what is 24mm on full frame
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16mm.
Take off a third (I think) off the Full Frame focal length to get the equivalent view in mm, on a crop sensor. That's for Fuji, Nikon, Pentax, Samsung and Sony sensors. The crop factor view on these cameras is 1.5x.
Canon sensors are slightly different, being either crop values of commonly 1.6x, or 1.2x.
For the Four Third sensor cameras need to be halved, as they have a 2x crop value..
Take off a third (I think) off the Full Frame focal length to get the equivalent view in mm, on a crop sensor. That's for Fuji, Nikon, Pentax, Samsung and Sony sensors. The crop factor view on these cameras is 1.5x.
Canon sensors are slightly different, being either crop values of commonly 1.6x, or 1.2x.
For the Four Third sensor cameras need to be halved, as they have a 2x crop value..
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Do you mean if you are using a 24mm on a full frame, what would it become on a crop body ? Then the answer is 38mm.
Nope. Tis the other way. 24mm x your crop factor whether it is 1.2 1.5 or 1.6. Always gives you a bigger number, not smaller. Hence crop cameras are often referred to as giving you more reach.
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If you are asking what would a 24mm lens be on a crop camera, the answer is 36mm (on a Nikon 1.5x). If you are asking what lens you should use on a crop to give the equivalent field of view as a 24mm on a full frame, the answer is 16mm (again assuming a 1.5x crop camera)
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Depends on whether you want to know the equivelent coverage or the resulting coverage when used on a crop sensor.
If equivelent coverage (ie. the same degrees of coverage on a crop sensor as you'd get on a full frame sensor) then you need a 16mm DX lens to get 24mm FF coverage
If you want to know what coverage you'd get using a 24mm lens on a crop body then the answer is 36mm. Note that regardless of whether the lens is designed for full frame or cropped bodies, the focal length of the lens will still be expressed in 35mm/full frame terms.
If equivelent coverage (ie. the same degrees of coverage on a crop sensor as you'd get on a full frame sensor) then you need a 16mm DX lens to get 24mm FF coverage
If you want to know what coverage you'd get using a 24mm lens on a crop body then the answer is 36mm. Note that regardless of whether the lens is designed for full frame or cropped bodies, the focal length of the lens will still be expressed in 35mm/full frame terms.
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I took the OP as asking what, on a cropped sensor, would be the equivalent lens be needed to get the same view as 24mm on a Full Frame sensor, not what would a 24mm lens view become on a cropped sensor, and if that is right, then Bardo and I are correct. 
People normally ask what the equivalent view of the cropped sensor to the Full Frame, but the OP asked it the other way around. I think. 
16mm DX lens = 24mm FF view
24mm FF lens = 16mm DX view
Maybe he/she will come back and clarify what they were after.
People normally ask what the equivalent view of the cropped sensor to the Full Frame, but the OP asked it the other way around. I think.
16mm DX lens = 24mm FF view
24mm FF lens = 16mm DX view
Maybe he/she will come back and clarify what they were after.
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Don't you mean...I took the OP as asking what, on a cropped sensor, would be the equivalent lens be needed to get the same view as 24mm on a Full Frame sensor, not what would a 24mm lens view become on a cropped sensor, and if that is right, then Bardo and I are correct.
People normally ask what the equivalent view of the cropped sensor to the Full Frame, but the OP asked it the other way around. I think.
16mm DX lens = 24mm FF view
24mm FF lens = 16mm DX view
Maybe he/she will come back and clarify what they were after.
16mm DX lens = 24mm equivelent FF view
24mm FF lens = 36mm view on DX sensor