Tokina ATX-M 33 mm f/1.4 X review - Distortion and field of view

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Tokina ATX-M 33 mm f/1.4 X

8 August 2022

Maciej Latałło

6. Distortion and field of view

First, let's deal with the field of view of the tested lens. We measured it by taking photos of starry sky and transforming pixel layout into the equatorial coordinate system. It allowed us to determine the field with a measuring error not exceeding 0.2-0.3 of a degree. Our result amounts to 45.6 degrees and is, in fact, in perfect accordance with the value of 45.7 degrees, declared officially by the producer.

Old, standard Gauss lenses could have a bit of problem with distortion, in some cases that aberration reached even -2%. The Tokina shows less problems in this catheogry but still in its case you can observe pincushion distortion. The results we got for JPEG and RAW files are, within the margin of error, the same, amounting to, respectively, +0.99% and +0.97%.

Such values aren't bothersome in any way but it must be said that an optically complex standard lens should correct distortion better, reducing it to practically zero.

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