Pierro
Senior Member
Just in case anyone still reads this section despite no posts since Sep 2011
Just purchased a TC301 for my 400 / f.35 Ai, and set to Manual + Ap priority, i get F32 in the display, and the aperture ring does not change it.
I have the NON CPU data entered in the menu for this lens, and also have Aperture Ring set in the menu I guess i'm not doing something, but cant figure out what.?
Just going to add this... Mounting the lens without the TC, the correct aperture ( F3.5 ) shows in the display. As stated, the lens FL and max ap have been correctly entered in the Non CPU data Menu. No problem there - moving the aperture ring changes what aperture is displayed.
Soon as the TC is mounted, I get F32 in the display and nothing will change it.
Just for curiosity, I went to the Non CPU data menu and changed this to 800mm F7 ( actually it was F7.1 ) , as these are the correct figures with a 2x TC. But all this did was just change the displayed aperture as F64, and still unable to change aperture using the Ap ring. So that didnt help at all
Just purchased a TC301 for my 400 / f.35 Ai, and set to Manual + Ap priority, i get F32 in the display, and the aperture ring does not change it.
I have the NON CPU data entered in the menu for this lens, and also have Aperture Ring set in the menu I guess i'm not doing something, but cant figure out what.?
Just going to add this... Mounting the lens without the TC, the correct aperture ( F3.5 ) shows in the display. As stated, the lens FL and max ap have been correctly entered in the Non CPU data Menu. No problem there - moving the aperture ring changes what aperture is displayed.
Soon as the TC is mounted, I get F32 in the display and nothing will change it.
Just for curiosity, I went to the Non CPU data menu and changed this to 800mm F7 ( actually it was F7.1 ) , as these are the correct figures with a 2x TC. But all this did was just change the displayed aperture as F64, and still unable to change aperture using the Ap ring. So that didnt help at all
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