On 2015-07-14 04:11, Eric Stevens wrote:
Does anyone have knowledge or experience of these? How good are they?
(For a particular value of 'good')

With some exceptions most people who buy reflex's relegate them to a
shelf at some point after the initial blush of pleasure wears off. They
are usually (always?) manual focus too ... which can be a challenge for
the wearier eyes out there.

That said, with today's low noise sensors, f/8 is not the barrier to
some photography that it used to be. (Shooting in the woods, for example).