Canon 200 f/2 manual focus

Hi all,
This question is related to the Canon 200mm f/2.0 lens.
Does focusing work by moving the black rubber focusing ring
if the lens is in manual focus mode AND IF there is no
canon body attached to the end of the lens (i.e. it is not
under current/power)?
Say I want to project a source in an optical lab with this lens onto a detector,
and want to use it in fully manual focus mode.
This did not work with the Canon 200 f/1.8 AF lenses.
Regards,
Bogar

Hello ebiggs,
Thanks for your response.
You say "on external focusing Canon lens" the focus works when set to MF.
The Canon 200 f/2 counts as an "external focusing lens"?
I am asking this, because the manual focusing definitely does not work
on the older Canon 200 f/1.8L USM lens, even when turned to MF mode, but
without a Canon camera attached. So I guess with your definition the 200/1.8 is
not an external focusing lens. When a Canon body is attached to the 200/1.8,
then the MF works fine, but one needs to power up the lens and its CPU so that
it converts the motion of the rubber ring into electronics, and ultimately motion
of internal lens elements.
I understand that this is not a standard use of the lens, so hoping that
Canon afficionados will know this. Clearly, the lens does not change
its outer dimensions while focusing. But one can see the focus changes
when projecting e.g. a landscape on a piece of white paper.
Best regards,
Bogar

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Attachments:
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WP_20131130_11_40_06_Pro.jpg ‏2687 KB

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