3 pm: Photography

More than 60 galleries and private dealers from across the country will display vintage and contemporary photographs for sale at the ninth annual “Photo L.A. 2000” photographic print exposition. The exposition will feature works by well-known artists such as Ansel Adams, Diane Arbus, Manuel Alvarez Bravo and Edward Weston, as well as collecting seminars and lectures by noted photographers William Eggleston, Julius Shulman and Mary Ellen Mark.

* “Photo L.A. 2000,” Santa Monica Civic Auditorium, 1685 Main St., Santa Monica. Featured lecturers include William Eggleston at 1 p.m. Friday; Julius Shulman at 10 a.m. Saturday; and Mary Ellen Mark at 10 a.m. Sunday. Collecting seminars will be held at 10 a.m. and 1 p.m. Friday; 10 a.m. Saturday and Sunday. General viewing hours: Friday, 3-8 p.m.; Saturday, noon-8 p.m.; Sunday, noon-6 p.m. $12 or $20 for all three days. (323) 937-5525. A benefit preview hosted by director Gus Van Sant will be held for DIFFA from 6-9 p.m. Thursday. Call (310) 652-6601 for information.

12:15 & 3 pm: TV Museum

As Lucy and Ricky Ricardo in the classic sitcom “I Love Lucy,” Lucille Ball and Desi Arnaz were one of television history’s most beloved couples. Beginning Friday, the Museum of Television & Radio will salute the team with a special screening series titled “The Unseen Lucy and Desi: Treasures From the Vault.” The segments of rare footage will include the pair shown as guests--both in and out of their Lucy and Ricky characters--on other television shows. The screening series, which will run through March 5, will be divided into three packages: “The Early Television Years” (Friday-Jan. 30; Feb. 15-20); “Lucy on the Rise” (Feb. 1-6; Feb. 22-27); “The Later I Love Lucy Years” (Feb. 8-13; Feb. 29-March 5).

* “The Unseen Lucy and Desi: Treasures From the Vault,” the Museum of Television & Radio, 465 N. Beverly Drive, Beverly Hills. Wednesdays-Sundays, 12:15 and 3 p.m., with an additional screening Thursdays, 7 p.m. Through March 5. $6; students and senior citizens, $4; under age 13, $3. (310) 786-1000.

8 pm: Pop Music

The Hawaiian slack key guitar genre has become increasingly popular in recent years, and now comes the first slack key supergroup. Hui Aloha, which headlines two nights at UCLA’s Freud Playhouse, features Dennis Kamakahi, his ukulele-playing son David, George Kuo and Martin Pahinui.

* Hui Aloha, Friday and Saturday at Freud Playhouse, UCLA, 8 p.m. $30. (310) 825-2101.

8 pm: Theater

L.A.’s much-lauded playwright Justin Tanner, who usually directs his own work at his Cast Theatre home base, will helm the premiere of Angelo Michael Masino’s new play, “Mary’s Dream.” Inspired by “Christ in Concrete,” the book by Pietro de Donato, it’s about a bricklayer’s attempts to create a better life for his wife and unborn child.

* “Mary’s Dream,” Cast Theatre, 804 N. El Centro Ave. Fridays-Saturdays, 8 p.m.; Sundays, 7 p.m. Ends Feb. 20. $15. (323) 462-0265.

9 pm: Pop Music

It’s hard to find a survey of L.A. rock-watchers that doesn’t mention the BellRays as one of the best bands ever to soak a Southland stage with sweat. Their continuing presence in small clubs--including Spaceland on Friday--is a reflection not of any musical shortcomings but of the fiery band’s rigorous anti-industry attitude.

* The BellRays, Spaceland, 1717 Silver Lake Blvd., Los Angeles, 9 p.m. $8. (213) 833-2843.

7:30 & 9:30 pm: Jazz

In “Dizzy: The Man and the Music,” one of the greatest jazz men of the 20th century will be remembered by an all-star, cross-generational collection of Gillespie associates and devotees. Those gathering to pay tribute include trumpeter Roy Hargrove, trombonist Robin Eubanks, saxophonist Don Braden, pianist Mulgrew Miller, bassist John Lee and percussionist Ignacio Berroa.

* “Dizzy: The Man and the Music,” Founders Hall, Orange County Performing Arts Center, 600 Town Center Drive, Costa Mesa, 7:30 and 9:30 p.m. Also Saturday, 7:30 and 9:30 p.m.; Sunday, 1 p.m. $36 to $42. (714) 556-2746.

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Freebie: Before the Los Angeles Philharmonic, conducted by Roger Norrington, brings Michael Tippett’s oratorio, “A Child of Our Time,” to the Dorothy Chandler Pavilion over the weekend, Norrington and the orchestra, assisted by the L.A. Master Chorale and others, present this most-performed Tippett work at Wilshire United Methodist Church, 4350 Wilshire Blvd. The 8 p.m. program begins with traditional spirituals and gospel songs. (323) 931-1085.