Om System Telephoto Lens Review: 100-400mm & 75-300mm & 40-150mm
Om System Telephoto Lens Review and Comparison
I took all the test and sample shots with the OM-5 (in the 300mm comparison test, an additional photo was taken with a different brand body and 100-400mm lens).
The equipment I used in the investigation;
Om System Om-5
M.Zuiko 40-150mm f/2.8 Pro
M.Zuiko 100-400mm f/5.6 - f/6.3 IS
M.Zuiko 75-300mm f/4.8 - f/6.7 II
M.Zuiko MC-14 1.4x Teleconverter
First, I want to mention that thanks to the crop factor advantage of the MFT sensor, the three lenses I used were of a size and weight that would be seriously beneficial when hiking in the field.
Dimensions and weights;
75-300mm 69mm x 116.5mm 423gr (Lenses with similar focal lengths, such as 100mm x 300mm, weigh approximately 2-2.5kg)
100-400mm 86.4mm x 205.7mm 1.120gr (Lenses with similar focal lengths, such as 100mm x 300mm, weigh approximately 2-2.5kg)
40-150mm 79.4mm x 160mm 760gr (Lenses with similar focal lengths, such as 85mm x 200mm, weigh approximately 1-1.5kg)
75-300mm;
This lens, which we can consider a great value for money, is small and effective enough to not take up much space in our bags. It offers the advantage of being able to carry all equipment in a single bag for both macro and wildlife photographers. Although the lens itself doesn't have image stabilization, the built-in image stabilization provides good enough stabilization during video and photo shooting to prevent any problems with vibration. While it occasionally loses focus in backlit and low-light conditions, I can say that I mostly took flawless shots with accurate and fast autofocus. The only drawback I can mention about this lens is, unfortunately, the lack of teleconverter compatibility.
40-150mm;
This lens, whose build quality clearly indicates it's a professional lens, boasts incredibly fast and smooth autofocus even in low light. Its optical quality allows for exceptionally sharp photos. Equivalent to a full-frame lens (80-300mm) with an f/2.8 aperture, it provides sufficient aperture even when using a teleconverter, enabling high-quality video and photos for wildlife photography. Its wide aperture also creates a captivating background bokeh effect.
100-400mm;
Finally, regarding the 100-400mm lens, as someone who has done extensive wildlife photography and tested many pieces of equipment in the field for long periods, this lens absolutely justifies its price. Despite its weight and size, which won't tire you out during long hikes in the field, it offers an incredible advantage: a 200-800mm focal length equivalent to a full-frame lens. Even in the early morning hours with insufficient light, I had no trouble capturing the subject, even in flying photos, thanks to the smooth and fast autofocus. Even though my OM-5 body doesn't have bird's-eye tracking, I experienced no problems with autofocus or sharpness. I recommend an f/7.1 aperture; I achieved the sharpest results at this setting. As for image stabilization, it allows for handheld shooting even at a focal length of 400mm (800mm on full-frame).
I've prepared a video below for you to watch, which includes a detailed comparison, sample photos, and a sample video I shot with a 100-400mm lens.
Enjoy watching
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