"pose together for" is correct and usable in written English.
You can use it when two or more people are standing in a group for a photo. For example: "Let's pose together for a picture!".
One measure of their differences was the challenge of getting them to pose together for a photograph.
She and her husband continued to pose together for pictures, for the clinic, as late as 1962, which was the next time that any significant publicity appeared about Tracy and Hepburn.
Katy Perry and John Mayer make like a modern day June Carter and Johnny Cash (visually, at least) as they pose together for the first time for the cover of their latest single, "Who You Love".
Unless, of course, two of his chief protagonists, Osama bin Laden and Paul Wolfowitz, could be prevailed upon to pose together for the world's press on the Grand Palais steps.
Four soldiers pose together for a photograph and a platoon of pretty girls in military uniform (their short skirts worn above black knee-high boots) march in unison across the car park.
Then again, most BFFs don't normally pose together for the cover of Vogue.
All football should be as nice, with fans in their colorful costumes posing together for photographs.
They posed together for a picture, with Emmett holding a sign that read "Centenarian for Hillary".
They then posed together for photographs: Ali Smith, Jackie Kay, Andrew McMillan, along with Carol Ann Duffy herself, who funds the prize.
It put on a show of unity, with rival grandees posing together for the cameras in studious harmony.
The campaign, which ran on TV and YouTube, finishes with the girls on holiday posing together for a photo.
