The plein air painters group, the Wednesday Group, will be showing an exhibition of their work at The Nature Conservancy in East Hampton. An opening reception will be held on Saturday from noon to 2 p.m., until July 1. The East End Photographers Group will take over Ashawagh Hall in Springs on Saturday for nine days with an exhibition of work by 25 of its members. An opening reception, with music by Job Potter and Friends, happens on Saturday from 5 to 8 p.m.,