Canon patent for lens with aperture ring:
Canon 100-400mm f/4-5.6 lens patent:
Sigma 75-300mm f/4.8-6.7 lens patent for Micro Four Thirds:
Panasonic patent for artificially creating a bokeh:
Pentax patent for in-lens image stabilization.
Canon patent for lens with aperture ring:
Canon 100-400mm f/4-5.6 lens patent:
Sigma 75-300mm f/4.8-6.7 lens patent for Micro Four Thirds:
Panasonic patent for artificially creating a bokeh:
Pentax patent for in-lens image stabilization.
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