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2x Tele Extender on
Canon Rebel t7-2000D

by John
(UK)

Canon Rebel t7 (2000D)

Canon Rebel t7 (2000D)

I have a canon EOS 2000d and a EF 75-300mm lens. Can I use a 1.4 or 2 x extender ?

Hi John from the UK!

Thanks for asking about compatibility of using either a 1.4x or 2x tele-converter between your Canon 2000D(t7 here in the USA) camera and an EF 75-300mm lens.

The first thing to know is that EF lenses, like the 75-300, will work perfectly on both full frame Canon DSLRs as well as crop sensor (APS-C) cameras like the t7. You do need to remember there is a 1.6X crop factor.

Teleconverter Compatibility

Secondly, the EF tele-converters are made specifically for EF telephoto lenses where there is ample room within the back of the lens barrel to fit the protruding lens elements on the teleconverters. See the photo below.
Canon teleconverter and 70-200mm lens
Yes, it fits.
Canon teleconverter and 70-200mm lens


Generally speaking, most wide-angle, normal focal length, and moderate telephoto lenses are not compatible with teleconverters because they're designed to work with super-telephoto lenses. There are some exceptions.
Canon teleconverter and 75-300mm lens
Protruding lens elements clash
Canon teleconverter and 75-300mm lens


Although I've never personally tried to attach a teleconverter to a 75-300mm lens, I don't believe it will work. John, this is likely not the answer you were hoping for, but I hope it helps you. Feel free to comment if you have any other questions. :-)

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Canon Rebel t7-2000D

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Extenders with zooms
by: Stephen BP

My experience is slightly different in that I tried to use the 2x and the 1.4x converters with the 100-400 mk2 lens. This lens is amazing but what with the converters attached it was a total waste of time. The best description is ‘mushy’. I even traded in my 2x converter.
I now use the 1.4x converter with the 600mm f4. The results are stunning. I wish I’d kept the 2x!!

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