300mm f/2.8 + TC1.4EII at f/4 is definitely not as sharp as the 300mm f/2.8 at f/2.8 and is marginally not sharp enough. The 300mm f2.8 when @ f2.8 (wide open) will be sharper than the 300mm f2.8 + 1.4x TCII is attached and shot at f4 (also wide open). This stands to reason as the 1.4x TCII does degrade the image slightly.
A tough, all-metal housing and full weather sealing mean the durability of the Olympus 300mm F4 PRO easily compares to the best lenses by Canon and Nikon. Six months after first renting the Olympus, I sold all of my Canon gear and purchased a Lumix G9 body, a variety of Lumix/Leica lenses and the Olympus 300mm f4 PRO lens.
While detailed test results from the teleconverter will be published in the upcoming Sigma 120-300mm f/2.8 review, I will share some Imatest data with our readers from this lens and compare the performance of the teleconverter to the Nikon TC-14E II, mounted on the Nikon 300mm f/2.8G VR II lens. NIKON D3S @ 420mm, ISO 800, 1/800, f/5.6
The lens is built extremely well. Unlike the new lenses with lots of plastic exterior, the lens barrel of the 300mm f/4D AF-S is made of metal. The rubber focus ring is large and very smooth to operate. There are only two switches on the side of the lens – one for switching from autofocus with manual focus override (M/A) to manual focus (M
Nikon 120-300mm f/2.8. If you like the idea of a 300mm f/2.8G II but in a zoom, this is your lens. Interestingly, it is 3.25kg, which is not much heavier than the 2.9kg of the 300mm f/2.8. I would suggest that for most people, this lens is a little bit short for wildlife, especially at $9500. This is a very specialized tool.
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nikon 300mm f4 vs f2 8
