Pentax K-mount: types and working principle.

The original "Operation of the K Mount and its Variations", of Dario Bonazza, From http://www.phred.org/pentax/k/ let us look at an auto iris lens mount. .1, look at the non-linear iris contraction lever (stopping-down non-linear operating lever) is how it works. .Set the lens to f8 <! - Content start -> <hr size="1"> <p align = "center" style = "line-height: 120%; margin-top: 0; margin-bottom: 0 ."> <P class=ts1 style="MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 10px; TEXT-INDENT: 0px; LINE-HEIGHT: 120%" align=center> original" Operation .of the K Mount and its Variations ", of Dario Bonazza, </ P> <P class = ts1 style =" MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; MARGIN-BOTTOM: 10px; TEXT-INDENT: 0px .; LINE-HEIGHT: 120% "align = center> From http://www.phred.org/pentax/k/ </ P> <P style =" MARGIN-TOP: 0px; TEXT-JUSTIFY: inter-ideograph; .MARGIN-BOTTOM: 10px; TEXT-INDENT: 30px; LINE-HEIGHT: 120% "align = left> Let us look at an auto iris lens mount. .</ P> <CENTER> </ CENTER> <P style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align=left> 1, look .nonlinear aperture contraction lever (stopping-down non-linear operating lever) is how it works. .Slide the lens set to f8 and the lever to the other side, we see the aperture open; release lever, aperture back to f8. .Then, set the lens to minimum aperture, and now need to move a lever longer distances, but the effect is the same. .</ P> <P style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align=left> Please note the following points: </ P> < .P style = "TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%; mso-list: l3 level1 lfo3; tab-stops: list 41.0pt" align = left> .lever only in the "open" and "set the aperture" moving between two locations. .So when the lens set at maximum aperture, this lever is not moving, this is because the "open" and "set the aperture" is actually the same. .</ P> <P style = "TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%; mso-list: l3 level1 lfo3; tab-stops: list 41.0pt ."align = left> All the shots, no matter how much the maximum aperture, when it is fully open aperture when the lever position is entirely consistent. .</ P> <P style = "TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%; mso-list: l3 level1 lfo3; tab-stops: list 41.0pt ."align = left> changes in the lens aperture ring as a file location in the large aperture position changes and changes in the small aperture, the amount of movement of this lever is different from the. .</ P> <P style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align=left> 2, look at the role of the aperture coupling lever. .It is connected internally with the aperture ring, and moves. .And we can find a different lens (no matter how much the maximum aperture) aperture fully open, the relative position of the coupling rod lens mount is exactly the same terms. .</ P> <P style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align=left> 3, the lens mount to the fuselage up: the .quasi-orange dots (one on each lens and camera body), the lens mount into the body, twist the lens until the locking pin inserted into the slot on the lens, so the lens to combine firmly with the body. .<P Style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 5px 0px; TEXT-INDENT: 30px; LINE-HEIGHT: 120%" align=left> twist of the lens in the process, there are two important things have been .complete: </ P>.