One picture, dated 1963 and called "Christmas Eve," is of a couple dressed in white, the woman barefoot, their bodies almost mirroring each other, both of them smiling as they look down at each other's feet, their heads almost touching. It is sweeter than anything by Fink and less envious or astonished (or maybe, as you say, more involved, more belonging among its subjects) than anything by Winogrand.

The other, "Dance The Twist," from 1965, is one of the best and funniest dancing pictures I've seen. There are participatory figures in the background, but the main action is a couple in the foreground. The man has his back to the camera, and he is deep in one of those Twisting squats that I couldn't do then, let alone now.

His body language, with the flap of his suit jacket elongated as he thrusts out his left leg, reminds me of those Lartigue pictures of the guys in the open wheel race cars, time smeared as they speed by. The Twist photo is not blurred in that way; it just feels like a warp.

Also wonderful is a picture called "During The Great Heat," from 1976, in which Sidibe seems to have waded into a lake or body of water to photograph an archipelago of 10 people up to their necks in the water, cooling off.

They are all entwined, arm in arm. All you see is their heads, one woman's head and shoulders--and one guy's toes, bobbing in the water. You can see relief and pleasure on a few of their faces, but surprisingly not on all of them.

The rest are looking at Sidibe with that combination of formality and disarming ease that, as you note, is so striking in his studio portraits.

The link is both lines of the following:

http://www.artnet.com/Artists/ArtistHomePage
.aspx?artist_id=15531&page_tab=Artworks_for_sale