Fantastic tool. Essential if you do studio work or portraits. My in-camera meter is good but the light meter is better. I own a D700 and have found that mixing flash with ambient lighting, especially outdoors, messes up my exposure, or at least I have to "experiment" a bit before I get good results. I would get this over the 308. It meters for flash and has the dual ISO buttons which means you can take a reading and get a reading for indoors (ISO 800 for example) and outdoors (ISO 200 for example) from a flick of the button. Illuminated screen and twisty head are ace. The little leather pouch it comes in is fab. I'm very surprised not to see more 5-star reviews. Great bit of kit. Highly recommended. If you're old school, you won't have any doubts. If, like me, you're from the DSLR revolution you may need some convincing. Trust me, buy this meter, do some tests and you'll know exactly what I mean. The light meter rules.