Originally Posted by deudeu
Sorry about that. I have never even heard about that lens, my brain didn't register!
No problem. I guess the reason I started this thread was that I just don't understand why third party lens manufacturers don't make all of their lenses available for all the major mounts (Nikon, Canon, Pentax, Oly/Panasonic, and even Sony/Minolta).
Yes, the situation is a little different with Tokina and Pentax since they're both owned by Hoya and share lens designs ... but the other third party companies should make all their lenses available for all the mounts.
Look at Zeiss (
Welcome to Carl Zeiss Camera and Cine Lenses) they obviously think it's worth their time and money to make every lens available for the Pentax mount.
The reason I say that is simple: Even though Nikon and Canon have MUCH more market share in the DSLR space than the other companies, MOST of that huge market share comes from "point-and-shoot" consumers who purchased a DSLR but who will NEVER purchase another lens beyond the kit lens that came with their DSLR.
On the other hand, I think the percentage of people who buy extra lenses is MUCH higher among the smaller manufacturers like Pentax, Olympus, Panasonic, and Sony because the "point-and-shoot" consumers generally don't buy these brands.
I don't have access to Sigma's sales figures, but I'd be willing to speculate that if you look at the sales of lenses (priced below $1,500) that are available for all mounts you'll find that the total number of lenses sold is
very close among Canon, Nikon, Pentax, and Olympus/Panasonic because more Pentax and Olympus/Panasonic owners are buying extra lenses.
I mentioned the top price of $1,500 because extremely expensive ($2,000+) glass is usually only purchased by working pros and enthusiasts with obscene amounts of money. While there are working photographers who use Pentax and Olympus cameras, I'm sure there are fewer of us than Canon and Nikon.