Campbell followed up an opening round 62 ' his career best ' by going 4-under through his first 11 holes on Friday at St. Leon Rot before darkness forced the suspension of play sometime about 8:50 pm local time.
At 14-under for the tournament ' which underwent a 7-hour rain delay on Thursday ' the New Zealander is a full five shots clear of the field.
Eduardo Romero, who completed 10 holes on Friday, is at 9-under, while Greg Owen and Ernie Els each made it to minus-8 before the horn sounded. Colin Montgomerie is one shot further back at 7-under through 11 holes, while playing partner Woods is nine off the pace at minus-5.
Recording five birdies over his first eight holes of the day, it appeared that Campbell might even have taken his play to a higher level, but a bogey-5 at the par-4 9th derailed him just slightly.
Nevertheless, he is playing to a magnificent level and has made birdie on 13 of his opening 29 holes this week.
Likewise, Montgomerie got off to a fast start on Friday, besting Campbell by a shot at 5-under through 11 holes. The seven-time Order of Merit champion is looking for his first victory of the season.
Woods is searching for his second title this year on the European Tour. After successfully claiming the season-opening Johnnie Walker Classic, he nearly won again at the Dubai Desert Classic, but was done in with a double-bogey at the 72nd hole.
Friday, the American star had reached the 6-under-par mark, but dropped a shot with a bogey at No. 10.
Ian Woosnam also made a few bogies of his own during Day Two.
Woosnam ' one of the few players to complete his second round on Friday ' could do no better than an even-par 72 following his opening 66.
At 6-under for the tournament, Woosnam blames a stubborn putter for his current struggles on the course.
I am determined to get it right with the short putter after using the long one on and off for the last two years, he commented.
Its a case of getting my right arm bent and getting a better pull and push action with the right hand. Ive also been standing too upright and its going to take a while to get used to it again.
Better be sooner rather than later for Woosnam. Or anyone, for that matter. At this point in the game, Campbell holds the tournament in the palm of his hand.
Players will embark back onto St. Leon at 8:30 Saturday morning to complete their second rounds, upon which time they will attempt to finish Round Three in the afternoon.
Full-field scores from the Deutsche Bank - SAP Open