1 Nikkor Lenses Focal Lengths

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Panza

Senior Member
Hi everyone, I'm a bit confused at the focal lengths of the 1Nikkor lenses. I've been trying to read reviews and the term "equivalent" pops up often.

10-30mm is equivalent to a 27-82mm.

Does this mean that shooting with a a focal length of 10mm on a 1Nikkor camera will feel like shooting at a focal length of 27mm on one of my DSLR's? It's been a while since I've had a point and shoot and I'm not going to go with another digital camera so I'm doing my research now, loyal to Nikon no matter how many people say it's overpriced. Thanks for the clarification.
 
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WayneF

Senior Member
Panza said:
Hi everyone, I'm a bit confused at the focal lengths of the 1Nikkor lenses. I've been trying to read reviews and the term "equivalent" pops up often.

10-30mm is equivalent to a 27-82mm.

Does this mean that shooting with a a focal length of 10mm on a 1Nikkor camera will feel like shooting at a focal length of 27mm on one of my DSLR's?
Click to expand...

Yes it means the field of view is the same as on the other camera, but only if a FX DSLR.
Not a DX DSLR.
It is actually comparing to 35mm film cameras, but which is same as FX digital camera.
But not DX DSLR.


Your numbers are showing a crop factor of 2.7 (10mm x 2.7 = 27 mm FX or 35mm film)

A Nikon DX DSLR has a crop factor of 1.5. (On DX, 18mm x 1.5 = 27mm FX field of view)

A Nikon FX DSLR has a crop factor of 1 (not cropped, relative to 35 mm film).
So 35mm film, or FX either - 27 mm shows as 27mm, but is same field of view as your 10mm field of view.


FWIW, since 2.7 / 1.5 = 1.8, then the crop factor which compares to a DX camera would be 1.8.

Your 10mm x 1.8 = 18 mm field of view on a DX DSLR.

18mm DX x 1.5 = 27 mm field of view on a FX DSLR.

Or your 10mm x 2.7 = 27 mm field of view on a FX DSLR
 
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P

Panza

Senior Member
WayneF said:
Yes it means the field of view is the same as on the other camera, but only if a FX DSLR.
Not a DX DSLR.
It is actually comparing to 35mm film cameras, but which is same as FX digital camera.
But not DX DSLR.


Your numbers are showing a crop factor of 2.7 (10mm x 2.7 = 27 mm FX or 35mm film)

A Nikon DX DSLR has a crop factor of 1.5. (On DX, 18mm x 1.5 = 27mm FX field of view)

A Nikon FX DSLR has a crop factor of 1 (not cropped, relative to 35 mm film).
So 35mm film, or FX either - 27 mm shows as 27mm, but is same field of view as your 10mm field of view.


FWIW, since 2.7 / 1.5 = 1.8, then the crop factor which compares to a DX camera would be 1.8.

Your 10mm x 1.8 = 18 mm field of view on a DX DSLR.

18mm DX x 1.5 = 27 mm field of view on a FX DSLR.

Or your 10mm x 2.7 = 27 mm field of view on a FX DSLR
Click to expand...
Thanks for the clarity, it reads a bit confusing because of all the numbers but it's not as bad as calculus. : )
 
Eduard

Eduard

Super Mod
Staff member
Super Mod
This might help too:

Sensor-size-diagram.png

(image directly linked from Nikon Rumors)
 
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