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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 22 Nov 2009 (Sunday) 20:15
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2x Teleconverter - How soft/bad is it really?

 
TeamSpeed
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Nov 23, 2009 06:18 |  #16

ConDigital wrote in post #9065291 (external link)
I was thinking of using it with my 100-400 but after your comment affirmed what others have told me, that kills that.

What about with a 70-200 2.8?

A 2x on the 100-400 can be perfectly fine. In fact one of my pics doing that made it into the POTN coffebook.

Don't let people sway you off this decision that quickly.

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Stacked 1.4x and 2x on the 100-400...

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SCOTTinNJ
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Nov 23, 2009 06:42 |  #17

You can get acceptable results with a 70-200 and 2x if you have light.

400mm, f/5.6, ISO 100, 1/640

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Lester ­ Wareham
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Nov 23, 2009 06:48 |  #18

Works well with sharp primes, in my case 200/2.8L and 300/4L IS (latter MF only).

I define well as being better than upsizing a shot with a 1.4X.

However that conclusion was tested with a 20D, I must see if the higher pixel density on the 7D invalidates this.

Main problems are more AF slows down, non-pro bodies revert to MF on f4 and below lenses.


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Bear ­ Dale
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Nov 23, 2009 06:49 |  #19

Really appreciate the replies everyone.


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Bear Dale

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gp070575
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Nov 23, 2009 10:21 |  #20

Use it on a very sharp lens and the lost in IQ can be limited.

I used it on real life tests with a 70-200 f2.8 IS and results were disappointing.
Loss in IQ, sharpness, light.
Need more PS the get some good pics but can save you a shot.

Currently testing on a 70-200 f4 IS and results are much better and improving by shutting down a stop more.

I'm planning to use it occasionaly on a 135mm f2 which is very sharp wide open and I'll check the results.


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Mr. ­ Clean
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Nov 23, 2009 10:23 |  #21

Depends on the lens! zooms + 2X TC = not so good, primes + 2X TC = not that bad!


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newworld666
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Nov 23, 2009 10:56 |  #22

I am thinking that I have read somewhere that canon's teleconverters where not designed for zooms but only for primes... I had a quick look on canon's documentation and it seems they don't refer to any zooms for TCs.

Maybe that's why you don't get any good results with zooms :rolleyes:...

As I almost never use zooms, I am not really concerned with bad quality of TCs on this point.
Basically I only use 24L1.4, 135L2.0 and 300L2.8 and with 300L2.8 I am very pleased with the results. Particularly, if I imagine how much the walking to do on almost F1 GP circuits, I am happy not to carry a 400, 500 or 600mm lens . :lol:


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Mr. ­ Clean
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Nov 23, 2009 11:13 |  #23

Straight from Canon's website, the 70-200 2.8L page.
"One of the finest telephoto zoom lenses in the EF line, comparable to a single focal length lens. It has four UD-glass elements to correct chromatic aberrations. Its constant f/2.8 maximum aperture and superb image quality make it one of the most popular professional SLR lenses in the world. Compatible with Extender EF 1.4x II and 2x II."
So....


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newworld666
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Nov 23, 2009 11:30 |  #24

:oops: .. I was not sure at all ..


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marivil
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Nov 23, 2009 17:01 |  #25

TeamSpeed wrote in post #9066145 (external link)
A 2x on the 100-400 can be perfectly fine. In fact one of my pics doing that made it into the POTN coffebook.

Don't let people sway you off this decision that quickly.

QUOTED IMAGE

Stacked 1.4x and 2x on the 100-400...

QUOTED IMAGE

HUM.... makes me want to go and play with the 100-400 and 2X teleconvertor!


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Bear ­ Dale
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Nov 24, 2009 00:02 |  #26

Those photos are fantastic. Thanks for putting them up.


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Neilyb
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Nov 24, 2009 02:44 |  #27

300 2.8 + 2xTC = AMAZING 600mm lens....but on a zoom lens I have never seen impressive shots with a 2xTC. I actually think the 2xTC of today is based on the original 300 2.8 TC (when lenses had individual TCs) because is belies belief, even wide open.

I have decent results with the 100-400 and 1.4TC.


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Tapeman
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Nov 24, 2009 07:29 |  #28

Before I got my 300, I used both converters on my 70-200 2.8L IS a lot. It is a compromise of reach for IQ but very often you can get good results. Since getting the 300 I have not used the converters much on the zoom. The 300 pairs very well with converters.


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Cyclop
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Nov 24, 2009 07:33 |  #29

I recently purchased a Canon 1.4xII Extender to use with my 70-200 f/2.8 L IS lens to provide some additional reach when needed. Nice combination.


Canon 50D w/grip, Canon 7D, Mark II w/grip, Tokina UWA 11-16 2.8, Canon 17-55 2.8 IS, Canon 70-200 2.8 L IS, Canon 300 4 L IS, Canon 400 5.6 L, Canon 100 "macro" 2.8, Canon 60 "macro" 2.8, Canon Extender 1.4xII, Gitzo 3531S tripod w/Markins M20 ballhead, Gitzo GT2531EX tripod, Bogen-Manfrotto 681B monopod w/3232 head.

  
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Bear ­ Dale
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Nov 24, 2009 14:44 |  #30

Tapeman wrote in post #9072384 (external link)
Before I got my 300, I used both converters on my 70-200 2.8L IS a lot.

How'd you find the 2x compared to the 1.4x with the 70-200 2.8L ?


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Bear Dale

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2x Teleconverter - How soft/bad is it really?
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