Is 200mm on a 1.6x crop enough?

Started Oct 18, 2018 | Questions thread
drj3 Forum Pro • Posts: 13,165
Re: Is 200mm on a 1.6x crop enough?

See the attached link for a Field of View calculator. You can put in the actual focal length (200mm), the distance and put in the sensor size and it will give you the height and width of the field of view in the distance units. This way you can see how close you would need to be in order to fill the frame with a given size bird with a 200mm lens. The 200mm lens on your camera could be sufficient for larger birds, especially those that adapted to human presence.

While you can sometimes approach stationary birds to decrease the distance and the need for a longer focal length, there is not much you can do for birds in flight or small birds in trees.  A 300mm lens (480 FF equivalent FOV) on your camera would be better.

However, most birders will always want a longer focal length.  I generally use a 420mm lens on my 2X crop camera and often would like a longer lens.

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