Why Mirrorless?

Started Nov 5, 2018 | Questions thread
Chris R-UK Forum Pro • Posts: 21,561
An advantage, a disadvantage and a misconception

One significant advantage that, AFAIK, hasn't yet been mentioned - much simpler camera design. Mirrorless not only does away with the mirror and pentaprism, it also does away with the secondary focus and exposure sensors and subsidiary mirrors that go along with them. In the longer term this has to mean greater reliability and lower manufacturing costs.

A disadvantage that probably won't go away soon - shorter battery life. So you may need to budget for more spare batteries.

A misconception - it looks as if back and front focus errors don't go away with mirrorless, they just become much less frequent because the main cause of such errors has gone - different light paths to the image sensor and focus sensor. A number of higher end mirrorless cameras now include AFMA capabilities and there have been a number of threads recently on the subject in the M4/3 forum for one. Roger Ciccala has pointed out that tiny lens/mount misalignments can cause back or front focusing.

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Chris R

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