Tamron 70-210mm f4 VC review
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Written by Thomas
Quality
Sharpness and contrast
Let’s have a look at the theoretical performance of the new lens (first pair of MTF-charts) at the wide and the long end first and compare it to the performance of the Tamron 70-200/2.8 VC G2 (second pair of MTF-charts):
These charts show the lens-performance wide open without influence of diffraction. To read these charts you need to know that higher values are better and the closer the line-pairs are together the less astigmatism (= resolution depends on the orientation of the test-pattern) the lens has. The x-axis displays the distance from the optical axis (=center of the sensor) in mm. I’ll show you the real-life performance at 4 mm (center), 13 mm (APS-C/DX-corner), and 20 mm (FF/FX-corner) on a D850 below.
From the charts, the new Tamron should be outperformed by its larger (and older) sibling: at almost any point the f2.8 Tamron is sharper and produces a higher contrast at f2.8 than the new zoom shows at f4.0. When you stop down the f2.8 Tamron to f4.0 its values should be even higher thus increasing the performance lead of the Tamron 70-200/2.8 VC G2 over the 70-210mm f4 VC. But let’s see how this theoretical performance translates into real life results in the sharpness test based on Siemens-stars.
What follows are near-center results (first column) followed by APS-C/DX-corner results and FF/FX-corner results on a D850. Processing was done in Lightroom 7.3 / CRAW 10.3 from RAW with Adobe Color profile. Noise-reduction is set to 0, sharpening to 50/0.5/36/10, with no extra tone, color, or saturation-adjustment. White-balance was adjusted to a neutral white and I did some exposure compensation to make the brightness of all crops match. So you will not see light fall-off in the corners. CA-removal is ON. In my comparisons below the Tamron 70-200/2.8 VC G2 was shot on a D810 which has a 12% lower (linear) resolution than the D850 on which all the other lenses were shot. Still the results give a very good impression of comparable performance.
The following are all 100% crops!
First up is an overview of the wide-open performance at different focal lengths first without the use of a tele converter followed by shots using the Tamron TC-X14 tele converter. You can jump to the detailed results at different apertures and comparisons with other lenses by clicking on the crops of the respective focal length.
The lens performs best around 150mm focal length where even the FF/FX-corner looks very sharp wide open. Performance within the APS-C/DX image circle is also very good at shorter focal lengths. At 210mm the lens is clearly weaker than at other focal lengths: the center is less well defined, the APS-C/DX-corner are soft, and the FF/FX-corner outright mushy.
Let’s see how well the new Tamron holds up using a tele converter.
With a 1.4x tele converter strengths and weaknesses of this lens become exposed like under a magnifying glass. At 98mm and 210mm focal length the lens still performs well in the APS-C/DX image circle with a very sharp center at 210mm. At 210mm the results with tele converter (at f5.6) look even slightly better than the results without it (at f4.0). But at 290mm focal length the combo becomes very soft even at the borders of the APS-C/DX image circle.
If you want to see all the details, read on. Or fast-forward to the performance at long distances.
Following is a comparison with the competition at 70mm, f4.0:
The new Tamron sharpens up nicely when stopped down to f5.6. Comparing it to the competition at f4.0 shows that it is slightly behind with its biggest weakness being the FF/FX-corner. Its direct competitor from Nikon, the 70-200/4.0G VR, clearly produces the sharper results across the sensor.
Following is a comparison with the competition at 105mm, f4.0:
Similar results at 105mm: The new Tamron is almost up there with the best in the APS-C/DX image circle but lags considerably at the FF/FX-corner which needs to be stopped down to f8 to become sharp. Best performers at this focal length are both f2.8 zooms from Nikon and Tamron.
Following is a comparison with the competition at 150mm, f4.0:
Now at 150mm the new Tamron performs best: its performance in the center and the FF/FX-corner is right up there with the best only trailing at bit in the APS-C/DX-corner.
