using fx lens with nikon dx body (Page 5): Those who have educated themselves know that FX lenses perform equally well on DX bodies with no loss of light , and that DX lenses meet very...

Leitz Loc: Solms

catchlight.. wrote:

There are optical unintended differences that are "acceptable" but the FX lens was designed for use on an FX body. Otherwise there would be no need for the dx series. Smaller sensor cameras will loose one stop of light as an added negative. The comment is propaganda from a person who does not understand the difference and has an assumption based on a lack of understanding. Sorry if that sounds too negative but its true.

Those who have educated themselves know that FX lenses perform equally well on DX bodies with no loss of light, and that DX lenses meet very definite needs for many users.

therwol Loc: USA

epstju wrote:

my granddaughter wants to use Nikon 7-200 f.4 with nokon camera 7200 dx camera with fx lens can,t afford fx camera what do you think thanks

Which 70-200 f4? The most recent version with autofocus and VR is 100% compatible with your camera. If you're talking about the much older manual focus lens, you'll need to enter data about the lens into the camera through a menu (no chip in the lens), You will also have to focus manually.

camerapapi Loc: Miami, Fl.

Well, that is a new one for me John. I wonder where did you learn that a full frame lens performs better than a DX lens.
A full frame or FX lens will work very well with a DX body but it has its advantages when used with a FX body especially for depth of field.
Look again because using the same lens with a FX or DX body it will be very difficult optically to see the difference.

goring2

This is what Mr. Ken Rockwell says on this subject:

"As a DX lens, it only works properly on DX cameras.

Don't use it on an FX cameras. If you do, the camera will crop and only use half of the big sensor for which you paid.

You can't cheat; I've tried and this lens always has black corners on full frame at every focal length setting."

MtnMan Loc: ID

Silverman wrote:

So, FX lens on a DX body...OK
But a DX Lens on a FX body....Not a good idea

OK also...with limitations. Most FX bodies can auto detect and switch to use DX image area. Or you can do it manually.

Some DX lenses work well over part of the zoom range using image areas up to full FX.

MtnMan Loc: ID

goring2 wrote:

This is what Mr. Ken Rockwell says on this subject:

"As a DX lens, it only works properly on DX cameras.

Don't use it on an FX cameras. If you do, the camera will crop and only use half of the big sensor for which you paid.

You can't cheat; I've tried and this lens always has black corners on full frame at every focal length setting."

So you should drive your car at full speed all the time to use the engine you paid for?

Rockwell is a good source but must be taken with caution.

dcampbell52 Loc: Clearwater Fl

Leitz wrote:

Those who have educated themselves know that FX lenses perform equally well on DX bodies with no loss of light, and that DX lenses meet very definite needs for many users.

The reason for FX cameras is that the sensor size is (roughly) the same size as a 35mm film frame (hence the term Full Frame). DX was the original "35mm" size for digital photography because of the cost of producing sensors. The pixels on an FX sensor are roughly 1/3 larger than the pixels are on a DX camera with the same resolution. This gives the FX camera the ability to have better low light capability, faster ISO, etc. Nikon has 3 levels of cameras: Entry level, which is a lighter weight, lighter duty camera that is intended for entry level (vacations, general photography and light to moderate use). These cameras have the D3xxx such as the D3300, D3400 etc. and the D5xxx such as the D5100, D5200, etc. Then Nikon has the Advances amateur/entry level pro or prosumer level which is the D7000, D7100, D7200, D500 in crop or DX cameras and in the FX category for advanced amateur or prosumer they have the D600, D610, D750 and D/f cameras.
In the Professional level they have the D810, D810a and the F5. Note that there are predecessors in each of the areas.

Yes there are advantages to FX over DX but there are also advantages to DX over Fx. In my case, I have both. I use the FX when I want to use wide to normal lenses. I use my DX when I want a little extra reach and I use both effectively. I have a good Nikkor 50mm f/1.4 lens that is a good and fast general lens on the FX camera and it is really good for portraits and has great bokeh on the DX camera. It doesn't have the silent wave motor but is still auto focus and auto exposure on my D7100 and on my D610. I have a Nikkor 80-400 that has really good reach on my D7100 for nature shots without loosing the 1 stop penalty or so that you would have with a tele-converter. This lens also work great on the D610 as it was designed for FX bodies.

dcampbell52 Loc: Clearwater Fl

goring2 wrote:

This is what Mr. Ken Rockwell says on this subject:

"As a DX lens, it only works properly on DX cameras.

Don't use it on an FX cameras. If you do, the camera will crop and only use half of the big sensor for which you paid.

You can't cheat; I've tried and this lens always has black corners on full frame at every focal length setting."

Of course it does. Its a DX lens. It ONLY exposes the DX portion of the camera. If you go into the FX camera menu you can set if for DX. I don't know why you would but you can.

I never use my DX lenses on my FX body but I constantly use my FX lenses on my DX body.

Rab-Eye Loc: Indiana

To my mind, the biggest advantage of FX lenses on a DX body is that if you ever decide to upgrade to full frame, you will not have to replace all of your glass. That was the determining factor in my deciding to go with the D500 instead of the D810 when I replace my D300S. I have all the glass I need in DX, so I would have to replace all of them for full frame body, or use the smart crop feature of the D810, which effectively eliminates any advantage of the full frame body!

Kissel vonKeister Loc: Georgia

Rongnongno wrote:

If this is 'can she live with that' that surprises you, the zoom becomes quite powerful and there is a need to step back quite a bit when there a 'wider capture' is needed. ... The angle will still be very narrow and the perspective different from the original value...

Focal length has no effect on perspective. Camera-to-subject distance determines perspective.

Leitz Loc: Solms

dcampbell52 wrote:

Yes there are advantages to FX over DX but there a... (show quote)

In addition to the uses you mention, I use my DX camera a lot for close-ups. More magnification at equal distances. The 85 f/3.5 Micro-Nikkor DX is small, light and quite sharp.

Leitz Loc: Solms

Kissel vonKeister wrote:

Focal length has no effect on perspective. Camera-to-subject distance determines perspective.

As Rongnongno stated.

CatMarley Loc: North Carolina

Kissel vonKeister wrote:
Focal length has no effect on perspective. Camera-to-subject distance determines perspective.

Leitz wrote:

As Rongnongno stated.

NOT! We have been through this many times. Perspective is a function of distance not focal length. Changing the focal length may induce you to change distance to your subject, thus your perspective.

Leitz Loc: Solms

What do you mean, "NOT"?? That's precisely what Rongnongno, Kissel vonKeister and I have agreed on!!

dcampbell52 Loc: Clearwater Fl

Rab-Eye wrote:

To my mind, the biggest advantage of FX lenses on a DX body is that if you ever decide to upgrade to full frame, you will not have to replace all of your glass. That was the determining factor in my deciding to go with the D500 instead of the D810 when I replace my D300S. I have all the glass I need in DX, so I would have to replace all of them for full frame body, or use the smart crop feature of the D810, which effectively eliminates any advantage of the full frame body!

True and shooting DX through an FX lens means that you're only using the center 2/3rds of the lens so theoretically you're in the sweet spot of the glass.