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<blockquote data-quote="RyanDPW" data-source="post: 336693" data-attributes="member: 28790">Hello all,&nbsp; &nbsp; Sorry if this has been asked before or if this is the wrong place for this question.&nbsp; I recently was given a couple Canon FD lenses,&nbsp; one (50mm 1.8 FD) is giving me problems with the aperture.&nbsp; It will not stop down past f/8 when mounted to the adapter but will work fine between f/8-22.&nbsp; My basic knowledge of this lens is when unmounted, it will stay at a middle aperture but when mounted and the lever is pushed it will then open up fully and manual adjustment of the aperture on the lens will now be operational.&nbsp; I &quot;tricked&quot; the lens into thinking it was mounted by pushing down the pins and turning the mount and it opens up at f/1.8 nicely and switches between apertures with ease which rules out any corrosion or sticking of the blades.&nbsp; The adapter I'm using has an &quot;open and lock&quot; feature and when switching it to locked it still will not open up fully. The adapter works perfectly for the other lens.&nbsp; At this point I am kind of stumped as what to do next, any help is greatly appreciated. Below are images of the lens &amp; adapter. Regards,Ryan[ATTACH]103425[/ATTACH][ATTACH]103426[/ATTACH]</blockquote>

[QUOTE="RyanDPW, post: 336693, member: 28790"] Hello all, Sorry if this has been asked before or if this is the wrong place for this question. I recently was given a couple Canon FD lenses, one (50mm 1.8 FD) is giving me problems with the aperture. It will not stop down past f/8 when mounted to the adapter but will work fine between f/8-22. My basic knowledge of this lens is when unmounted, it will stay at a middle aperture but when mounted and the lever is pushed it will then open up fully and manual adjustment of the aperture on the lens will now be operational. I "tricked" the lens into thinking it was mounted by pushing down the pins and turning the mount and it opens up at f/1.8 nicely and switches between apertures with ease which rules out any corrosion or sticking of the blades. The adapter I'm using has an "open and lock" feature and when switching it to locked it still will not open up fully. The adapter works perfectly for the other lens. At this point I am kind of stumped as what to do next, any help is greatly appreciated. Below are images of the lens & adapter. Regards, Ryan [ATTACH=CONFIG]103425._xfImport[/ATTACH][ATTACH=CONFIG]103426._xfImport[/ATTACH] [/QUOTE]

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