It's created one hell of a conundrum for me. Maybe you guys can help. So today at work, we received our very first Pentax 50mm 1.4. I saw it on the truck sheet(The list of what has been shipped to our store) and immediately started digging for it in our giant plastic crates. I spotted that green and black box and tore it open right there (Edit: it's a gray and red box, hehe). I was thinking "What's this thing going to feel like?" and "Is it going to be any good compared to my vintage 50mm?". I was surprised. Pleasantly. It has fantastic build quality for a modern lens and is far more sturdy than any of the other 50mm or 18-55 lenses from the other brands. And this is the kicker: it's half the cost of the other 50mm primes. I usually avoid fanboyism on the internet and while selling cameras, but I can't help but wonder why people shoot other brands when Pentax lenses are always of such great quality at such ridiculous low prices. The reviews for this lens confirm it; the optics are great too and it's a wonderful piece of glass. And here's the double kicker: With my employee discount, this thing will cost me $140 brand new. I'm thinking awful things. I'm thinking of replacing my cherished old 50mm with this newer autofocus model. Should I?