| Joined: | Sun Apr 1st, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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http://www.naturfotograf.com/lens_zoom_03.html#AF70-300f4.5G
I find the CA, (colour fringing of high contrast edges) very pronounced. It gives me useful reach on FX without the weight penalty of the 300mm f/2.8 lens which is a bit of a monster. I found with the D3 and even the D300s, that the lens appears to vignette strongly, producing images with dark corners, on the D800 it seems less pronounced, which suggests it's at least partly related to sensor design.
I am currently using the 70-300 to test my equatorial mount, because it's distinctly lighter and more compact than the f/2.8. Once I have sorted the EQ mount I expect to revert to the 300, f/2.8.
I suggest you try a copy to see how it works with your camera. It should be good on a DX, given it's not using the edges of the image circle. Remember on a DX sensor at 300mm it's the equivalent of 450mm which is pretty long, you need good technique to get sharp images hand held. I feel a 70-200 (or 80-200) is a perfect companion for a DX, hand held, you can always crop a bit, especially with modern sensors.
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Robert.