best value telephoto lens for Nikon d5500?

[Ilovebokeh]

Hi,

I am new here. Hi, I am a beginner from Perth (put intermediate as I know a little).

I definitely have the photography bug eg. some nice long exposure shots

http://instagram.com/p/BYvBUqBhaLI/





I use a f2.8 Tamron 15-50mm lens, but would love a telephoto lens (ideally f2.8 but best value.)

Any easy suggestions? Especially in Perth?

eg. the original

[hide][top]Sigma 50-150mm f/2.8 Lens

would be nice.

Or anything brand new?

I would also consider an all purpose lens (ideally f2.8.)

Thank you