The Sigma Sisters. While they get bashed a bit out there by purists, for the price you can't beat 'em. 10mm on a DX camera is a must have. 24mm f1.8 is a useful member of my low light arsenal (24, 50, 85, 200). A little bit prone to flare (hoods supplied) and be SURE to be concious of the camera level when using the 10. Walls sloping inwards and outwards can be cool, but only when you want it! Held level, it shoots em square. Don't be led to believe that it distorts the heck out of everything, there are some whacked images posted but thats operator error (or intent). Oh and if you get anything Sigma, order Nikon front and rear caps at the same time....