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Sony have yet another trick up their sleeve with their SLT (Single Lens Translucent) cameras. These look reassuringly similar to a conventional SLR but have a fixed, translucent mirror inside. This allows most of the light to pass through but reflects around 30% up to an array of focus-detection sensors. This means that, unlike any other SLR or ‘EVIL’ camera, there’s no interruption to focusing from mirror or shutter action. This appears to offer obvious advantages for tracking rapid action in particular. On most cameras focusing in Live View (and when shooting movies) is relatively slow; not on an SLT.

The SLT viewfinder looks superficially like an SLR, but it is electronic. The cameras are slightly smaller and lighter than comparable SLRs, but the absence of a moving mirror makes them quieter, less prone to camera shake and potentially faster. They retain all the other handling advantages of an SLR and should be much better with long lenses than the ‘EVIL’ type. We can’t help thinking that this technology could be what most of the world’s news and sports photographers, in particular, will be using in a few years time. However, it’s not clear, at this early stage, whether SLT cameras totally live up to the promise.