Tamron 18-400 mm f/3.5-6.3 Di II VC HLD
7. Coma, astigmatism and bokeh
| D7000, 18 mm, f/3.5, center | D7000, 18 mm, f/3.5, corner |
|
|
| D7000, 50 mm, f/4.5, center | D7000, 50 mm, f/4.5, corner |
|
|
| Nikon D7000, 100 mm, f/5.3, center | Nikon D7000, 100 mm, f/5.3, corner |
|
|
| Nikon D7000, 200 mm, f/6.0, center | Nikon D7000, 200 mm, f/6.0, corner |
|
|
| Nikon D7000, 400 mm, f/6.3, center | Nikon D7000, 400 mm, f/6.3, corner |
|
|
The astigmatism, understood as an average difference between horizontal and vertical MTF50 function values, is significant reaching almost 15%. That value appears to be similar at the longer focal lengths (50-400 mm) and only at 18 mm it seems to decrease slightly.
Please Support UsIf you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
You deal with a mega zoom lens here so you shouldn’t expect any blur miracles because the Tamron 18-400 mm cannot provide them. You can notice a distinct rim and local extremes in the middle of the light circles and the mechanical vignetting also makes itself felt. It seems the observed images are less pleasant like those from e.g. the Sigma 18-300 mm OS.
| D7000, 200 mm, f/6.0, center | D7000, 200 mm, f/6.0, corner |
|
|
| Nikon D7000, 200 mm, f/8.0, center | Nikon D7000, 200 mm, f/8.0, corner |
|
|
| Nikon D7000, 200 mm, f/11.0, center | Nikon D7000, 200 mm, f/11.0, corner |
|
|
| D7000, 400 mm, f/6.3, center | D7000, 400 mm, f/6.3, corner |
|
|
| Nikon D7000, 400 mm, f/9.0, center | Nikon D7000, 400 mm, f/9.0, corner |
|
|
| Nikon D7000, 400 mm, f/13.0, center | Nikon D7000, 400 mm, f/13.0, corner |
|
|
