Vivitar

I've been taking a lot of pictures with two Vivitar cameras I picked up at the thrift store. I just recently got a lot of rolls printed. I'm thinking about putting my Flickr account to use and posted a lot of them there. Speaking of photography, I recently bought my girlfriend a Holga camera. She loves it. It's sort of reinvigorated our interest in photography. I just need to learn how to properly use my Nikon D100...