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Pete Ganzel | profile | all galleries >> Tinkering >> Disassembly of the Maxxum 35-70mm f/4 for Repair tree view | thumbnails | slideshow

Disassembly of the Maxxum 35-70mm f/4 for Repair

This unique little lens has a few tricks up it's sleeve. It was made as a companion to the excellent 70-210f/4 and at the time (1985)
must have been conceived as a zooming replacement for a 50mm normal lens.
The central zoom body is a machined metal die casting. The rear element of the front group is a hybrid aspheric, the first of it's kind in a production zoom lens.
The focus helicoid has a beautifully machined aluminum outer portion mated with a plastic lens cell.

The floating rear group houses the aperture which is occasionally contaminated with lubricant, requiring disassembly.
35-70-4_Page_01.jpg
35-70-4_Page_01.jpg
35-70-4 7.jpg
35-70-4 7.jpg
Front Trim remove 001.jpg
Front Trim remove 001.jpg
Front Element Ring 0007.jpg
Front Element Ring 0007.jpg
Front Tube Replace 0066.jpg
Front Tube Replace 0066.jpg
Front Tube align 0069.jpg
Front Tube align 0069.jpg
Marking Tube notch 0064.jpg
Marking Tube notch 0064.jpg
Front Tube Removed 0062.jpg
Front Tube Removed 0062.jpg
Front Element Group 0041.jpg
Front Element Group 0041.jpg
Contact Board 0060.jpg
Contact Board 0060.jpg
Ground Spring 0058.jpg
Ground Spring 0058.jpg
ROMFlex 0054.jpg
ROMFlex 0054.jpg
Removing Mount 0052.jpg
Removing Mount 0052.jpg
Iris Actuator 0045.jpg
Iris Actuator 0045.jpg
Aperture Actuator Train 0005.jpg
Aperture Actuator Train 0005.jpg
Trim Ring Screws 031.jpg
Trim Ring Screws 031.jpg
Trim Ring Removal 0028.jpg
Trim Ring Removal 0028.jpg
Grip Removal 43.jpg
Grip Removal 43.jpg
Encoder Wiper 0042.jpg
Encoder Wiper 0042.jpg
Macro Switch 0039.jpg
Macro Switch 0039.jpg
Macro Switch  Spring 0033.jpg
Macro Switch Spring 0033.jpg
Macro spring 032.jpg
Macro spring 032.jpg
Zoom Screw 0024.jpg
Zoom Screw 0024.jpg
Zoom Ring Removal 0026.jpg
Zoom Ring Removal 0026.jpg
Marking Casting 0010.jpg
Marking Casting 0010.jpg
Zoom Body Removal 0023.jpg
Zoom Body Removal 0023.jpg
Zoom Cam Screws 0021.jpg
Zoom Cam Screws 0021.jpg
Rear Group Remove-Insert 022.jpg
Rear Group Remove-Insert 022.jpg
Iris Pin 0001.jpg
Iris Pin 0001.jpg
Rear Group Disassembly.jpg
Rear Group Disassembly.jpg
Rear Group front half 0006.jpg
Rear Group front half 0006.jpg
Iris Blade arrangement 036.jpg
Iris Blade arrangement 036.jpg
Iris Reassembled 0037.jpg
Iris Reassembled 0037.jpg
AF Drive Gear 0044.jpg
AF Drive Gear 0044.jpg
Reglue Macro Switch 0035.jpg
Reglue Macro Switch 0035.jpg
Aperture Actuator 0051.jpg
Aperture Actuator 0051.jpg
Focus Ring Gear 0014.jpg
Focus Ring Gear 0014.jpg
Front Trim Replace 0009.jpg
Front Trim Replace 0009.jpg