.
Adjust zoom curve:
0.003“ is about 75 microns, I think the mid range spec for the 1st gen 19-90 was about 30 microns. I would try overhauling the zoom cam first (cleaning/changing grease and rollers) and try to bring down this error. If unsuccessful there are spacer washers under the first zoom cell that can be changed. On our collimator if the error is positive we add spacer thickness, if negative we subtract.
Re-installing and initializing servo:
https://www.youtube.com/watch?v=weizqXDKuP0
back focus ring adjustment: 1-3 hrs.
…end of Staff section