Following is a comparison with the competition at 200mm, f4.0:
Unfortunately for a telephoto zoom the long end of the new Tamron clearly falls behind the competition. Only the center performance holds up. Stop down to at least f5.6 – or even f8 if you want satisfying performance in the FF/FX-corner.
Overall Tamron’s new lens is a good performer albeit with generally soft FF/FX-corners except for 150mm focal length where the lens really shines. Its biggest let-down is the sharp drop in performance between 150mm and 210mm.
Using a 1.4x tele converter reveals a similar pattern. The new Tamron is good at the short end of 98mm but topped by the competition. At 210mm (=150mm x 1.4) the lens is very close to its direct competitor, the Nikon 70-200/4.0G VR. At 290mm performance takes a big hit and only center performance is close to the Nikon 70-200/4.0G VR (with TC-14Eiii).
If you want to skip the details fast-forward to the performance at long distances.
Performance at 98mm:
Following is a comparison with the competition at 98mm, f5.6:
Following is a comparison with the competition at 210mm, f5.6:
Following is a comparison with the competition at 280mm, f5.6:
The Siemens-star test-targets are shot at a distance of 45x focal length (i.e. at 9 m for 200 mm focal length). But performance of lenses also depends on the shooting distance. Therefore I present another series of test-shots of a city-scape around 1km away. Processing was done in Lightroom 7.3 / CRAW 10.3 from RAW at Adobe Color profile. Noise-reduction is set to 0, sharpening to 50/0.5/36/10, with no extra tone, or saturation-adjustment. There’s no tinkering with vignette-control so you see it here as it is produced by the lens. I used AF in live view at the largest aperture and did not change focus for other apertures. As usual I have selected the diagonal that provided the better corner results as almost any lens is a bit decentered.
First up is an overview of the wide-open performance at different focal lengths first without the use of a tele converter followed by shots using the Tamron TC-X14 tele converter. You can jump to the detailed results at different apertures and comparisons with other lenses by clicking on the crops of the respective focal length.
The new Tamron repeats its performance from the earlier tests in this long distance test: It’s best at 150mm (or 210mm with 1.4x tele converter), clearly weaker at the long end, and good to very good below 150mm within the APS-C/DX image circle.
If you want to see all the details and comparisons with the competition, read on. Or fast-forward to the next chapter on vignetting.
The main image shows the complete scene wide open to give you an impression of the angle of view and to judge vignetting. You can access the respective shots up to f11 via the links beneath the main image. All shots were made at ISO 64 and VR switched off. Following the main image are 100% crops from the center, the APS-C/DX-corner and the FF/FX-corner from the new Tamron, the Nikon 70-200/4.0G VR, and the Nikon 70-200/2.8E VR wide open to compare performance and then from the new lens down to f11. All lenses were shot within minutes of each other.
You can click on each image to access the large original. Please respect our copyright and only use those images for personal use.
Results at 70mm focal length:
At 70mm the new Tamron is outperformed by the competition from Nikon if you use it wide open at f4.0. But stopped down to f5.6 the performance is almost a match.
Results at 105mm:
Same at 105mm focal length: stop down to f5.6 and the performance is very good.
Results at 150mm:
At 150mm the new Tamron performs best and can easily keep up with the competition.
Results at 210mm:
210mm focal length is not the forte of the new Tamron. But the center still delivers good sharpness.
Let’s see how the lens performs on Tamron’s TC-X14 1.4x tele converter in this long distance test.
Results at 98mm:
Stopping down to f8 will improve performance with the 1.4x tele converter visibly almost up to the competition.
Results at 210mm:
At 210mm (with 1.4x tele converter) the performance of the new Tamron matches the competition at f5.6. No need to stop down.
Results at 290mm:
Even stopping down to f8 does not bring the performance of the new Tamron plus 1.4x tele converter up to the competition.
