A toy to distract her is a good idea ( I have a friend who is a parttime cat photographer, and she gets whole litters of kittens to sit still that way), doesn't have to be a toy, could be whatever is handy, I've even once gotten Mimosa's attention by waving a dustbunny consisting of her own fur
Grab whatever is near you.
You could also use the zoom on your camera so you can keep your distance a bit more, or just take a picture from a bit further away and crop the picture to just the part you like on your computer afterwards.