Tamron 17-28 mm f/2,8 Di III RXD (Modèle A046)

[Mistral75]

Mise à jour en version 3 du logiciel embarqué du Tamron 17-28 mm f/2,8 Di III RXD pour corriger le bug indiqué dans le message précédent :

Contenu de la mise à jour : https://www.tamron.jp/en/support/popup/a046.html#SO

Lien de téléchargement : https://www.tamron.jp/en/support/a046_firmware.html

Procédure de mise à jour : https://www.tamron.jp/en/support/a046_update.html

This update improves the following issues:

When you use flashes, there is a delay from the time the shutter button is pressed to the time the shutter and the flash release.

Applicable camera models: Alpha 7, Alpha 7 II, Alpha 7R, Alpha 7R II, Alpha 7S, Alpha 7S II, Alpha 5000, Alpha 5100, Alpha 6000, Alpha 6300, Alpha 6500, NEX-3N, NEX-5R, NEX-5T, NEX-7, NEX-F3, NEX-6

[Mistral75]

Essai du Tamron 17-28 mm f/2,8 Di III RXD sur Sony Alpha 7R II par Klaus Schroiff pour Optical Limits :

Tamron 17-28mm F/2.8 Di III RXD - Review / Test Report

Commentaire introductif de Klaus sur le forum : "Good value."

Qualité optique : 3,25/5
Qualité mécanique : 4/5
Rapport performances / prix : 4,5/5

The Tamron 17-28mm f/2.8 Di III RXD delivers a quite convincing performance with just a few caveats. Considering its ultra-wide character, it's pretty sharp where it counts the most - the wider settings. The center quality is great and the borders/corners also on a comparatively high level between 17mm and 21mm. Many ultra-wide zoom lenses struggle a bit at their "long" end and the Tamron is no exception in this respect. While the results are good from f/5.6, the outer image field could be better at larger aperture settings here. The native distortion characteristic is very decent for such a lens and there's nothing to worry about with image auto-correction. The vignetting figures are roughly in line with other lenses in this class. Reads: there's some hefty vignetting at f/2.8 in RAW images. Auto-correction eases this is a bit but, a bit surprisingly, Tamron chose a non-aggressive correction profile here so you may still be able to spot some light falloff depending on the shooting conditions. The bokeh has its pros and cons. Out-of-focus highlights are comparatively nicely rendered whereas the overall rendition can be a bit harsh.

The build quality is very good relative to its price tag. And whether you like the somewhat plasticky body material or not is also a matter of taste. However, an indisputable advantage of this approach is the very low weight of just 420g - and we are talking about an f/2.8 lens here. Unlike its fast, in-house zoom mates, it doesn't extend when zooming which is always something that we book on the plus side. The "moisture-resistant construction" seems to be somewhat inferior to other manufacturers - namely, there's no word about dust protection. However, we are talking in the context of a consumer-grade lens here. We quite liked the RXD AF motor on the 28-75mm f/2.8 but on the 17-28mm f/2.8, it's a bit on the slow side. This is usually no deal-breaker in this class though.

Overall, the Tamron 17-28mm f/2.8 Di III RXD is a solid performer. It doesn't excel in any criteria but it does the job and, possibly more important than that, it does so for a reasonable price.

[Hulotphoto]

Interne zooming apparemment ?

[thierry h]

couplé au A7III, il est très bon

[Attacus]

Sinon, il faut considérer le Tamron 17-35 f2.8/4 + bague mc11
Pas cher, meilleur piqué et contraste que le Zeiss 16-35 F4 !

[Mistral75]

Selon 相机Beta (Camera Beta), d'ordinaire bien informé, Tamron sortirait d'ici la fin de l'année le 17-28 mm Di III VXD G2.

https://www.weibo.com/5029300214/Lr8yakzi6

Le remplacement du moteur pas-à-pas (RXD = Rapid eXtra-silent stepping Drive) par un moteur linéaire (VXD = Voice-coil eXtreme-torque Drive) permettrait une mise au point plus rapide et plus précise.

[PBnet2]

Testé hier sur A7 IV, vraiment très très bon !