The construction is very good all in metal. The 2 rings (aperture and focusing) have sufficient resistance , not too hard not too fluid.
Les 2 bagues : ouverture et mise au point sont crénelées et agréable à l'usage , ni trop dures ni trop molles.
Je ne conseillerai donc cet objectif qu'au spécialiste de la macro recherchant des effets créatifs.
Merci encore à Lionel pour m'avoir permis d'illustrer cet article avec ses photos prises en conditions réelles.
Hi Marc. I too have this lens and have not experience that centre softness as your image of your books, Several other testers including ePhozine remarked how good the centre sharpness this lens gives. I have a feeling it depends on luck as what you get from individual copies of this lens. I found the shift on my copy is rubbish on the a7rii but fine on my nex7. on the former I have to remove the hood as this appears in the image and even then I get very bad vignettes, I also don't like the fixed adapter and wish I got a Canon fitting to use with my metabones adapter instead. Thanks for your blog.