| 11. | Power contacts on the lens mount were introduced to enable Pentax's SDM DNG ).
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| 12. | The X-mount lens mount has a short flange back distance of just 17.7 mm.
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| 13. | The lens mount design is an important issue for compatibility between cameras and lenses.
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| 14. | An infrared filter was mounted just behind the lens mount.
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| 15. | In 1982, Cosina began to manufacture lenses in a variety of SLR manufacturers'lens mounts.
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| 16. | And to give them flexibility, one or two versions also had lens mount adapters.
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| 17. | The special Calypso lens mount is of the bayonet variety with an O-ring sealing.
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| 18. | The lens mount is a passive e-mount with Canon EF or Nikon F mount adapter.
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| 19. | Adapters may not be available to bridge every combination of lens mount and camera mount.
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| 20. | The manufacturers of these lenses have reverse engineered the electronics of the EF lens mount.
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