LIFE, 2 December 1966, pg. 41

On Gemini XII Aldrin performed the first completely successful spacewalk in human history.

Lovell took this great photograph from the window of the Gemini spacecraft with the Maurer space camera and its 80mm lens. The L-band antenna of the Agena and the EVA umbilical cord are visible near Aldrin. 

During the spacewalk, Aldrin attached a tether to Agena 12 for a two-vehicle rotation maneuver. In his right hand is one of the Velcro handholds that allowed him to move like a human fly around the outside of both craft. (Mason, pg. 120)

“Working hard at the Agena work station, ‘Buzz’ Aldrin did not know when I took this picture of him through the left-hand window of Gemini XII. It occurred during his second trip outside and Buzz was already establishing new milestones in man’s ability to complete useful tasks in the void of space.The successful completion of the 5 1/2 hours of EVA during the Gemini XII mission helped to pave the way for future space missions.”

—James Lovell (Cortright, pg. 183)

From the mission transcript during the EVA:

043:07:30 Lovell:

Listen. While you’re resting, why don’t I just try and get a picture on the 70mm (Maurer camera) here?

043:07:35 Aldrin:

All right.

043:07:40 Lovell:

We are ahead of the game anyway so - I know that you’d like to have your picture taken.

043:07:54 Aldrin:

Well, let me batten down here. Have you got the camera out?

043:07:59 Lovell:

Yes.

043:08:01 Aldrin:

Okay.

043:08:04 Aldrin:

There. How’s that?

043:08:06 Aldrin:

Did you get it?

043:08:07 Lovell:

Just stand by.

043:08:28 Lovell:

One more ... [...]

043:22:12 Lovell:

Okay. This Maurer camera sure beats the Hasselblad for taking pictures in EVA. Here I can get up to the window.