Tamron 17-70 mm f/2,8 Di III-A VC RXD

[Mistral75]

Essai du Tamron 17-70 mm f/2,8 Di III-A VC RXD en monture Fujifilm X sur Fujifilm X-S10 par John Riley pour ePHOTOzine :

Tamron 17-70mm F/2.8 DI III-A VC RXD Fujifilm X Mount Lens Review | ePHOTOzine (3 + 1 pages)

Points forts :

- excellent piqué
- aberrations chromatiques bien contrôlées
- vignetage modeste
- pratiquement aucune distorsion
- 5 stops de stabilisation
- protégé contre la poussière et l'humidité
- bokeh détendu [?] et onctueux
- prix raisonnable
- maniement aisé.

Point faible :

- le piqué diminue aux toutes petites ouvertures.

Highly Recommended – An excellent choice as a high quality standard zoom lens with great handling.

The pre-production verdict was, "The new lens is an exciting prospect for Fujifilm users, being fast and efficient, and if the final quality is as good as it looks as though it could be, a winner. The range offered is perfect for general use, and the lens lends itself to many different styles of photography, be it reportage/street, architecture, close sports, portraiture, landscape or still life."

So, does the full production lens come up with the goods? The short answer is yes, it does. Sharpness is excellent and well maintained as we zoom in. Bokeh is pleasantly smooth and relaxed. The other technical requirements are well met. The handling is ultra-smooth and ergonomically sound. In addition, the less easily defined overall look of the images is extremely attractive. This is a lens that can be happily used for most of our general shooting in all the various genres mentioned above and more.

"Highly Recommended".

Deux remarques :

- j'aimerais qu'on m'explique ce qu'est un bokeh détendu ("relaxed bokeh")
- le point faible trouvé au Tamron est valable pour à peu près tous les objectifs, les lois de la diffraction étant ce qu'elles sont.

[Powerdoc]

bokey détendu est l'inverse de bokey nerveux. Normalement c'est un sentiment de douceur qui doit prévaloir. Il est toujours difficile de donner des qualificatifs pour décrire un bokey

[Mistral75]

Mise à jour en version 2 du logiciel embarqué du Tamron 17-70 mm f/2,8 Di III-A VC RXD en monture Fujifilm X.

Contenu de la mise à jour : https://www.tamron.jp/en/support/popup/b070.html#FF

Page de téléchargement : https://www.tamron.jp/en/support/x-mount_firmware.html

Procédure de mise à jour : https://www.tamron.jp/en/support/x-mount_update.html

This update improves the following:

VC shall function when the shutter button is pressed halfway under the following settings.
- "IS MODE": "SHOOTING"
- "FOCUS MODE": "AF-C"

[Alain c]

Merci mistral pour ce partage,
MAJ faite sans problèmes 

[Mistral75]

Essai du Tamron 17-70 mm f/2,8 Di III-A VC RXD sur Sony Alpha 6300 et Alpha 7R V en mode APS-C par Klaus Schroiff pour Optical Limits :

Tamron 17-70mm f/2.8 Di III-A VC RXD - Review / Test Report

Commentaire introductif de Klaus sur le forum : "Good optically ... less so mechanically. "

Qualité optique : 3,75/5
Qualité mécanique : 2,5/5
Rapport performances / prix : 4/5

The Tamron 17-70mm f/2.8 Di III-A VC RXD is a bit like Jekyll and Hyde - it's a curious mixture of good and bad things making your purchasing decision a bit more interesting than usual. On the positive side, there is, of course, the very high resolution, and that's straight from f/2.8. It is easily comparable to the best in class in this respect. 70mm may lack a little bit of contrast at f/2.8, though. Image distortions are quite normal for a modern zoom lens for mirrorless cameras - they are quite high at the extreme ends of the range without being excessive (unlike on the Sony E 16-55mm f/2.8 G at 16mm which is almost a fish-eye). Auto-correction will, of course, take care of fixing this. The amount of vignetting is very obvious in RAW files at 17mm f/2.8 and 70mm f/2.8, but, once again, auto-correction is giving a helping hand for this. The same goes for lateral CAs, which are slightly higher than average. The lens has been criticized for the quality of its bokeh, and we can see where this is coming from. Out-of-focus highlights are roughly rendered - but this isn't unheard of among standard zoom lenses. The bokeh in the focus transition zone is actually quite decent. You may spot the occasional colored ghosting when shooting into extreme light sources, but in more conventional scenes, you should be good.

While we are quite impressed by the optical performance (after auto-correction), the build quality isn't on the same level. This certainly "feels" like a consumer lens rather than targeting professional users. The plastic used for the lens body is a bit on the cheap side. Our sample also exhibited zoom creeping despite having a fairly lightweight inner lens tube. Tamron also omitted the usual switches for AF and image stabilizer, which is something you'd normally expect in a mid-level offering. The high AF speed and the efficient image stabilizer are on the plus side again.

If your only desire is high image quality, the Tamron 17-70mm f/2.8 Di III-A VC RXD is probably a winner. If you enjoy having tank-like build quality, you should look elsewhere, though.