Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
If it's only one lens, for less then $300, given the criteria I would go for the Sigma 24mm f/1.8 EX. Brand-new the street-price is $255-360; I've also seen used examples for as low as $200.
The 24mm will give you 36mm equivalent on a D90, which should be adequate for most occasions. The lens is also relatively fast at f/1.8, a good stop over the Nikon equivalent. In addition to that, the lens can be used extreme close-ups due to its minimum focusing distance being a mere 18cm/7 inches.
Some shots using this lens:
http://photo.net/canon-eos-digital-camera-forum/009KEJ
I've been wondering about this lens all winter long. I wish I could see some video using one on a DX frame. I heard its soft at 1.8, but not sure if that only meant at the corners - which wouldn't matter for a cropped frame D90.
Any video samples of this?
What about the Zenitar 16mm f/2.8 (24mm equivalent on a D90)?
If you are considering 24mm, keep in mind you will have some perspective distortion.
Would that still be the case on DX, given its the equivalent of 36mm?