^^
that is an interesting solution but with the TC would put you above your budget unless you sell the 70-300VR to fund a few £s more.
If you like the quality from the 70-300 why not get a d7000 for half your budget to give you more reach, a spare body and some money on the side for other stuff?
Have you got a 300 F4?I've been looking at long lenses recently and for me the best Nikon option is the Sigma 120-300 OS. It is f/2.8 so you can buy a 1.4/2x tc without any issue and get 420 f/4 or 600 f/5.6 (with some image quality degradation obviously).
Nikon are severely lacking in well priced long lenses IMO and paying over £1k for a non VS 300 f/4 is stupid IMO. The OS on the 120-300 will be very useful for wildlife, especially when going long with TCs.
The OS on the 120-300 will be very useful for wildlife, especially when going long with TCs.
Have you got a 300 F4?
If that wildlife stays very still, aye.
I paid extra for the image stabilisation (600mm f4) but have it turned off all time.
fracster said:But you don`t have a Nikon F4, the lens under discussion?
I have owned a Sigma 120-300 and the have a Nikon F4, the Nikon beats the sigma at IQ,sharpness,lightness,ability to handle TCs,close focus distance,it does not need stopping down with either the 1.4 or 1.7 tc it sharp with either wide open.
For small birds,the Sigma needs a 1.4 tc to fill the frame as the close focus distance is dreadful.
The only thing the sigma has is the zoom, but for wildlife I found that I was always at 300 anyway.Saying that, I did like my Sigma,but the Nikon is just better.
VR/OS/IS or whatever you want to call it is damned near useless for fleet moving creatures. So, for me, that is a non issue.
The 120-4oo gets good reviews, that may be worth looking at as Tom suggests.
I've used or tested loads of different lens/body combinations (including this one)so I'm not just spouting.
But we all have our own opinions.
But you don`t have a Nikon F4, the lens under discussion?
I have owned a Sigma 120-300 and the have a Nikon F4, the Nikon beats the sigma at IQ,sharpness,lightness,ability to handle TCs,close focus distance,it does not need stopping down with either the 1.4 or 1.7 tc it sharp with either wide open.
For small birds,the Sigma needs a 1.4 tc to fill the frame as the close focus distance is dreadful.
The only thing the sigma has is the zoom, but for wildlife I found that I was always at 300 anyway.Saying that, I did like my Sigma,but the Nikon is just better.
VR/OS/IS or whatever you want to call it is damned near useless for fleet moving creatures. So, for me, that is a non issue.
The 120-4oo gets good reviews, that may be worth looking at as Tom suggests.

To be honest mate, sorry don`t know your name, handholding a 5/600 at 1/100th, vr/os is not going to help a great deal. Unless your built like popeye on condensed spinach.........
But, if you really need VR/IS or OS, then it seems a decent plan to go the Canon route.
Like Drexyl above, mine is either rested on a bean bag or on a tripod, so VR for me is not an issue, I do understand that for others it is.
Many thanks for the replies. Combining lenses with TC's seems to be the preferred option. Therefore would the loss of upto a couple of stops depending on the TC be compensated with increased ISO.![]()