In celebrating the 40th anniversary of their SP Series Lenses (which stands for “Superior Performance”) Tamron is releasing what they call the “ultimate” lens, their new SP 35mm f/1.4 Di USD (Model F045) for full-frame DSLR cameras. You may recall that the development of this prime lens was announced in February, but details — including pricing and release information — were scarce. As it turns out, the longtime lens maker is pulling out all the stops for their new fast standard prime.
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https://www.imaging-resource.com/news/2019/06/06/tamron-is-pulling-out-all-the-stops-for-its-sp-35mm-f-1.4-di-usd-lens