Talk:Nikon F-mount

message: I failed to confirm the existence of such a lens, but there is a 80-400mm f/4.5-5.6D ED AF VR (without the ultrasonic motor).  See .  —Preceding unsigned comment added by AndersJohnson (talk • contribs) 18:04, 25 January 2009 (UTC)
replies: text: I am pretty sure that you are correct.  There is an AF D version, and an AF-S G version.  Bubba73 You talkin' to me? 06:09, 1 January 2015 (UTC)
thread_title:  80-400mm f/4.5-5.6D ED AF-S VR 

message: I find having the list of lenses in two columns very bad.  I think the list of lenses needs to be organized better.  I think it should be more like List of Nikon F-mount lenses with integrated autofocus motor, but the outer-most headings should be manual and autofocus.  Bubba73 You talkin' to me? 04:33, 30 December 2014 (UTC)
replies: text: I organized it a little better, formatted it better, and added quite a few photos.  However, the Nikkors need to be restructured.  For instance, autofocus, DX, VR, and micro are not mutually exclusive.  Does anyone have ideas?  Bubba73 You talkin' to me? 22:41, 22 January 2015 (UTC)

text: I think they should first be divided into manual focus and auto focus.  Then each of those should be subdivided into prime and zoom.  Then either (1) the ones under autofocus should be divided into non-VR and VR, and then FX & DX, or (2) FX & DX and then subdivide into VR and non-VR.  I think the second option is better.  Bubba73 You talkin' to me? 22:01, 24 January 2015 (UTC)
thread_title: Organization of the list of lenses

message: The new 24mm f/1.8G and 200-500 f/5.6E need to be added.  Bubba73 You talkin' to me? 05:04, 19 September 2015 (UTC)
thread_title:  new 24mm f/1.8G and 200-500 f/5.6E 

message: In the AI description section it is stated: "The AI standard adds a Meter Coupling Ridge to the aperture ring, which encodes the current aperture setting relative to the maximum, and a Lens Speed Indexing Post on the mounting flange, which encodes the maximum aperture itself. The Ridge and Post couple to the camera's light meter."
This statement has error and should be adjusted.  
Regarding the Lens Speed Indexing Post being, as implied by the statement, NECESSARY for meter operation, that is not correct.
The Meter Coupling Ridge BY ITSELF encodes the maximum and set lens aperture to the light meter.  This is accomplished by, depending on the lens' maximum aperture, locating the Coupling Ridge face that is to contact the follower tab (the follower tab is carried by the finder of F2 series cameras and on the body of all later cameras that have a follower) in a various positions, within a small range (arc), about the circumference of the aperture ring.
Bear in mind that the first AI compatible meters, were the removable, metered finders for the F2 camera - the DP-11 (A) and DP-12 (AS), 1977-1981. They have NO provision for aperture information input OTHER than the spring loaded follower that contacts the AI Coupling Ridge of the lens aperture ring.  There is NO transfer of the Lens Speed Indexing Post size to the finder in these AI meters.  To transfer such information would have required a movable, automatically disconnecting mechanical link from the camera body to the finder; no such link ever existed as it was unneeded.  Subsequent models with removable finders (F3, F4, F5), having the follower body-mounted, did not change the basic meter operation.  The F4 and FA did use the Lens Speed Indexing Post input for Matrix metering.
Further, recall that Nikon for some time updated most models of Pre-AI lenses to AI by only changing the aperture ring of the lens - no post or lug was added to the lens as part of the conversion.  It is not needed for basic light metering.
The Lens Speed Indexing Post was for "telling" certain cameras the lens' maximum aperture for advanced metering purposes - but it was not required for basic metering in any camera.  2605:E000:A9A2:600:F58D:6B91:728B:FF88 (talk) 08:23, 24 May 2017 (UTC)
thread_title:  AI Section - Needs Correction 

message: I got detailed info from Nikon about AF-P compatibility. Text is long, so i do a summary. 
Mostly it is an extended version of AF-P Rockwell and many other AF-P - mostly DX - pages and Nikon info. 93.219.150.22 (talk) 19:45, 11 September 2017 (UTC)
thread_title:  AF-P compatibility info from Nikon 

message: I have updated the description of AI and AI-S lenses to reflect the fact that the F4 is not capable of using P or S modes with these lenses(regardless of whether or not it is an AF-S lens). This is reflected in pg. 51 and 54 of the user manual, which specifically states that a CPU lens is required for these modes. I added the reference to the article, but the manual is accessible at http://cdn-10.nikon-cdn.com/pdf/manuals/archive/F4-F4S.pdf  — Preceding unsigned comment added by 136.165.190.71 (talk) 17:56, 14 September 2017 (UTC)
thread_title:  AI and AI-S Compatiblity with F4