So I am hoping you will take pity on a noob who is confused by the Alpha & E mount systems and adapters. What I think I understand: Older Minolta AF lenses (e.g. the Maxxum series) are A mount and will work FF on an A7 with the LA-EA3 and 4 adapters. Is there any advantage to the LA-EA4 on the original A7? Are there any alternative adapters? Same for other A mount lenses (Sony lenses for Alpha series SLR, 3rd party Sigma etc). Or are some of those A mount lenses for the APS-C Alphas, and those will give cropped image on FF? What about the E-mount lenses? I think that these will all mount direct to A7 without adapter, but how to differentiate lenses for APS-C Sonys such as NEX, 5000 & 6000 series? (that will not give FF on A7) And I also see some lenses with identification as SALxxxx..... Confused...... And very grateful for some guidance.