fcnealvillangca :
hello all of my camera uses 50mm f1.8. but it's too narrow for some uses. what are other lens maybe wide angle lens that will give me a frame that can fit Taylor Swift from her head up to her knee in a distance of 1/2 meter? is there anything under $150?
For $150? Not a good idea, her time is far more valuable than that!
Now, if you meant what focal length you need for a 1m subject at 50cm (which is very close), you'll need about 65 degrees (simple trig), and you can find the conversion for your sensor size on the tables at http
/www.nikonians.org/reviews/fov-tables. If you have an APS-C camera (considering your budget, you do), that's about 18mm, which means you will NOT find a lens in your budget. Either shoot from further away or save up more money.