Optics very valuable but not necessary ... if I could I would give them back.
Test drive revealed an extremely blurred image that is not to be used, starting on tar and then on cobblestones. Despite Firmware Update and enabled SteadyShot function.
Property me then short hand of a saddle clamp (31.8 mm) built an adapter and this to my handlebars (Also 31,8mm) firmly clamped. Today, a 1-hour test drive with the new bracket with off SteadyShot made and see because the camera has not moved a millimeter, the complete hour is in sharp quality, despite asphalt, dirt road, forest paths and gravel (coarse) as an underground.
if Sony wants I do like a technical drawing and send the over.