Not at all. Beautifully made. Not better in terms of image quality, and therefore not worth the money in my opinion. I bought 4 of them for my Nikon and have so far sold 2 and went back to the Nikkors. Since you've asked specifically about a 50mm I'll say my lowly Nikkor AF-D 50mm f/1.4 is every bit is good as the 50mm f/1.4 ZF Planar I ended up selling.
Originally Posted by ted_smith
Save your money.