Zoom Lense

Started Feb 21, 2014 | Questions thread
j_photo Veteran Member • Posts: 3,351
Re: Zoom Lense

T O Shooter wrote:

The 55-300 is a DX lens ( you have a DX camera ) so the focal length will be 55-300

The 70-300 is an FX lens ( you have a Dx camera but can use it ) so you will have an effective focal length of 105 to 450


Photography - I do it for passion, not for a buck! It's just better that way.

This is wrong. Whether a lens is DX or FX does not change it's focal length characteristics. At 300 mm both lenses will have the same field of view, same focal length, and same "effective" focal length.

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