QUOTE (05XRunner @ Mar 17 2010, 12:43 PM)

If you say so but I have seen numerous people putting the 50 1.2 and Sigma 1.4 in side by side and the Sigma pretty much is running with it just fine...The difference between the L's and Sigma EX builds are SOOO similar they are both built like tanks. I would not call the 50 1.2 the best on the market either as it has its design flaw of the focus shift that cannot be fixed. I dont get your handling claim. What is there to handle? They are both about the same size and have a focus ring and thats it.
Im not saying the Sigma 50mm 1.4 is a bad lens, just not comparable realistically to the Canon 50mm 1.2, First and foremost the L 1.2 is not an everyday lens or a nifty fifty at all. Where the 1.2 shines is what would set it apart from the EX 1.4. The amount of light coming through the lens while composing, that being the most important difference at least IMO/IME. Shooting situations or once in a lifetime situations like weddings, sunsets while on location, runway, low light locations etc. Seeing what you want to shoot without beam assistance or modeling is so important. I have used both the EX and L under that some of these circumstances and while shooting with the EX I was looking for more... Hyper focal shooting was problematic at best with the EX, again not an everyday situation, not as easy a process all the same.
Not as dramatic but a valid comparison, A 400 F5.6 and a 400 F4 and a 400 F2.8. They are all just as sharp as one another but the 2.8 costs more than the 5.6. All three of those lenses are purpose built just like a 50mm 1.8 1.4 and 1.2. For those reasons cannot be compared to one another based solely on price point.
As far as the 1.2 having focusing issues... I didn't it was always easy to work with @ 1.2 you are working with a paper thin DOF. There is a certain level of experience that comes with using super fast lenses, the two different copies I have used didn't seem to have any problems, once working at approx. 3 feet I made an adjustment and it went full back full forth and focused on AF lock. Anyone who separates ae lock and AF wont have an issue.
I didn't mean any offense to 50mm 1.4 owners, you have a great 50mm. All that I am saying is that there are very different tools, and shouldn't be compared so drastically.
QUOTE (MR.FEESH @ Mar 17 2010, 02:04 PM)

I recognize your qualifications, and I tip my hat to you sir. However, I would like to point something out. I suppose I should have clarified that I initially was referring only to quantifiable optical quality, since I've never held either of the lenses in my hands. In your comparison of the two lenses, though, you go beyond just optical performance by mentioning things like build quality etc--which, yes, is very important in determining the overall quality of a product. But if we're talking about overall quality of the lenses, then there is something that you have yet to mention--price. One question which needs to be asked, then, is: Is only slightly better optics, with moderately-to-significantly better build quality, and subjectively better handling worth paying almost $900 more for? Sure some people have tons of money, or like CM said, would pay a lot for quality glass. However you have to consider if what you get is what you pay for. Does the value of the product equate to its monetary worth? Maybe you can answer that since you've used both (I haven't). I don't want to guess but if I had to, I'd guess you get what you pay for in the case of Sigma...500 bucks, excellent optics and standard build quality. It doesn't seem like you get a fair deal for the 1380 you shell out for the Canon. In this respect the Sigma is a much better value (performance-to-price related ratio), which I guess is part of why I suggested it in the first place. Does this make sense at all? Idk if I'm not conveying my thoughts clearly...
You're right though, I probably shouldn't have suggested that the Sigma was so near to the top of the 50mm primes and in that sense I suppose I misspoke, my apologies. I meant more that, in general, it's a good option to look into.
No apologies or hat tipping necessary ! For $500 bucks your getting a great 50mm 1.4, better than Canon or Nikon can offer for that matter, bang for the buck wise. I would avoid comparing optical qualities in prime lenses of different build purposes... last time I checked the 1.8's out perform the 1.4s in that department. For some reason I decided to dig my heals in and state a point and at this point I may come of in a condescending manner... not my intention but it happens... ! I couldn't say if the HSM EX in weather proof but its build quality is inline with its end user cost... As far as your suggestion being right or wrong, its both. Depending on the point or comparison, which is why they would be best not compared at all, or compared on situation shooting. IE if I was going to use a steady cam and shoot HD video with an SLR ( thats a totally different can of worms... )