Before such Adaptall mounts were available, there was a workaround.
Note I said the " made " one, not they " make " one, since they stopped making it a long time ago.
The distance from the mounting flange on the back of the lens to the film (or digital sensor) is known as the "Flange Back nl ebooks diana gabaldon or the "Flange to Focal Plane" distance, or sometimes as the "Flange to Film" distance.
This plane runs exactly in parallel to the film or sensor in the camera.In these cases, it is rare for any of the camera's AF points to coincide exactly with the photographer's choice of focal point and, all too frequently, the focusing point covers too much of the subject with a large extension of depth, which means that.T-mount adapter rings (which attach to the camera) are cheap and available for just about any camera.Advantages of AF systems, autofocus systems have undergone major developments since they were first introduced in cameras in the 1980s.I've never actually seen a lens with the original T1 mount - or a T1 mount adapter - though I'm sure they exists.They are now very hard to find.Focusing, focusing the lens is another issue.The.4 is 2/3 stop faster though.However APS-C Sensor EOS bodies which can take EF-S lenses all after the EOS 10D) can take adapted Pentax-K lenses without the need to remove the aperture coupling lever.For any subject that is either not actively moving away from the photographer's position or that is set to move into the trap focus after careful pre-focusing, better results can be achieved with careful manual focusing.Precision focusing, one of the key links in the chain of successful image rendering is the precision with which the lens focuses on the main subject.
If you have a large investment in quality FD glass it might be worth looking for one.
The first is fully manual, so you can manually adjust the aperture at any time.The answer is a qualified "yes" in many cases.Almost 360 degrees in the case of the Makro-Planar T* 2/100 from infinity to the close-up limit.44 m a wealth of available settings for the all-metal unit and none of the constraints caused by the need to turn a focus motor, these lenses.If you have one of the bodies with this microswitch and your adapted lens causes the camera to freeze you have to remove a small part of one of the bayonet flanges in order to avoid tripping the switch.T-Mount Before Tamron developed their Adaptall mounting system they introduced the simpler T-mount so that any T-mount lens could be attached to any dslr.The first is to get an Adaptall mount for either Nikon or Contax.
They tend to be low cost "generic" lenses.
In many of the Nikon models (e.g.
For example the two Pentax 50mm lenses (50/1/4 and 55/2) I've tested were really no better performers than the Canon EF 50/1.8.