On 22/07/2019 19:55, Sandman wrote:


I've always wondered why they make these lenses så slow, is it just to make
them compact? This lens is equivalent to a 24-120mm/f8, and compared to the 24-
120/f4 for Nikon, it's tiny. But a 24-120mm/f4 equivalent (16-80mm/f2)
shouldn't have to be as big, so why make it so slow?

No mystery, it keeps the size and price down. In the days when 100 ASA
was a fast colour film, you needed all the light you could get. Not any
more.