Originally posted by johnhilvert While only about one one in 20 interchangeable lens devices are Pentax these days, there remains a strong disproportionate interest in the brand.
I suspect this is due Ricoh/Pentax making backward lens mount compatibility fundamental to its future. So the market of Pentax users is broad and rather loyal notwithstanding, it is not a top brand purchase these days. I also suspect Pentax users hold onto their gear much longer than other brands.
In the video game world, the nerds would argue about "attach rate," which is the number of games a user buys for a given system. For a while, the PS3 was selling a lot of units but not moving as many games; people were buying it to play Blu-ray movies and use a media hub. That's fine for the user but Sony only makes money on the software license.
It's something similar with cameras. Canon especially sells a lot of units to people who buy the lowest Rebel model kit and never buy anything else again. Canon makes some profit on that but it doesn't really help their bottom line all that much. It's market share but it's not useful market share. When that camera dies or just grows too old, the guy may replace it with another brand since he has nothing keeping him in the Canon system.
There's no way to measure "useful market share," the percentage of your buyers who are repeat buyers. That's the slice that makes the money.