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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 23 Jul 2011 (Saturday) 11:34
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70-200mm f/4L IS with 2x Converter or 100-400mm f/4.5-5.6L IS

 
dp19
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Jul 23, 2011 11:34 |  #1

Hi All

Looking for some advice

Will I get the same sharpness/quality using a 70-200mm with 2x converter than if i use a 100-400mm?

It will mainly be used for aviation photography (both static and air shots) with other bits here and there

I think the 70-200mm will be a better all rounder?

Thanks in advance for any feedback


Dean
Canon 5d II | Canon 550D | 50mm F/1.8 II |55-250mm F/4-5.6 | 24-105mm F/4L | 100-400mm F/4.5-5.6L
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crn3371
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Jul 23, 2011 12:07 |  #2

The 100-400 will be sharper. Plus, unless you're using a 1 series body, you'll loose AF by putting a 2x tcon on an f4 lens.




  
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dp19
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Jul 23, 2011 12:16 as a reply to  @ crn3371's post |  #3

Will AF still work with the 1.4x tcon?

Also, Is "IS" a must when having it fully extended? Or could I can away with the non-IS version


Dean
Canon 5d II | Canon 550D | 50mm F/1.8 II |55-250mm F/4-5.6 | 24-105mm F/4L | 100-400mm F/4.5-5.6L
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JeffreyG
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Jul 23, 2011 12:22 |  #4

AF is retained with the 1.4X TC as you will be 98-280/5.6. The 2X TC gives a 140-400/8 with no AF.

IS is very strongly preferred for airshows because you will want to be shooting propellor driven aircraft at shutter speeds of 1/200 and slower, which is hard to handhold well at focal lengths of 300mm or more.


My personal stuff:http://www.flickr.com/​photos/jngirbach/sets/ (external link)
I use a Canon 5DIII and a Sony A7rIII

  
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crn3371
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Jul 23, 2011 12:23 |  #5

1 series bodies can AF at f8. All the others f5.6. You loose 1 stop of light with a 1.4 tcon, 2 stops with a 2x. So, yes you will retain AF. The longer the lens, the more advantageous it is to have IS, or some form of support.




  
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wombatHorror
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Jul 24, 2011 02:07 |  #6

dp19 wrote in post #12809378 (external link)
Hi All

Looking for some advice

Will I get the same sharpness/quality using a 70-200mm with 2x converter than if i use a 100-400mm?

It will mainly be used for aviation photography (both static and air shots) with other bits here and there

I think the 70-200mm will be a better all rounder?

Thanks in advance for any feedback

never used the 100-400L bet I'm pretty sure that would do better, plus it is f/5.6 instead of an awful f/8! so 100-400L by mile.

f/4 IS + 2x TC III isn't all that great, only brings in slightly more detail than upsizing with a 1.4x TC on it and that at least has AF




  
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ukcyberboy
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Jul 24, 2011 04:01 |  #7

DP what camera body are you using and do yu have either lens.
As for IS,it all depends on the shutter speed I suppose, if you shooting fast, maybe not.
Check my sig out and I enjoy it, I haven't shot in anger yet though.
But try them all out see which you like.


Body | Canon 6D |
Lens | Yongnuo 50mm 1.8 |
Lens | Canon 28-70 2.8 L |
Lens | Canon 70-200is F4 L |
Lighting | Yongnuo YN600RX |
Accessories | Various Bits |‚Äč

  
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70-200mm f/4L IS with 2x Converter or 100-400mm f/4.5-5.6L IS
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