>>4164628I am in the market for a wide lens for my Nikon DSLR full frame for landscape/cityscape. I was thinking 24mm but have decided to go a little wider to 20mm. Zeiss's Distagon T* 21mm F/2.8 has caught my eye. I want something with good optics and high quality manual focus. I'd like to keep the budget for a used lens under $1000. What other lenses should I consider? Any wider options I should consider?