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Using the D800 in DX mode

richardd300

Dyserth, UK
4567 posts

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"RE: Using the D800 in DX mode"

richardd300 Silver Member Nikonian since 19th Apr 2009
Thu 23-Feb-12 01:30 PM | edited Thu 23-Feb-12 01:32 PM by richardd300

Roger. probably me, as I use reach a lot, sorry.

On an FX camera a non DX lenses focal length is exactly the lens size in millimetres. So, a 300mm AF-S non DX lens will have a focal length of 300mm. However, if you transfer that lens to a DX body e.g. D2x, D300, D7000 etc then the "smaller or APS-C sensor" gives a factor of x1.5, so on a DX camera the lens is 450mm equivilent focal length. If on the D700 or D800 one uses the DX facility then the camera only uses the same area of sensor (approximately) as that of a DX camera. The disadvantage mainly is one ends up with a small file size, approximately 5Mb on DX mode on a D700 because only a proportion of the FX sensor is used.

So, as I have all e.g.Full frame FX lenses then on my D700 they match the focal length of the lens. By extra reach I meant that the lens gets closer to the subject because of it's increased focal length on a DX body.

That's my very simple, not expansive way of explaining it. I am sure others will expand on it.

Hope that helps

Richard

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This is a hot, active topic! Using the D800 in DX mode [View all] , RRRoger Silver Member Fellow Ribbon awarded for his long history of demonstrated excellence and helping other members with equipment, technique and DSLR video in the true Nikonians spirit. , Mon 20-Feb-12 12:23 AM
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