12-02-2015, 09:47 PM
Mirrorless cameras do not suffer from front or back focus.
They use the image sensor also as AF sensor, in contrast to SLRs which use different sensors for AF and capturing the image. In addition SLRs typically measure the focus with an aperture of f/5.6 (in the geometry of the AF-sensor). Some SLRs at the higher end have some sensors using an f/2.8. The use of these slowis apertures can lead to extra issues when the lens is not well corrected regarding spherical aberation (focus shifts with the aperture.
When using EF lenses via e.g. Metabones, focus might be painfully slow on a mirror less, depending on a number of factors.
They use the image sensor also as AF sensor, in contrast to SLRs which use different sensors for AF and capturing the image. In addition SLRs typically measure the focus with an aperture of f/5.6 (in the geometry of the AF-sensor). Some SLRs at the higher end have some sensors using an f/2.8. The use of these slowis apertures can lead to extra issues when the lens is not well corrected regarding spherical aberation (focus shifts with the aperture.
When using EF lenses via e.g. Metabones, focus might be painfully slow on a mirror less, depending on a number of factors.
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