RonaldH's reviews

Sigma 28-70mm f/2.8 EX DG

This lens is nicely finished and works flawlessly on my Nikon D70. Of course I don't have the test equipment to say anything meaningful about image quality compared to other lenses... with one exception. The point of lenses like this is their speed. If you need f2.8 you are going to use it. The difference between f2.8 and f3.5 is easily seen with this lens. f2.8 is much softer. Despite this I think it represents good value for money. Try it out for yourself to see if it fits your needs. I'm currently not tempted by alternatives.