After testing the Mamiya Sekor-C 45mm f2.8 on my Sony NEX, it was time to test the 150mm f4. A great portrait lens for the Mamiya 645 medium format camera (90mm equivalent in 35mm format) which becomes a 225mm telephoto lens on the NEX. Due to the longer focal length, this lens is much harder to use than the 45mm. Narrower depth of field in combination with manual focus is not an easy task, and despite the focus peaking system or the LCD manual zoom, I was taking images at a much slower pace.
Image quality is great when you manage to nail focus and exposure, and since I don’t own a e-mount telephoto for my NEX, this lens is really very useful for the times that I need the long her focal length. At f4 it creates a creamy bokeh which I like very much.
I have also tried to shoot action with this lens, flying birds to be exact. The problem was that due to the narrow DoF and lack of autofocus, I had to use f11 and f16 apertures. Since I was shooting at a fast shutter speed the ISO went up, so the images were not as clear as I would like to. I think the e-mount 55-210 zoom from Sony with the auto focus and stabilizer functions is far more suitable for this kind of photography.
The image above shot at f16 also reminded me that I must clean my sensor !!!
In conclusion, the 150mm f4 is a great addition as telephoto lens for my NEX system, and I will sure use it at the future. Enjoy the rest of the images.
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