Not much bigger than the Sekonic 308 is the 408 - another discontinued model you can find on eBay. It does incident, reflected, 5-degree spot and flash. Uses a single AA battery, and is weatherproof and somewhat ruggedized (no, you don't want to repeatedly bounce it off rocks - it will break like any other - but the occasional bump and bang will do it little to no harm. I have two of them (one's a backup) and they've both been dragged around and knocked into stuff and come through with flying colors). They can also be user calibrated to match personal preferences or another meter. This is a big plus if you sometimes use an in-camera meter, or you have standardized your exposure/development routine around another meter which you are replacing with this.