Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Nikon DSLR Cameras
Film SLR's
Ugly silvery looking metal fork missing on Zeiss Otus?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Bob Blaylock" data-source="post: 299461" data-attributes="member: 16749"><p>Yes, that's correct. This is how the aperture setting was communicated to pre-AI Nikon cameras. The camera has a pin which engages this shoe, and allows the camera to detect the aperture setting on the lens. Nikon introduced the AI method in 1978, which used a different means of coupling the aperture ring to the camera. The continued to include this shoe, for quite some time, on AI lenses, so that they could be used with older pre-AI Nikons.</p><p></p><p> Here are a few pictures of my F2, wherein I attempt to illustrate the pin that engages this shoe:</p><p></p><p> Here, we see a lens mounted on the camera, with the pin on the camera engaged in the shoe on the lens.</p><p>[ATTACH]85977[/ATTACH]</p><p></p><p> Here's the camera with no lens mounted, and the pin hanging down. Normally, it retracts when the lens is removed; I had to manipulate it a bit to get it out where it would be clearly visible.</p><p>[ATTACH]85978[/ATTACH]</p><p></p><p> And here, I have the DP-1 finder removed, and am holding it to make the pin as visible as I can. On the F2, the meter is built into the finder, which is interchangeable. There were three different non-AI finders, and two AI finders for the F2 body, as well as a few different non-metering finders.</p><p>[ATTACH]85979[/ATTACH]</p><p></p><p></p><p></p><p> Close, but not quite.</p><p></p><p> Non-AI lenses have the solid shoe. AI lenses that have the shoe have the “skeleton” shoe, with the holes in it. The most modern lenses don't have this shoe at all.</p><p></p><p> AI-S was another step after AI. There's a lever on the back of all F-mount lenses, which the camera uses to stop the aperture down, so the aperture is wide open when viewing, but stops down to the selected aperture to take the picture. This was originally intended to be a binary action; depending on what the camera did with this lever, either the lens would be wide open, or else it would be closed to whatever aperture was set via the lens' aperture ring. AI-S made this lever linear and calibrated, so that with the lens' aperture ring set to the smallest aperture, the camera could use this lever to select any aperture setting. I believe this is how all modern Nikon DSLRs control the aperture, and this is why you are instructed, when using a lens that has an aperture ring, to set it to the smallest aperture when mounting it on a DSLR, so that the camera can control the aperture via this lever.</p><p></p><p>[ATTACH]85980[/ATTACH]</p></blockquote><p></p>
[QUOTE="Bob Blaylock, post: 299461, member: 16749"] Yes, that's correct. This is how the aperture setting was communicated to pre-AI Nikon cameras. The camera has a pin which engages this shoe, and allows the camera to detect the aperture setting on the lens. Nikon introduced the AI method in 1978, which used a different means of coupling the aperture ring to the camera. The continued to include this shoe, for quite some time, on AI lenses, so that they could be used with older pre-AI Nikons. Here are a few pictures of my F2, wherein I attempt to illustrate the pin that engages this shoe: Here, we see a lens mounted on the camera, with the pin on the camera engaged in the shoe on the lens. [ATTACH=CONFIG]85977._xfImport[/ATTACH] Here's the camera with no lens mounted, and the pin hanging down. Normally, it retracts when the lens is removed; I had to manipulate it a bit to get it out where it would be clearly visible. [ATTACH=CONFIG]85978._xfImport[/ATTACH] And here, I have the DP-1 finder removed, and am holding it to make the pin as visible as I can. On the F2, the meter is built into the finder, which is interchangeable. There were three different non-AI finders, and two AI finders for the F2 body, as well as a few different non-metering finders. [ATTACH=CONFIG]85979._xfImport[/ATTACH] Close, but not quite. Non-AI lenses have the solid shoe. AI lenses that have the shoe have the “skeleton” shoe, with the holes in it. The most modern lenses don't have this shoe at all. AI-S was another step after AI. There's a lever on the back of all F-mount lenses, which the camera uses to stop the aperture down, so the aperture is wide open when viewing, but stops down to the selected aperture to take the picture. This was originally intended to be a binary action; depending on what the camera did with this lever, either the lens would be wide open, or else it would be closed to whatever aperture was set via the lens' aperture ring. AI-S made this lever linear and calibrated, so that with the lens' aperture ring set to the smallest aperture, the camera could use this lever to select any aperture setting. I believe this is how all modern Nikon DSLRs control the aperture, and this is why you are instructed, when using a lens that has an aperture ring, to set it to the smallest aperture when mounting it on a DSLR, so that the camera can control the aperture via this lever. [ATTACH=CONFIG]85980._xfImport[/ATTACH] [/QUOTE]
Verification
Post reply
Forums
Nikon DSLR Cameras
Film SLR's
Ugly silvery looking metal fork missing on Zeiss Otus?
Top
