SEL90F28G Manual Focus Lock Ring

thingiverse

I printed a autofocus lock ring for the Sony Makro G OSS FE 90 mm F2.8 lens (SEL90M28G). It will effectively prevent the lens from switching to manual focus mode when inserting it into your Underwater Camera Housing. You can use it under your Focus Ring. This way you can toggle AF/MF by pressing a custom Key. Print with PETG for elasticity, fans off and maybe reduce speed, its quite a fragile piece. Print time is only about 10 minutes. The radius in the small indent between focus ring and lens body, as best as I could measure, is 37.9 mm, height 1.8 mm, in case you want to make your own. There is two versions, 1.5 mm and 1.2 mm extrusion depth, 1.5 mm is a little more robust, both fit fine.