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Occasional Contributor
Posts: 9
Registered: ‎01-28-2019

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

Hi,

 

I have a Canon EOS 80D + EF70-200 F4L IS USM and want to upgrade with a Canon Extender EF 2x III.

 

What do you think? This a good and working gear or just buy a Canon Extender EF 1,4x?

 

Thank you for your answer.

Honored Contributor
Posts: 7,963
Registered: ‎08-13-2015

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender


@gabormatesz wrote:

Hi,

 

I have a Canon EOS 80D + EF70-200 F4L IS USM and want to upgrade with a Canon Extender EF 2x III.

 

What do you think? This a good and working gear or just buy a Canon Extender EF 1,4x?

 

Thank you for your answer.


Are you aware of the performance trade offs involved with using a teleconverter?  If so, then go for it.  The Canon extenders with Canon lenses are a much better choice than third party extenders.  

 

Using it will cause the cameras to not to focus quite as quickly, as the camera body will be receiving far less light when you use the EF 2x.  You will also experience a reduction int he number of available AF points, a maximum of 27.

I have considered the EF 2x, but settled for the EF 1.4x so that I can use it with more lenses.  For the most part, you can only use the EF 2x with lenses with apertures that are f/4, or faster.  I use my EF 1.4x with a 100-400mm.  

 

The performance hits that you experience are far less severe with the EF 1.4x compared to the EF 2x.  

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Occasional Contributor
Posts: 9
Registered: ‎01-28-2019

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

I'm not sure I know these disadvantages. I know that f4 will be f8 with 2x teleconverter. Anything else?

 

I think the autofocus will not be affected when I use the 2x converter.

 

Hopefully, the 80D knowledge is enough for this gear upgrade, right?

 

Thank you!

Reputable Contributor
Posts: 766
Registered: ‎06-11-2013

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

[ Edited ]

In addition to loss of light (two stop with a 2X teleconverter), which effects autofocus, there is also some loss of image quality. The teleconverter effectively magnifies any shortcomings of the lens. A 2X teleconverter will cause more loss of image quality than a weaker 1.4X... but there's some effect from that too.

 

How much loss of image quality is hard to predict. There are just too many different possible combinations, plus some variation from one copy of any particular lens to the next. Maybe you can find someone with the exact combo you're considering. But even then, what they find acceptable in the way of image quality loss, you may not.

 

If yours is the non-IS 70-200mm, it will also make it harder to get a steady shot. Without image stabilization, about the minimum shutter speed you'll want to try to hand hold with 200mm + 2X would be 1/640. So you'll need pretty good light conditions to work with the combo.... or higher ISOs. If yours is the IS version of that lens, it will be better... but you'll still need to use faster shutter speed than you did when using the lens without any teleconverter.

 

Yes, your autofocus willl be effected, even with the 80D. The good news is that the 80D is "f/8 capable". At least some of it's autofocus points will be able to work with an effective f/8 lens/teleconverter combo. I don't know how many other than to say that it won't be the entire 45-point array. I know that up to 27 points can work on that camera when it's used with 100-400mm Mark II and 1.4X III teleconverter combo, specifically... but it's different with other lens/teleconverter combos. Plus with a teleconverter installed, the AF will tend to be slower, hunt and struggle more. How much depends on a lot of things, such as the lighting conditions when you're trying to shoot and subject detail/contrast. f/8 effective aperture delivers 4X less light than f/4, so the AF sensor array will have far less to work with. Your viewfinder also will be dimmed down quite a bit.

 

What it all comes down to is that basically there's "no free lunch"... There's simply no cheap and easy way to get "more telephoto focal length". There's always going to be some compromise trying to do it with a teleconverter. And without a doubt, a Canon EF 100-400mm Mark II or EF 400mm f/5.6L USM lens without any teleconverter would work better and give better results than a 70-200mm with a 2X teleconverter. Of course, those options are more expensive than just adding a teleconverter to your current lens.

 

***********

 

Alan Myers
San Jose, Calif., USA
"Walk softly and carry a big lens."
GEAR: 5DII, 7DII (x2), 7D(x2) some other cameras, various lenses & accessories
FLICKR & ZENFOLIO 

VIP
Posts: 10,993
Registered: ‎12-07-2012

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

"I have a Canon EOS 80D + EF70-200 F4L IS USM and want to upgrade with a Canon Extender EF 2x III."

 

Don't do it. It is a bad idea. It is in no way an "upgrade"!

EOS 1DX and 1D Mk IV, even less and less other stuff.
VIP
Posts: 10,993
Registered: ‎12-07-2012

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

" EF 400mm f/5.6L USM lens"

 

+1 Smiley Wink

EOS 1DX and 1D Mk IV, even less and less other stuff.
Occasional Contributor
Posts: 9
Registered: ‎01-28-2019

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

Oh, I understand, so I got a complete view of the advantages and disadvantages of the extender.

 

Thank you very much! The loss of image quality does not really like. But who would like it, right?!

Occasional Contributor
Posts: 9
Registered: ‎01-28-2019

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

I was thinking about this too, the EF400 f/5,6L USM was perfect for me and my wildlife andvertures. Smiley Happy

 

Thank you for your confirm.

VIP
Posts: 10,993
Registered: ‎12-07-2012

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

"I got a complete view of the advantages and disadvantages of the extender."

 

There is no advantage. Smiley Frustrated

EOS 1DX and 1D Mk IV, even less and less other stuff.
Honored Contributor
Posts: 7,963
Registered: ‎08-13-2015

Re: Canon Lens EF 70-200mm L F4 USM+ 2X L series extender

The EF 400mm f/5.6L USM lens is a great lens. I use my 100-400 a lot, but I do so handheld most of the time. But, if I were using the 400mm prime I would want to use it on tripod, due to its’ long FL.

Using a super telephoto lens has learning curve. You have to get used to viewing the world through a straw. The longer the straw, the harder it is to get your bearings. This is one advantage of a zoom. You can back to reacquire a subject, and back in again.

I like the advice to pass on an extender. If you plan to use the extended FL most all of the time, then you are better off with a lens with the native FL.
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