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Nikon 12-24mm Tokina 12-24mm Sigma 10-20mm Tamron 11-18mm

Nikon 12 - 24 mm f/4, Tokina 12 - 24 mm f/4, Sigma 10 - 20 mm f/4 - 5.6 and Tamron 11 - 18 mm f/4.5 - 5.6.
Click an image to get it from Adorama. Also try Amazon. It helps me if you get yours at either one.

Index

All have excellent linearity. The focal lengths are well spread out along the zoom ring.

All hold focus well while zooming. You can zoom in or out and the focus stays put.

Nikon
Tokina
Sigma
Tamron
Direction
Standard
Standard
Standard
Standard
Ring Location
Front
Rear
Rear
Rear
What moves?
Front group rotates and moves independently of filter threads. Rear group moves but does not rotate.
Front and rear groups move independently of body and filter threads. Nothing rotates.
Entire front section of lens housing moves in and out but does not rotate. Rear group moves but does not rotate.
Entire front section of lens housing moves in and out but does not rotate. Rear group moves but does not rotate.
EXIF Encoding
Can read 1mm low mid-scale
OK
OK
OK
Marked at
12, 15, 18, 20, 24 mm
12, 15, 18, 20, 24 mm
10, 12, 14, 17, 20 mm
11, 13, 15, 18 mm
Feel
Dry, moderately light and precise.
Damped, greased, precise and solid.
Greased, smooth, heavy and precise.
Dry, precise and light.
Linearity
Excellent
Excellent
Excellent
Excellent

That's it! Thanks for reading and feel free to help if you've found the weeks I spent on this helpful.

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