AE-1P Quest.

[denny_rane]

<p>What happens when you have the camera set on "P" and you take the lens from "A" to manual.?<br>

Thank You</p>

[fred aspen]

<p>With the mode dial set to 'P' and the lens set to a fixed aperture, the 'M' light comes on but the camera continues to operate in P mode. At least that is the way mine operates. </p>

[denny_rane]

<p>Thanks for the info.<br /> When you say "that is the way mine operates".....is that just what it does on the meter, or does the camera function that way.?<br /> That is to say.....have you experienced it with film. That the camera is still in control of the aperture and shutter speed.?<br /> Thanks Again</p>

[paul_wheatland]

<p>Program setting becomes Shutter Preferred once you move dial from A to an f stop of your choice. If left on A and Program the camera selects both f stop and shutter speed.</p>

[paul_wheatland]

<p>Sorry my immediate past post needs correction: shutter preferred should read aperture priority. Shutter Priority takes place when aperture is set to A and you select a specific shutter speed, camera then selects appropriate f stop.</p>

[Member69643]

<p>It is not in aperture priority mode. The camera doesn't have that capacity. With the aperture on anything "A" you are in manual exposure mode. The viewfinder is designed to show you what aperture you should use for the selected shutter speed. With the dial at "Program" you have no selected shutter speed, so it probably defaults to some value or uses the last known set shutter speed, probably 1/1000 sec.</p>

[awahlster]

<p>Read the manual.</p>

[gordon_yee]

<p>For a given scene, assume that (a) the AE-1P's Programmed AE matrix selects an exposure of 1/125 at f/5.6, (b) the aperture ring on the lens is set to the green "A" and © the shutter dial is set to "Program." When you press the shutter release, the camera moves the lens' aperture lever to close the diaphragm while, at the same time, a second lever on the AE-1P restricts or stops the lens' diaphragm from closing beyond f/5.6, after which the shutter curtains are released.</p>

<p>If you turn the aperture ring from the green "A" to any other setting, the lever that restricts how far the diaphragm will close becomes passive and the diaphragm will close to the f/stop selected by the aperture ring. However, the shutter will continue to operate at 1/125 sec., or the speed selected under the Programmed AE matrix.</p>

[Member69643]

<blockquote>

<p ><a href="/photodb/user?user_id=328485">Mark Wahlster</a> <a href="/member-status-icons"><img title="Moderator" src="/v3graphics/member-status-icons/mod.gif" alt="" /></a>, Jul 27, 2015; 07:11 p.m.</p>

</blockquote>

 

<blockquote>

<p>Read the manual.</p>

</blockquote>

<p>I just did. Have you? If so I'd like to know where you found the answer because it isn't in there. Otherwise, I'd like you to shut up and not make ignorant, useless comments.</p>

 

[Gus Lazzari]

<blockquote>

<p>"the shutter will continue to operate at 1/125 sec., or the speed selected under the Programmed AE" <strong><em>Gordon Y.</em></strong></p>

</blockquote>

<p>Gordon is correct. <br /> Basically, except for the red "M" that lights up when you touch the release button, the camera body <strong>doesn't know</strong> that the lens isn't going to be at the correct aperture requested by the "Program" metering. <br /> So, as the red "M" glows, it will fire at a shutter speed that is appropriate for the <strong>recommended</strong> aperture number also glowing in the viewfinder...</p>

[thomas_goehler]

<p>The camera cannot ignore the manually set aperture, so it will use the aperture set by the user, it cannot adjust to the aperture the program mode would suggest. So if we assume the given situation from some posts above (P mode suggesting f/5.6 and 1/125), the camera will use the measured time but it also will use the pre-set aperture - which might now be anything but f/5.6 - resulting in an incorrect exposure.</p>