CarlMillerPhoto said:
Ruined said:
privatebydesign said:
Ruined said:
Sorry, it is reserved for f/1.2 and faster lenses only
Sorry, mythbuster alert.
Since when was the Sigma 50 being incapable of f/1.2 a myth?
He was making the point (successfully, I might add) that most can't tell the difference between the Canon 1.2 and most other 50mm lenses in just about all real-world and practical situations. All that "wow it's just so different" bla bla is usually post-hoc judgement once a person knows what lens created the image.
Then, those "most" aren't looking very closely.
If you are trying to argue there are diminishing returns the more expensive the glass gets, then yes, this is true. Even the $99 50mm f/1.8 can put out some fantastic images.
But, the statement that the Sigma 50 1.4 / Canon 50L look the same is blatantly false. When put side-by-side, there are several areas that are immediately noticeable. First, the obvious, the Sigma has less depth of field control as f/1.4 can't render DOF as thin as f/1.2; this is very basic physics that no amount of downplaying can counter. Second, the Sigma has a strong red push; some may like this, personally I think they make the pictures look less realistic and oversaturated. Third, the Canon 50 intentionally has more uncorrected spherical aberration, as lens designers have found this leads to more pleasing bokeh; the Sigma 50 instead corrects these aberrations as this looks better on a test chart. Fourth, the Canon 50 can allow in 50% more light for better ISO performance in low light than the Sigma 50 (again physics). Then there are of course intangibles, but there is no point in going there in terms of this debate.
If you want the best bang per buck, the Canon lenses under $400 are hard to beat. But, some think it is worth it for the rendition the more expensive L lenses offer. What stop you get off on the "good enough" train is purely a personal or professional choice.