Ahhh so how can I determine the minimum aperture size for any given lens?
If, for example, F5.6 is the maximum, what’s the minimum going (likely) to be?
Don’t worry about it – most DSLR lenses will give you f22 or f32 as a minimum – you would not want to use this unless you really needed maximum depth of field (usually for landscapes). Image quality can actually deteriorate at small apertures (which is one of the reasons bridge cameras don’t have the same minimums) and lenses tend to have a certain f stop that gives the best performance (quite often f8-f11).
As for choice of system – everybody has their favourite but it really depends on you and what you want from a camera in terms of features, value and feel (some may just feel right to you but not to others) – I don’t think there is a bad system out there anymore. Refurbished can be great if they are from a decent supplier and there are also great secondhand bargains (but I would stick to dealers who give a warranty).
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