Vignetting
To make it easier to compare light fall-off in the corners of a full-frame sensor I’ve arranged a series of three shots each with the Tamron and the Nikon at different apertures. From left to right: f4, f5.6, and f8. First at 70mm:
Tehn at 210/200mm focal length:
At 70mm the Tamron has similar vignetting wide open to the Nikon, but the Nikon pulls ahead at f5.6. At 210mm the Tamron shows less vignetting than the Nikon (at 200mm) wide open and stopped down.
Rendering of point-light sources at night-shots
Night-shots pose a different challenge for lenses as the contrast is even higher than under bright sun and point-light sources can reveal some weaknesses such as coma, haloing and color-aberrations that do not show up as prominently in other test-shots. The 100% crops below the main image show the effect of coma in the lower right FF/FX corner of the new Tamron at 70mm focal length and various apertures:
The new Tamron has a little bit of coma at f4 but the Nikon 70-200mm f4G VR has even less. See below:
Rendering of out-of-focus point-light sources and Bokeh
This test is for the rendering of point-light sources in an out-of-focus background. The circle of confusion that is produced by this test is pretty indicative of Bokeh performance (in the background) and light fall-off. Ideally the out-of-focus image of the point-light is evenly lit and perfectly circular, with no “onion-rings”, and without coloration. Large aperture lenses normally produce an effect known as “cat’s eye” the further away from the optical axis the point-light is projected. This is due to optical vignetting in the lens barrel when light enters the lens from an angle.
The 44% crops above show that the Tamron 70-210mm f4 VC produces small Bokeh balls when used wide open – as was to be expected from an f4 lens. It exhibits no onion rings but creates a slightly blotchy structure inside the circles of confusion. The light-distribution across the circle is very even, outlining is nearly non-existent except towards the FF/FX-corner and shows no green coloration from loCA. There’s some cat’s eye effect which reduces the size of the Bokeh balls towards the corners and may generate some nervousness in out-of-focus areas there. The lens produced no clipping from the mirror-box.
In comparison the Nikon 70-200mm f4G VR produces slightly smaller Bokeh balls which are also not perfectly circular even in the center of the image. Seems like the aperture is protruding just slightly into the path of light even when completely open. This might be an individual problem of my copy The Nikon also shows more outlining than the Tamron.
Now let’s see how this analysis of out-of-focus point-light sources translates into Bokeh-performance shooting a bookshelf. I used the longest focal length that I could to produces a comparable shot to my other reviews which in the case of the new Tamron was 145mm:
Following is the Nikon 70-200mm f4G VR shot from the same position. I had to zoom in to 140mm to achieve the same magnification.
The new Tamron produces a slightly better blur than the Nikon especially in the foreground. Both lenses are also free from longitudinal CAs that would give the letters in the middle-ground a greenish halo. But naturally the amount of Bokeh from any f4 lens is limited.
Let’s see what an f2.8 zoom like the Tamron 70-200mm f2.8 VC G2 can achieve wide open and zoomed in to 175mm focal length. But not to worry: that produces the same magnification as in the above shots.
Clearly the f2.8 Tamron produces the softer Bokeh when shot wide open. This is clearly the benefit of the larger focal ratio.
Flare/ghosting
Catching a strong light-source shining directly into the lens is always a risky business. It could produce strange colorful ghosts-images or reduce contrast considerably through flare and glare. The appearance of flare and ghosting depends on factors like the aperture and the angle of the light hitting the lens. So to judge the proclivity of the Tamron for these artifacts I went through a series of well calculated shots against a strong light source to provoke glare and ghosting. The lens hood was attached in all of these tests.
The new lens is quite prone to flare and glare. Especially on the long end having a strong light-source inside or even just outside the corner of the frame (see image on the right below) should be avoided as veiling glare and ghosting heavily reduces the contrast. On the short end the lens behaves less critical and maintains overall contrast much better. Still it produces clearly visible flares and ghosts when the light is inside the frame. And sunstars are not a forte of the new Tamron. Following are two of the more extreme effects:
In comparison the Nikon is a little less susceptible when the light is just outside the corner of the frame but it more easily produces streaks/rays and it has even less well defined sunstars.
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