Fotodiox x Novoflex x Voigtlander: M-mount adapter cagematch

Started Nov 19, 2013 | Discussions thread
Tom Caldwell Forum Pro • Posts: 35,193
Re: Fotodiox x Novoflex x Voigtlander: M-mount adapter cagematch

turnstyle wrote:

Tuloom wrote:

I've 2 Fotodiox and a Hawk's. All 3 focus slightly past infinity. Hard to imagine one company, producing one adapter that works exactly at infinity with every M mount.

Does Voigtlander really guarantee that?

The Voigtlander I had focused past infinity -- when I contacted them, they basically said I should return it.

I don't know what fraction of a millimeter in adapter width translates to how much ability to focus past infinity -- but I figure if a lens can mount to a body without this sort of consideration, then I would expect a well-made adapter shouldn't need to leave much room for focusing past infinity.

Ah-hah! But lenses are tuned to infinity at final assembly (or at least were) adapters have to take up initial tuning errors and also how much old lenses have gone out of tune over the years.

Presumably Voigtlander assumes a perfectly tuned oem lens that has regularly been re-calibrated or kept with such care as not to be subsequently disgraced.

If the lens is the problem then no matter how many replacement adapters are sent out by Voigtlander none of them will ever be perfect for infinity focus.

-- hide signature --

Tom Caldwell

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow