"500mm / 1000mm f/8 Manual Focus Lens is a classic mirror-style T-mount lens that is a welcomed addition to any sports or wildlife photographer's kit bag. It's lightweight and compact and it focuses a...
AdvantagesEasy and quick to use, pen doesn't dry out quickly
DisadvantagesNot infallible method of detection
AdvantagesSuperb quality, very reliable.
DisadvantagesSome people may not like the fountain pen.