Re: Canon EF-S 35mm f/2.8 Macro IS STM Images & Specs Leak Out
Kwwund said:
Does the macro capability in any way diminish the performance of the lens as a plain old 35mm prime?
In most cases, macro lenses will have slower autofocus than their non-macro equivalents. They also tend to lose a little more light over transmission, meaning that through a macro and a non-macro lens may be both f/2.8, the non-macro could be t/3.2 while the macro might be t/3.5, or something along those lines.
In casual shooting, only the slower autofocus part will ever really be noticeable. And of course it is possible that this particular lens may have perfectly fast autofocus; nobody will know until it's actually available for use.
Also, what are the disadvantages of using an EF-S 35mm instead of an EF 35mm lens on a crop sensor camera (aside from build quality and possibly aperture differences)?
The EF-S
may have slightly heavier vignetting and aberration toward the sides and corners. But, equally, lenses specifically made for APS-C sensors (EF-S) can often be sharper in the centre than lenses intended for APS-H and 35mm sensors (EF)
However, those differences tend to be extremely minor.
The thing is, it is incredibly unlikely that this macro lens will be any cheaper than the existing Canon 35mm lenses. Macro versions of lenses are
always more expensive and the fact it also has the illumination feature will put the price up further. So if you're not interested in shooting macro and will get no use out of the built-in illumination then you'll be spending more money for no particular reason.
If you just want a 35mm prime, buy a regular one.