This lens hood is to be screwed onto a 62mm thread and does not use the vendor-specific GeLi-bayonet. The advantage: It fits in a variety of products with the filter thread; The disadvantage: the screwing takes longer; and when the filter thread rotates during focusing, also the bezel rotates and possibly produces vignetting. Because it must meet the needs of many different types of lenses and focal lengths do justice, the effect at long focal lengths is necessarily limited; here achieved an elongated orifice to better effect. But better that than garnix. The material is a little softer than usual in order, the plastic and can therefore tolerate bumps or intercept quite well.
Tip: Before placing any order if the ordered lens a lens hood supplied includes: in the mentioned Tamron 70-300 a suitable aperture is namely - and the appointment of the Universal panel is totally unnecessary.