Table of Contents
Fujinon 18-55mm T2.9 MK
Summary
“FUJINON MK18-55mm T2.9” achieves high optical performance and low distortion with T2.9 speed across the entire zoom range. With MK50-135mm, it covers standard 18 to 135mm focal length for cinema production. Super 35mm / APS-C sensor compatibility and E-mount dedicated design have led to an ultra-compact & “less than 1kg” lightweight body, and excellent cost performance. It suppresses “focus shift and optical axis shift while zooming” and “Lens breathing”. Also, it features three fully manual lens rings for focus, zoom, and iris with 0.8M gear pitch and a 200° focus rotation angle for sophisticated operability.
Tech Specs
| Manufacturer | Fujinon |
| Series | - |
| Model | MK |
| Focal Length | 18-55mm |
| Max Aperture | T2.9 |
| Min Aperture | T22 |
| Format | Super 35 |
| Image Circle | 28.5mm |
| Minimum Focus | 34 in. |
| Focus Rotation | 200 |
| Iris Blades | 9 |
| Optical Design | - |
| Squeeze | none |
| Front Diameter | 85mm |
| Filter Thread | 82mm |
| Focus/Zoom Rod | - |
| Native Mount | E, MFT |
| Data Protocol | none |
| Length | 8.1 in. |
| Weight | 998 g |
| Body Telescope | none |
| Body Material | Composite Polymer |
| Focus Drive | Manual |
| Iris Drive | Manual |
| Zoom Drive | Manual |
History
Country of Origin: Japan
Release Date: -
Launch Price: -
Design Revisions:
Modifications
Available in Micro 4/3 mount, Sony FZ mount, Canon RF mount, and Leica L mount via third-party modifications.
Service
This section restricted to Duclos Staff users.
Service Manual: Disassembly/Re-assembly
duclos_rf_mount_conversion_for_fujinon_mk_zooms_2_.pdf
Full CLA: Send to factory
the majority of the exterior and optical components are plastic, only the chassis is aluminum.
Everything comes out the front of the lens, no shortcuts.
All MKs are sent to the factory for repairs
Clean front optics: 4-6 hrs.
Clean outer housings: 8 hrs.
Re-collimate (wide end): 1-2 hrs.
1 hr for wide end
2 hrs for tele end.
To access the tele end adjustments: remove front ring and peel off tape around focus scale, adjust and secure with tape. focus stop is on scale not cam.
Re-align Iris Index ring: 1 hr.
The External Iris Ring has multiple slots, which can cause the iris index to be misaligned. Make sure it goes in the right slot.
Mount Conversions: (see repair guide for details)
MK-RF: # 38204250
https://www.ducloslenses.com/pages/fuji-mk-rf-conversion
MK-FZ: # 38204181
https://www.ducloslenses.com/products/sony-fz-mount-kit-for-fujinon-mk-zooms?_pos=2&_sid=d418c0cf5&_ss=r
MK-MFT: # 38204230
https://www.ducloslenses.com/products/mk-mft-kit?_pos=17&_sid=a9152b148&_ss=r
MK-EF: Not possible
MK-PL: Not possible
Re-install original E-mount: 1 hr.
…end of Staff section