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Placed between the camera body and lens, a teleconverter contains a set of optics that will effectively increase the focal length of any lens with which it is used. KENKO Teleplus Pro 300 converters are made with precision quality multicoated optical glass supplied by Hoya Corporation, the worlds largest manufacturer of optical glass. These glass elements are designed to match the optical quality of the prime and telephoto zoom lenses (even at the edges). The optical design of the elements and light path is wide enough not to cause vignetting.
The PRO 300 family are designed to work best with telephoto zoom lenses of 100 mm and above. The PRO 300 can be used with telephoto zoom lenses as well as prime lenses, however Kenko does not recommend them for zoom lenses that have a range starting at under 50 mm. Full AF operation with the PRO 300 2.0x is possible when using camera lenses with a maximum aperture of F2.8 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera's AF sensors. (Manual focusing is required when using lenses with smaller maximum f-stop value than those given above.)
Image quality is good when used with cannon 70-300 mm EF lens. Auto focussing is good but only at fast shutter speeds of 1/500 or more, but manual focussing recommended . Read morePublished 1 month ago by S
Husband loved this took brill photos at friends wedding brill memory'sPublished 2 months ago by nana carole
2 weeks delivery window and didn't make it within that time frame - disappointingPublished 2 months ago by MR DAVID SIMMONDS
Very very good value, auto focus does work on my long Canon lens, although it may "hunt" occasionally, this is a very good extra for those who have moved up to a proper... Read morePublished 3 months ago by M. J. Wishart
Fitted this to my 75-300mm lens and worked brilliant with both my Canon 6D and 550D.Published 3 months ago by Amazon Customer
It is not made clear in the product description that this may not fit some lenses. The lens I really wanted it to fit is one such lensPublished 4 months ago by KEVIN GAINFORD
On the plus side, auto focus worked sometimes with an EF 70-300mm f/4-5.6L IS USM on full zoom on a 60D. Image stabilisation and metering work well. Read morePublished 4 months ago by Mark H