No worries. I do well believe that this is an excellent lens ... which is why I have a hard time to believe that it is inferior to the G2.
Just because of diffraction alone, f/4 should be better than f/6.3 on the G2 assuming that the lens is well centered.
These zoom lenses are darn good, yes, but at least I can see a difference in quality when it comes to the rendition of fine details within very white or very dark structures (like feathers). The word "micro-contrast" is a bit overused but it is exactly that (which is high resolution in conjunction with high contrast).
The sample images of the Sigma 150-600mm C are undoubtedly sharp but that micro-contrast is missing (at 50mp).
Just because of diffraction alone, f/4 should be better than f/6.3 on the G2 assuming that the lens is well centered.
These zoom lenses are darn good, yes, but at least I can see a difference in quality when it comes to the rendition of fine details within very white or very dark structures (like feathers). The word "micro-contrast" is a bit overused but it is exactly that (which is high resolution in conjunction with high contrast).
The sample images of the Sigma 150-600mm C are undoubtedly sharp but that micro-contrast is missing (at 50mp).