The sturdy, healthy, almost glowing attractiveness of Ruby Loftus, her reddish curls partly tamed by a green hair net, her face punctuated by bright-red lipstick characteristic of the 1940s, her blue overall neatly complementing her red shirt, and her expression intense and concentrated as she screws a breech ring as part of the manufacture of the Bofors gun at a factory in Newport, is a famously captivating image of the Home Front in the last world war.

Photography isn’t looking, it’s feeling. If you can’t feel what you’re looking at, then you’re never going to get others to feel anything when they look at your pictures. Thus Don McCullin, quoted on the information board of a new display at Tate Britain of around 50 black-and-white silver gelatin photographs, chosen and printed by the artist himself. No digital here, the process of the darkroom is under his control.

By anyone’s standards this is an obscure year for the Turner Prize shortlist: you should consider yourself a contemporary art aficionado if you’ve heard of even one of the artists. And if this is indeed the case, that artist is likely to be George Shaw; in recent years his work has featured regularly in group displays at Tate Britain.

Mostly the Venice Biennale passes me by entirely: ho-hum, another tired bit of Brit Art, I think, and turn the page. But Mike Nelson, twice nominated for the Turner Prize, is a terrific artist, too little seen, too odd, too unsettling to have been shown much in the mainstream. His selection is a boost – for him, I very much hope, but even more for the profile of British art. No more cringing when old-hat, old-school Emin or Hirst get wheeled out again, same old, same old.

A retrospective at Tate St Ives can be a poisoned chalice for the major artist. It postpones his or her prospect of a showing at Tate Britain by a couple of decades, and can appear to consign them to the comfort zone of "Cornish Art": the heritage Modernism of Barbara and Ben, Terry Frost, Patrick Heron et al, stuff we love (well, most of us) because it reminds us of being on holiday, but may feel, in our heart of hearts, to be more than a touch minor. On the positive side, Peter Lanyon, who was killed in a gliding accident in 1964, isn’t around to mind, and there’s something to be said for being able to look from one of his lyrical canvases straight out at the surf crashing on Porthmeor Beach and the edge of the windswept, ancient landscape Lanyon regarded as his personal Calvary.