Category » Teardowns and Disassembly

Nikon 120mm-300mm Teardown

New Items

A Peek Inside the AF-S Nikkor 120-300mm f/2.8 FL ED SR VR


We’ve wanted to look inside the Nikkor AF-S 120-300mm f/2.8 FL ED SR VR lens. When we took apart a Z lens recently, we found Nikon had moved on from their ‘classic’ internal optomechanical and electrical design for a neat, modern design. We were interested to see if newer F lenses would pick that up, or if they would […]

Canon RF 7-200mm Teardown


The Not Very Long Awaited Teardown of the Canon RF 70-200mm f/2.8 IS


Long ago, a visiting Canon engineer put a box on my workbench, grinned, and said: “You’re going to like this.” Then he pulled out a mock-up of the RF 70-200mm f/2.8 IS lens, and my jaw dropped. I’ve been doing this stuff for a long time. My jaw drops very infrequently. My only comment was, “That’s […]

Button Breaks on Camera


Why Side-Mount Buttons and Ports Break on Cameras


We spend a lot of time fixing broken stuff. As sort of a side gig to that, we advise some manufacturers about what is likely to break or is regularly breaking. We offer our input to all manufacturers; some are interested in it, and some don’t give a flying damn. For free, we blog about it, […]


Disassembling the Sony FE 135mm f/1.8 GM


When we optically tested the Sony FE 135mm f/1.8 GM we were mighty impressed. Then I threw up in my mouth a little when I read a couple of reviewers comment on the build quality. Because holding a┬álens gives you not the slightest idea about the build quality. So I was excited when a 135mm […]

Removing Fly from Lens

Geek Articles

Removing a Fly from ‘Weather Sealed’ Canon 70-200mm f/2.8L IS II


I’ve been doing lens stuff for a long time now. Long time. Trust me; it’s hard to remain polite the 843,911th time some newbie goes into hysterics because there’s dust in their lens. Telling them it doesn’t matter a bit, and that all their other lenses have dust they just can’t see ( because different optics magnify […]

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