Rongnongno Loc: FL

Funny that through selective reading and complete misunderstanding this FX lens on a DX became an argument.

gngngngn you need an extender to change the magnification... No, you need a crop like a FX lens on a DX body. Angle is smaller so magnification so... But never-mind that.

gngngngn there is no change of perspective... Yes, there is due to the angle variation but never-mind that.

To fill a sensor with the same FAR capture one needs to step back only one problem, the close capture is different due to the angle change* but never-mind that.

In camera crop (Blue = DX body with FX lens)


Results of walking back to match the same far view.


Everything between the blue/red lines is added to the capture**. But never-mind that too. After all UHH is the la-la-la land at times.

Then there is light quality difference (posted and explained by someone else).

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* Sorry did not find a smaller graphic to illustrate this.
** Note that this works for a prime lens. When dealing with a zoom you can recreate the same view you would have taken with a DX lens by dividing the FX focal length by 1.5 so to reproduce a 200mm lens point of view using a FX lens on a DX body you must use 133.33 mm. As a zoom opens/closes (varies) the angle.

Ira

I've used that lens and camera combination and it works great. The 70-200 f4 is one of the sharpest Nikon zooms and the D7200 has no filter anti-aliasing filter, resulting in very crisp images. The DX crop factor makes this camera and lens combination equal to a 105-300mm lens- great for close birding (lot of feather detail).

Wood Stock c/u shot with a Nikon D7200 and Nikon 70-200 f4 @ 1/800 f6.3 ISO 500 @ 200mm

(Download)

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

It's still a 70-200. No more magnification than if you cropped in post processing. Perspective, depth of field remain the same. If you changed the focal length both perspective and depth of field would change.

Rongnongno Loc: FL

You are walking on the side of your shoes today. Read what is being said, not what you think what is being said.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

"The crop factor is sometimes referred to as "magnification factor",[4] "focal length factor" or "focal length multiplier".[5] This usage reflects the observation that lenses of a given focal length seem to produce greater magnification on crop-factor cameras than they do on full-frame cameras."

"A given lens casts the same image no matter what camera it is attached to. The extra "magnification" occurs when the image is enlarged more to produce output (print or screen) that matches a standard output size. That is, the magnification, as usually defined from subject to focal plane, is unchanged, but the system magnification from subject to final output is increased."

In the first quote - "seem" is the operative word.

Wenonah Loc: Winona, MN

Could he be referring to this post of yours?

"This is the first time I hear of a FX lens adjusting to a DX body. Care to provide a link?"

G_Manos Loc: Bala Cynwyd, PA

mas24 Loc: Southern CA

And perhaps loss of megapixels, using a DX lens on a full frame Nikon camera?

CatMarley Loc: North Carolina

I am beginning to understand why this country's politics are so messed up these days - if something so simple as a lens can become so complicated on a forum like this!

G_Manos Loc: Bala Cynwyd, PA

But I guess that's why it's called a Forum . . .

dcampbell52 Loc: Clearwater Fl

actually a juvenile wood STORK... lol but you probably knew that. Nice shot. And yes, I have both a DX camera (D7100) and an FX camera D610. I use FX lenses on both (mainly because it makes it so that I can use all of my lenses on either camera easily). Yes DX lenses (on Nikon) will work automatically and if the menu is set appropriately on the FX camera it will automatically switch to DX mode or if not, it will only expose the center 2/3rds of the FX sensor giving a round image that when cropped would be the same size as a DX sensor would give natively. I don't know about how Canon deals with DX vs FX but Nikon makes sure that virtually all Nikon FX lenses will work on all DX cameras with the following exception. Older Nikon lenses that require a focusing motor in order to auto focus will only work automatically on the D7XXX (that's the D70s, D7000, D7100, D7200 etc. cameras in the DX line. There may be others but the camera must have the focus motor built into the body in order to work. All FX and DX lenses with the motor built into the lens (SWM or Silent Wave Motor) will work on all DX and FX camera bodies. The only other exception is that Nikon lenses produced (I think the date is before 1984 but not sure) will not necessarily work on either camera due to changes in the mounting.

AnthonyBiss Loc: Toronto, Ontario

Well explained on the difference between the two format

Rongnongno Loc: FL

Yup, because he does not understand that the question is addressed to someone else.

cfbudd Loc: Atlanta, Georgia

Incredible, isn't it?

goring2

Agree 100%.