By the way, folks:
http://www.bhphotovideo.com/c/product/47220-REG/Sekonic_401_805.html.
Best light meter accessories I have ever used. Put in the slide that matches the difference between your film speed and your desired shutter speed, and the meter gives you a directly-readable f stop by simply placing the meter where you want to measure (and without ever needing batteries). Incredibly quick and hassle free...the BEST for street photography and other types of photography in which you just need a good exposure right away, and need to change often.
I usually use the slide in which the film speed is 1/3 below the fractional shutter speed. (ISO 400 at '500, ISO 100 at '125, etc.) I shoot at '500 whenever possible. It is my "go-to" shutter speed for general purposes...and 400 is my usually-used film, so this is the slide for me most of the time.
I also sometimes use the slide with which the shutter speed is set two speeds slower than 1/3 over the film speed. For instance, 400 film with a'125 shutter.
However, you can also use the slides in this big kit for standard shutter spacing at ISOs 125 and 160, common film speeds.
$55 for a full set of them is a deal and a half...just like these light meters, new or used.