Re: Nikon/Canon ring ...
- On Wed, 28 Feb 2007 10:52:46 -0700, Andrew Crawford wrote:
> If I understand correctly, you are unlikely to see an adapter that willActually, very few Nikon lenses still use this in-body drive system;
> allow Nikon lenses to auto focus on Canon cameras, barring a major
> development in making motor miniaturization. I believe Canon uses an
> electronic connection between the lens and body to drive a motor in the
> lens, while Nikon uses a gear system to focus their lenses from a motor
> in the body.
most have their own focus motors which are addressed electronically.
Only a few currently produced lenses do, the widely regarded 50mm f1.8
and the 10.5mm fisheye among them. Their newest consumer camera
completely lacks the body drive. Lenses where focus isn't a priority
(such as this one, with its huge depth of field), often omit the motor
to save space and price.
- If you search ebay, or my post a few days ago you will see that there
is a adapter that does give focus confirmation, it works well with my
1Ds and the 10.5. I guess you might not need it if you lock the focus
ring in place, but it is very easy to move it when taking the photo's.
--- In PanoToolsNG@yahoogroups.com, "dmgalpha" <dmgerman@...> wrote:
> --- In PanoToolsNG@yahoogroups.com, Andrew Crawford <yahoo@> wrote:
> > Alex wrote:
> > > I bought one from fotodiox.com and it's great! Used mostly with a
> > > Micro-Nikkor
> > > on my 400D for extremely sharp closeups of small items.
> > > No focus confirmation though. Apparently if you search eBay
> > > versions of the adapter which have attached a small contact
> > > and some
> > > electronics, whereby the AF indicator displays when proper focus is
> > > achieved.
> > > To my knowledge there are no adapters allowing AF as such with
> > > lenses on EOS bodies.
> > > Alex
> > I second the recommendation for the fotodiox adapter. I am using one
> > with the Nikon 10.5mm on my Canon Rebel XT and, it is working well.
> > If I understand correctly, you are unlikely to see an adapter that
> > allow Nikon lenses to auto focus on Canon cameras, barring a major
> > development in making motor miniaturization. I believe Canon uses an
> > electronic connection between the lens and body to drive a motor
> > lens, while Nikon uses a gear system to focus their lenses from a
> > in the body.
> I believe the original poster was referring to focus confirmation,
> which these adapters do not give.
> There is a M42 adapter known as the dandelion that provides focus
> In the case of the 10.5 this is not a problem. The lens focuses sharp
> from 1 would say 1m to infinity at approximately F8.
> Has anybody tried the manual focusing screens from Canon? They can be
> mounted on the series 1, 3, 5, and I have seen hacks to make them fit
> in a 20d.