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Forum: Canon, Nikon, Sony, and Other Camera Brands
08-15-2014, 06:06 PM
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sounds like a loss of spring tension in the adapter, and it's easily fixed... you can make the lens mount so tight that you can barely screw the lens on.
it's probably the cheap adapters with the cut metal slits you are referring to... put a small screwdriver in the slit, and twist it slightly, opening up the slit... if you leave the lens mounted to the adapter, it probably won't lose tension.
there are a couple of references to lens tests, that claim that a "crooked" adapter lowers resolution... in a perfect lens test, the sensor is exactly parallel with lens, which is exactly parallel with the chart being shot... but when the lens is tilted slightly, it's out of alignment with the chart and the sensor... the focal plane is not parallel.
would anyone claim that the canon t/s 24mm lens loses resolution when it's tilted? probably not... but people are willing to claim that adapter-induced tilt can lower resolution, which is not logical.
---------- Post added 08-15-2014 at 06:17 PM ----------
i don't think that is true.
"The third optical component in the telescope system is the eyepiece. It is a complex magnifying lens used to view the image formed at the focal plane. - See more at: How to Align Your Newtonian Reflector Telescope
the sensor doesn't do any magnifying at all, it's not part of any optical system.
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Forum: Canon, Nikon, Sony, and Other Camera Brands
08-15-2014, 09:31 AM
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that is not correct.
the only adapters you should be using don't have any glass, so of course they can't alter the optical properties of the lenses.
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Forum: Canon, Nikon, Sony, and Other Camera Brands
08-13-2014, 08:31 PM
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i think that there are a metric ton of legacy autofocus lenses available for the a6000, if you get the sony adapter that has the electrical connections... lea2?
Alpha A-mount and E-mount lenses guide
the evf should be wysiwyg, like the a7r, but smaller, with lower p.q... but no more tweaking the aperture just to set the focus, you can focus at the same aperture you shoot at.
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