jackpinoh wrote:
You make some good points. Allow me to suggest one correction and add some context.
1. The new OM Systems lens is 150-600mm, not 180-600mm.
2. The focal length of 150-600mm f/5-6.3 lens on a micro 4/3 camera is equivalent to a 300-1200mm lens on a full frame camera.
3. The Nikon 180-600 mm lens without the tripod collar is four ounces lighter than the OM 150-600mm lens, but if you add a teleconverter to the Nikon lens to get a focal length greater than 600mm, it will exceed the OM lens weight by four to six ounces.
4. To achieve the 1200mm field of view on the Nikon 180-600mm f/5.6-6.3 lens, you would need to add a 2x teleconverter which would give you 360-1200mm f/11-13, and you would need to raise your ISO two stops higher than the OM system, and the 2x teleconverter would result in a softer image.
5. Regarding lens weight: Two lenses can weigh the same, but the distribution of the weight in the lens is very important. If the lens center of mass is closer to the camera, the lens will be much easier to hand-hold than if the center of mass is further away from the camera. Unfortunately, data to assess this factor is not available for either lens.
6. The Nikon lens has a minimum focus distance of 4.5 feet; the OM lens has a minimum focus distance of 1.8 feet which, with its 1200 mm reach, gives it a macro capability.
7. The OM lens has sync-IS, which means the lens IS and the camera IBIS work together to provide 7 stops of image stabilization. The Nikon lens provides 5.5 stops of image stabilization.
8. The OM lens does not have internal zoom, but it does have an IPX1 certified water sealing and a fluorine coating on the front element. I don't think the Nikon lens has a weather certification, but I expect it to perform just as well in wet weather.
9. The OM lens also accepts teleconverters, but I recommend a tripod if you intend to use it at its 2400mm limit.
You make some good points. Allow me to suggest one... (
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