Have multiple Minolta X-700 bodies, the 400mm Minolta MD lens, does lock onto one body but not some of the other camera bodies. Any idea why?

The XG-A, like the other X-series cameras, uses the older Minolta SR lens mount. You're pretty much limited to the SR- and X-series cameras. They will NOT fit the newer Maxxum bodies, for example, which use the newer Minolta AF lens mount.

The lens will fit onto any of the Sony alpha-series digital SLRs.

Tokina makes their lenses with a variety of mounts. A lens with Canon mount, for example, won't fit onto a Nikon. Assuming you get the lens with a Nikon mount, then yes, you can use it with a D70 and with a D700.

If you have manual focus Minolta lenses, then they are not usable on anything other than other manual focus M35mm Minolta SLR's.

If they have the Minolta autofocus mount then they will physically fit onto any of the current range of Sony Alpha SLR's and also the discontinued Konica Minolta digital SLR's, but there will be some issues:-

• there will be a 1.5x magnification factor due to picture cropping caused by the digital image sensor being smaller than a 35mm film frame. As an example, a 70-200mm zoom lens will produce an image equivalent to that of a 105-300mm lens if mounted on a 35mm camera. Lens apertures are not affected by the 1.5 crop factor.
• Earlier Minolta AF lenses relied on the camera body providing the autofocus motor. Later Konica-Minolta and Sony models lack this motor so the lens can only be used in manual focus mode.
  
• If you have a later SSM (SuperSonic Motor) equipped lens and want to use it on an Minolta Alpha/Maxxum/Dynax 9 (different model names in different countries), the camera needs a complete additional circuit board which is no longer available.
• Later Sony Alpha SLR's have far greater electronic communication with the lenses used. Many Minolta lenses will not be compatible and as Sony don't support legacy products there is no fix.

In short, Minolta MD lenses (manual focus) can't practically be used on any modern digital cameras, and Minolta Alpha (autofocus) lenses will physically fit onto a Sony Alpha digital SLR, but will act as if magnified and may not autofocus or work at all on a Sony SLR. But there's no harm in trying.

Sorry there is no absolutely definitive answer for you, but I hope that you now understand why and that you take a moment to rate my reply.

Minolta had two lens mounts. One for manual focus SLR film cameras and one for Auto Focus SLR Maxxum film and digital SLR cameras. Sony uses Minolta Maxxum lens mount.
If the Sigma 400 f5.6 lens was made for Minolta X-700 series, XG, series, XD series, SRT series, then it will not fit on your camera.

The two lens mount systems are incompatible.

You can find adapters on ebay (listed as MD to MA or MD to Dynax) but they come in two varieties:-
The first is a straight converter, it allows the MD lens to attach to your camera, but as the lens is further away from the sensor/film plane than it was designed for you lose infinity focussing so the lens is only good for close-ups.
The second type is more expensive as it incorporates corrective optics to compensate and allow infinity focussing. But by introducing additional (and often suspect quality) optical elements you inevitably have a trade-off in image quality and may experience greater lens flare and chromatic aberrations.

Either way, an adapter leaves the MD lens completely unable to communicate any information to the camera body, and the body is unable to automatically stop the lens aperture down when taking photos. In practice, this means that you must use the camera in fully manual mode, manually focus at wide open aperture and then turn the aperture ring down to whatever you wish to use to correctly meter the light level in order to set the correct shutter speed.

All in all, it's a complete waste of time in my opinion and it would be simpler and far cheaper to obtain a suitable Minolta MD mount body to use with those lenses alone. They go for free/peanuts now, like many 35mm SLR bodies and you can try your local FreeCycle/Freegle groups before shelling out anything. Rare/collectable models aside, no MD mount body should go for more than £10-£20 unless it's guaranteed to have been freshly serviced with new batteries.

As you may be aware, newer Sony lenses will fit your 5D as they use the same mount, but they aren't anywhere near as cheap nor plentiful as MD lenses.

Hope this helps, all that I ask in return is for you to take a moment to rate my answer.

Konica lenses do not fit Minolta cameras. I think you messed something up.

Minolta MC and MD lenses worked on the older manual focus Minolta bodies. They will also work on the Phoenix and Seagull clones of the old Minolta bodies.

The Konica lens should only ever be mounted on a Konica camera.

Your 7000i is now a Minolta paperweight. You need to send your 7000i for repair or replace it.

You could also look on Ebay for another Maxxum body to use your lenses designed for the Minolta A mount. As a rule, camera lenses are not interchangeable. You can use any Maxxum lens on any Maxxum body as a rule, but Minolta changed their flash shoe after the original 7000 series. Flashes that work with your 7000i will work with any subsequent Maxxum.

lightspiritphotography.com

Lens is cross linked in the mount.

You did not say anything about the camera body or the model. Try removing the battery first to see if the auto mount mechanism will release it.

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Hello
The Minolta AF lens will fit and work on most of the Minolta AF bodies (it will depend on exactly what lens it is as to the compatibility), you will also find that it will fit and work with the new range of Sony
digital SLR camera bodies.

The Quantaray lenses are a little bit more difficult as Quantaray make lenses for several different types of camera body, it should mention on the lens what make the lens mount is for. If you post further information about the lenses it might help.

Simple answer...Take your best working lens to a camera store,and ask to test a sony a100 digital camera. ALL Minolta Maxuum auto focus lenses work with the a100. This includes Konica/minolta type also. If you don't have an auto focus lens, it still might work-but you would loose some features, by swaping camera bodies. In the least it would cost you nothing to find out what camera they would work on, and save you enough money to partly pay for the new camera body you want anyway. Shoot a few stills with your lens on the different bodies-after all your not waisting film-until you find one that is good for you. The camera shop might even have an adapter ring for your lens to the camera body of your choice.