Extender/Teleconverter

Started May 28, 2012 | Discussions
RaleighSenior New Member • Posts: 1
Extender/Teleconverter

I'd like to add an extender/teleconverter between my Canon EOS 500 (Rebel T1i) and Canon EF-S 55-250mm lens. Is there a 1.4x or 2.0x extender/teleconverter which will fit and retain the autofocus and image stabilization features?

Canon EOS 500D (EOS Rebel T1i / EOS Kiss X3)
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Y0GI Veteran Member • Posts: 5,253
Re: Extender/Teleconverter

RaleighSenior wrote:

I'd like to add an extender/teleconverter between my Canon EOS 500 (Rebel T1i) and Canon EF-S 55-250mm lens. Is there a 1.4x or 2.0x extender/teleconverter which will fit and retain the autofocus and image stabilization features?

Unfortunately, not. There are some that you can mount on the front of the lens, but I wouldn't do it, because of the weight of the TC hanging off the front barrel of the lens which moves during focusing/zooming: http://raynox.co.jp/english/dcr/dcr2025pro/index.htm

http://www.bhphotovideo.com/c/product/381969-REG/Canon_0300B001_TC_DC58B_1_5x_Teleconverter_Lens.html#specifications
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Tony82 Junior Member • Posts: 35
Re: Extender/Teleconverter

Don't canon do extenders to fit eos cameras, say something like a 2 x extender will make a 75-300 to a 150-600 not sure if you will retain you autofocus

search ebay or google for canon extenders

http://www.ebay.co.uk/itm/Canon-Extender-EF-2x-II-Teleconverter-/221030605205?pt=UK_Lenses_Filters_Lenses&hash=item3376736195#ht_500wt_1287

did a quick ebay search and found a few, the link above is just 1 hope that is waht your looking for.

Lemming51
Lemming51 Forum Pro • Posts: 15,261
Re: Extender/Teleconverter

Tony82 wrote:

Don't canon do extenders to fit eos cameras, say something like a 2 x extender will make a 75-300 to a 150-600 not sure if you will retain you autofocus

No. Canon's own tele-extenders (EF 1.4x and EF 2x, original, Mk I, II, or III) fit only a select few L series primes (135mm and longer) and L zooms (70-200 f/2.8 and f/4L and 100-400). They have an extended front element that fits into open space at the rear of these lenses. Other lenses don't have that open space at the rear.

Teleconverters by Kenko, Tamron, etc. made for the EF mount cannot be mounted to EF-S lenses like the EF-S 55-250. EF-S lenses have a bit of extension back from the mount that prohibit them being mounted to these converters.

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WilbaW
WilbaW Forum Pro • Posts: 11,619
Re: Extender/Teleconverter

Lemming51 wrote:

Teleconverters by Kenko, Tamron, etc. made for the EF mount cannot be mounted to EF-S lenses like the EF-S 55-250.

A TC and an EF-S lens can be combined by putting an extension tube between them, but that means you can't focus in the distance.

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Narcosynthesis Senior Member • Posts: 1,832
Re: Extender/Teleconverter

There are 1.4x and 2x teleconverters made by Canon (and indeed third parties) but they are not really designed to work on a basic lens like the 55-250mm.

The main problem is that when you add an extender, you effectively narrow your aperture - losing one stop of light on a 1.4x, and 2 stops of light on a 2x converter.

This is fine when you are looking at a fast high end prime like a 300mm f2.8 and a high end body that can focus at slower apertures, but attempting to use it with a more basic model will just test the system too much and you will be left with poor (if at all) AF and a very slow lens.

You do sometimes see cheap add on lenses to go on the front of a lens to get more reach, but in general I would avoid these as poor quality.

Sadly the only option to get more reach is to save up for on of the bigger lenses - check out the third party options from the likes of Tamron and Sigma for a slightly less pricy entry into the super telephoto lenses.
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