Can I use a Kenko tele­con­verter with my D5500 and Tam­ron SP AF 70-300mm f/4-5.6 VC USD lens? Terry Vick, via email

NPhoto - - Nikopedia -

Ja­son says... Most 70-300mm tele­photo zooms can’t be used with tele­con­vert­ers, be­cause the rear lens el­e­ment isn’t re­cessed and fouls on the pro­trud­ing front el­e­ment of the tele­con­verter. The Tam­ron 70-300mm is an ex­cep­tion and can be used with a Kenko 1.4x or 2x tele­con­verter. There’s likely to be some degra­da­tion in sharp­ness but the ma­jor catch is that with a 1.4x or 2x tele­con­verter, the widest avail­able aper­ture at 300mm is re­duced to f/8 or f/11 re­spec­tively. In both cases, aut­o­fo­cus be­comes im­pos­si­ble on the D5500, which doesn’t sup­port aut­o­fo­cus with f/8 lenses. You’ll also find that you’ll need bright light­ing to en­able suf­fi­ciently fast shut­ter speeds, un­less you mas­sively in­crease your ISO set­ting.

The Kenko Tele­plus PRO 300 DGX 1.4x and 2.0x tele­con­vert­ers are best used with a ‘faster’ Tam­ron tele­photo lens, like the 70-200mm f/2.8

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