400mm manual prime

[liketotakephotos]

Good morning folks ,
i'm after a some advice ,i'm a Pentax K100d sr user ,and i'm in the hunt for a descent manual lens for a bit of wildlife photography.I'm only just getting into it and i'm on a budget.The Pentax 400 f5.6 looks good as does the Sigma 400 f5.6 .Are there alternatives out there that anyone could suggest (ie) a Vivitar 70-210 f3.5 with a tc x1.4 or Tokina 70-210 f3.5 tc x1.4 .I'm open to any other suggestion ,ta for lookin :)

[Bandit]

Good morning folks ,
i'm after a some advice ,i'm a Pentax K100d sr user ,and i'm in the hunt for a descent manual lens for a bit of wildlife photography.I'm only just getting into it and i'm on a budget.The Pentax 400 f5.6 looks good as does the Sigma 400 f5.6 .Are there alternatives out there that anyone could suggest (ie) a Vivitar 70-210 f3.5 with a tc x1.4 or Tokina 70-210 f3.5 tc x1.4 .I'm open to any other suggestion ,ta for lookin :)

TC's will give a loss in image quality to be honest, and coupled with a Vivitar beer bottle end ( They were never good at lens making) soft will be the name of the game. Stick with the 400mm lens.

[liketotakephotos]

cheers for the input