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Canon Files Patent For A 300mm f/4 Lens

Egami (translated) spotted a Canon patent for a 300mm f/4 lens, the possible successor of the (?). The patent suggests that performance fluctuations that are due to temperature changes, and…

EF 40mm f/2.8 STM New Firmware Released

Canon released a firmware update (download here) for the lens. The lens had a problem with AF if pressure is applied to the lens barrel while the lens is mounted…

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