for someone who just started with film and with 4x5, will it be better to buy an analog spot meter or a digital one. Is one easier than the other to understand and learn the zone system. I am currently looking at the Pentax V analog and at the Pentax digital. I currently have a sekonik L-358, they sell a spot meter adaptor to put on top that costs around $160 or so. Not sure if that would be better than buying a used analog/digital pentax one. Any advice on the issue would be appreciated, thanks.