tamron 17-50 F2.8 II bokeh & sharpness

Posted: January 7, 2010 in Camera
Tags: , , , , , , ,

Test #1 : Comparing my kit lens with Tamron 17-50mm f2.8 II

ok, here’s some experiment i did with the new lens. I wanted to compare the sharpness between my Nikkor kit lens (18-55mm f3.5-5.6) with Tamron 17-50mm f2.8 II lens.

background: My D5000 was set up on a tripod and to maintain the same distance, I had only remove and replace with the lens when shooting. ASA 200, camera set to ‘A’ priority and no Photoshop. Set up near a natural light (window).

from the above pictures, one can make a conclusion that with both lens open at f5.6, both picture show almost the same sharpness, i even have problem trying to tell which pic is the sharpest!  There are only 2 visual differents

1) the bokeh produced by Tamron is slightly overexposed on the high contrast area.

2)the picture are slightly brighter compare to the kit lens Nikkor 18-55mm.

Test # 2: testing out the f-stop

on this 2nd test, using Tamron 17-50mm, I took 3 shots of the same object using different f-stop at 50mm. Here’s the finding:

1) @ f2.8- again, the high contrast area on the face has lost some details. Due to the limited depth of field, any object beyond that are blurred thus results in a lost of details (the 2nd figurine on the right)

2) @ f5.6 – we can see the background bokeh is showing more details as well as the details in the right-hand figurine.

Test # 3 : wide angle test

shooting using Tamron (pic on the left) , again we are seeing some lost of detail in the highlight area (background) and the image seems to be slightly softer when compare to Nikkor lens

Btw, those figurines are of New Zealand All Black. I collected these when i was a student in Otago, New Zealand. The one on the right is Christian Cullen and i cant recall the other one 🙂


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