In particular, there are lots of Pentacon Six (P6) mount lenses available at modest prices, and adapters are available (if somewhat expensive) for most dslrs.
Without multi-coating, lenses are more susceptible to flare - but flare is rarely a problem with old lenses.
There are several major issues: Back focus: the mounted distance between the rear of the lens and the sensor of dslr body must be no longer than that of the lens design in order to reach infinity focus.Dust is most visible at small apertures, so it also can help to avoid using f /16 and higher for your photos if you're not 100 sure your sensor is clean.You'll want an EVF that's very bright, with pretty rich color and decent resolution (at least 640 x 480 pixels, sometimes called 921,000 dots, since bigger numbers look cooler).These problems are most easily discovered by actually taking the lens off the camera, looking at and through the glass, and working the various controls.Note that the Canon EF/EF-S adapters with a mechanical aperture iris built-in do not work with most lenses - the iris just vignettes.That was ok with negative film that had huge exposure latitude, but light falloff is much more serious with digital sensors that have smaller dynamic ranges.The only downside is that you're looking at an electronic screen rather than an optical image.
I'd like to see these new pellicle mirror evil/dslrs have a mechanical mirror lock up switch, which understandably would require disabling the phase-detect focus sensor.
But fortunately they have never been terribly visible problems for any lensdslr combination that I've tested.
For example, although the vast majority of the old lenses I've tested were designed for full frame, I have seen only a few 30 year-old lenses under 50mm that can compete at maximum aperture with the corner sharpness of a typical modern wide-angle "kit" zoom.However, here are a few general rules for buying old lenses online.This would also partially remediate the problem of having too narrow a mount; for example, the rear element of the modern Samyang 85mm f/1.4 is too tight a fit for a chip to be mounted easily, so this lens gets no focus confirmation nor SSS.Despite this, trap focus can be implemented by enabling focus priority and keeping the camera in autofocus mode, thus letting the focus motor spin unproductively while you manually focus the lens mounted using a chipped adapter.Similarly, even if the glass theoretically could clear the mirror, Canon FL/FD and Minolta MC/MD mount lenses expect their mounting tony hawk underground 2 cheats all levels flanges to be closer to the sensor than most dslrs can accommodate, so they cannot be mounted without major surgery.With people, we often used face recognition, as it tends to be the best way to keep autofocus on a person.The phase-detect autofocus trick is not a big deal with manual-focus lenses, but the Nikon 1's high-speed capture features should work well with old glass.A teleconverter can't improve image quality for all lenses it might be used with, but theoretically a reducer can concentrate rays such that resolution, chromatic aberration, etc.Glassless Adapters Glassless versions of the teleconverting adapters that contain glass are available, but the glass was needed to make the lens image reach the extra distance to your sensor.In other respects or with other types of lenses, the glass adapter seems to slightly amplify defects of the base lens, and I have found the impact on image quality to be relatively minor and often negligible.