Tamron 24mm f/2.8 Di III OSD M1:2 - Lab Test / Review
Lens Reviews - Sony Alpha (Full Format)
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Review by Klaus Schroiff, published August 2021


Following our review of the Tamron 35mm f/2.8 Di III OSD M1:2, let's go a little wider with the Tamron 24mm f/2.8 Di III OSD M1:2 - thus a moderate ultra-wide angle lens with typical applications such as street photography or landscapes. Other than its optical design and name, it is basically indistinguishable from its two in-house cousins (with the third one being the 20mm f/2.8). And at least regarding its pricing that's a good thing. At around 250 USD/EUR, it is among the most affordable prime lenses on the market.

For this amount of money, you can't expect professional-grade build quality. The chassis is made of average quality plastics based on a metal mount. The rubberized focus ring operates smoothly but there is a cheap feel to it. Surprisingly, the lens has some seals making it moisture resistant albeit there isn't a word about dust protection. While the length of the lens doesn't change during focusing, there's a moving inner lens tube. It isn't fully clear why Tamron designed the lens to be relatively long because this tube is quite deeply recessed by about 1.5cm. One aspect that differs from the 35mm f/2.8 is the petal-shaped lens hood - which in turn is the same as the one used for the Tamron 20mm f/2.8 Di III OSD M1:2.

The AF system uses a linear extension system. Typical for this focusing type, the AF speed is on the slow side but it's at least noiseless. The same can't be said about the aperture mechanism. When stopped down, you can hear that the camera is opening/closing the aperture during focusing operations. Once again, this has a cheap feel to it. As usual, manual focusing works "by-wire". A specialty of the lens is its close-focusing capability. It can focus down to a max object magnification of 1:2 (hence the M1:2 in the lens name). An image stabilizer has not been implemented which is hardly surprising given the price point.

Below is a family picture showing the 20mm f/2.8, 24mm f/2.8 and 35mm f/2.8.

Optical construction10 elements in 9 groups inc. 1x aspherical and 3x LD elements
Number of aperture blades7 (rounded)
min. focus distance0.12m (max. magnification 1:2)
Filter size67mm
Hoodpetal-shaped (bayonet mount, supplied)
Other featuresdust & moisture resistant
MountSony FE

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