Focal Lenght Multiplier in Nikon DX and FX: a doubt

[Cegonha]

I have a Nikon D5000, and I bought a Tamron 17-50 f2.8. Now, I'm looking for buying a macro lens that could be used as portrait too, such as the Nikon AF-S Micro-Nikkor 60mm f/2.8G ED Macro.

But, this lens is marked as "N", instead of DX.

I've studied a little and found (in 123di suite, recommended by the way!) that the D5000 has a focal lenght multiplier of 1,52.

This would means that the 60mm Macro would capture pictures in fact, for my camera, like a 90mm lens?

On the other hand, DX marked lenses (Nikon) would consider this FLM already into them, so my 18-55 kit lens would be the real 18-55mm, correct?

Would this apply to Tamron? Should I multiply the marked focal lenght by 1,52? Also, would a Nikon "N" lens work with my D5000?

Thanks!!!

[kirbinster]

Not sure about that "N" as to what it means, but you will multiply the stated focal length of ALL lenses when used on your D5000 by 1.5, that is because it uses a DX size sensor.

[Aegea]

The focal length is an intrinsic physical quality of the lens, not the camera. So the 60 will capture images "like" a 90 would on a full-frame camera, and the 18-55 will capture images "like" a 27-82 would on a full-frame camera, using the 1.5x factor.

[jdepould]

N just means Nano crystal coating. It's a newish coating that's supposed to cut down on internal reflections. It's like a lens being marked ED, it has nothing to do with full frame or crop.

The focal length ratings on DX lenses are the same as FX lenses. A 50mm DX and 50mm FX would have the same (or roughly the same) field of view on a DX body. The FX simply has a larger image circle.

[Cegonha]

Ok, thank you very much!!!!

I got it now... Will keep focus on the focal lenght, not DX, FX, N, etc.... letters combinations!!!

Regards

GS

[OsmosisStudios]

Originally Posted by Cegonha

Ok, thank you very much!!!!

I got it now... Will keep focus on the focal lenght, not DX, FX, N, etc.... letters combinations!!!

Regards

GS

Not necessarily: You have to keep certain sections in mind

Because you have a D5000, you need lenses designated AF-S in order to get autofocus.

Also keep in mind that VR (vibration reduction) is very useful and, if you have plans to go to full-frame, your DX lenses are going to be severely hindered.