Newbie needs help

Evening all can anyone tell me if a Kenko 1.4x teleplus pro 300 DG Canon Fit teleconverter will fit my canon 400d I'm new to photography sorry if it annoying

It will fit your camera. The greater issue is will it work on the lens you plan to mate it with.

Or this one Kenko 2x RSL Teleplus MC7 teleconverter (Rollei mount)

No2number2 wrote in post #16713784
Or this one Kenko 2x RSL Teleplus MC7 teleconverter (Rollei mount)

It needs to be canon EF mount.

I have 3 lenses ef 75-300mm 1:4-5.6 usm, canon zoom lens ef 28-80mm and a canon efs 18-55 mm

There is no reason to add it to the two wide angle zooms. It's not made for that and will just deteriorate your quality for no advantage. It should work on the 75-300, but that lens is pretty soft as it is, losing a stop of light and the sharpness you lose from adding an extender is questionable.

Plus you may lose autofocus on the 75-300. Your camera will only focus with a lens that has an aperture of 5.6 or larger and with the converter in place the lens becomes a f8 max and will lose autofocus on the long end.

Not really worth it when

No2number2 wrote in post #16713816
Not really worth it when

Probably not. It might be better to spend that money on a better telephoto lens. Sell the 75-300 and pick up the 55-250IS.

I'm only asking because I'm off to Kenya at Easter and thought it might be good to have

No2number2 wrote in post #16713819
I'm only asking because I'm off to Kenya at Easter and thought it might be good to have

Perhaps a rental would be a better option. I'm told you can rent in Kenya.

Worth thinking about I suppose

Apart from losing out on zoom what's better about the 55-250IS

No2number2 wrote in post #16713832
Apart from losing out on zoom what's better about the 55-250IS

Its sharper, and has image stabilization. (and dont confuse reach or length with zoom, zoom is the ability to use multiple focal lengths with one lens. All your lenses are zooms, only one is long). The 75-300 is an old film lens that canon continues to bundle with rebels. It was marginally sharp enough for low res film use, but doesnt stand up too well to higher resolution digital bodies.

I know they probably not worth it but will this fit CF1 Auto Teleplus 2x teleconverter for Canon 35 mm SLR only asking as he only want a fiver for it