1. “The Perfect Medium: Photography and the Occult”
A century’s worth of (often hilariously fake) attempts to document paranormal phenomena.
• Metropolitan Museum of Art, 1000 Fifth Ave., at 82nd St., (212-535-7710).Through December 31.
2. Bill Armstrong
This contemporary photographer creates apparition-like portraits.
• ClampArt, 531 W. 25th St., nr. Tenth Ave. (646-230-0020). Through October 22.
3. “Photographing the Invisible”
Nineteenth-century photographs from the collection of photographer and historian Cyril Permutt.
• Keith De Lellis, 47 E. 68th St., nr. Madison Ave. (212-327-1482). Through November 15.
4. “Twixt Two Worlds”
Spirit photographs, art objects, and ephemeraSo from the collection of the sleight-of-hand master Ricky Jay.
• Christine Burgin, 243 W. 18th St., nr. Seventh Ave. (212-462-2668). Through December 10.