Question about Pentax *ist DS Digital Camera
If it is a Pentax bayonet mount lens, switch the DS to "M" mode, dial in the aperture you want on the lens ring, push the AEL button. The camera stops the lens down, takes a reading and adjusts the shutter speed accordingly.
Posted on Sep 08, 2005
They will - fully open in Av mode, and with any aperture in manual mode - after you allow the Ds through the custom settings menu to use aperture settings different then "A". To choose correct exposure with such a lens in manual mode you can use the AE-button - it stops down the aperture, reads the EV and sets the shutter speed according to the chosen aperture.
Posted on Sep 08, 2005
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