You could buy a wide angle lens for these fields unless you have got the prime lens, then don't buy anything. If you want a sharper and better lens at low light conditions at "cheap category" is the best, but i think that doesn't fit on your needs. A Zeiss lens around 24 mm is one of the best choice, but also very expensive.
By Amazon Customer on 12 November 2017
Hi, It comes with Lens hood (ALC-SH116: round shape, bayonet type), Lens front cap, Lens rear cap. You can have a look on the full specifications and what's included in the box here: http://bit.ly/2ogxxXU (you'll need to copy and paste the link in a new page)
By Sony S.
on 29 March 2017
Why not buy the black one? It is in stock at the minute. To be honest I might have to buy the 19mm sigma in silver I'd prefer black to match my camera but the way I see it is its a tool so it doesn't matter if it looks great as long as the images I capture look good
By buxz777 on 20 August 2015