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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings


@USCRx wrote:

For your information, here was the shot that precipitated me not using the extender anymore: pronghorn, sitting still, 500mm + 1.4x extender, f/5.6, ISO 500, 1/3200 sec, on tripod, IS on. I must've tried ~ 20 shots of this pronghorn, trying to get a sharp image, and they were all like this one.

 


I am sure the extender did its' part.  This looks to have front focused by quite a bit.    You can check where your focus point was in Canon's DPP.  That may have been more tele and less the lens.  But, that looks a little too far to be front focusing caused the lens or tele.

 

I think I would keep OS turn off with this lens on a tripod.

 

I had a Sigma 150-500 that hadreally bad OS.  If I held the lens steady, suddenly you would hear a clunk in the lens, and you lost your subject.  Even worse on a tripod.  The lens was not bad just as long as you didn't use Sigma OS.  They seemed to have fixed the OS stability problem with Sigma 150-600 lenses.

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"Doctor told me to get out and walk, so I bought a Canon."
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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

I am sure that is OOF and too far. Your settings are fine. Hard you tried a much closer subject
EOS 1DX and 1D Mk IV and several lenses!
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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Try this, get a doll or Coke can or some suitable subject at much closer. Say 25 feet. Both on and off tripod. IS on and off. Change camera settings as this is how you learn the lens.
EOS 1DX and 1D Mk IV and several lenses!
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Registered: ‎01-25-2018

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

How does that 1.4X do with another lens?  Converters hurt the IQ but it shouldn't hurt it badly enough to make a photograph unusable.

 

The following three are from shortly after I bought an EF 800 f5.6; the first is the bare lens, the second is with a 1.4X, and the third is a test shot with the 2X which requires manual focusing even on the 1 series since it results in a f11 lens.  Image quality definitely drops with extenders but under the right circumstances they can still be a good choice.  Contrast and sharpness fall off compared to the bare lens but it still should produce far better results than what you got so something is not working out.

 

And as Ernie noted, your photos will improve a lot after you get some time with the lens.  I have shot with 300 and 400 lenses for some time but the 800 required a lot of learning.

 

Rodger

 

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EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

"I must've tried ~ 20 shots of this pronghorn, trying to get a sharp image..."

 

Here is another tip.  There is a lot of controversy whether it is better to use a tel-con or just crop to that same ratio in post.  You may find the lens with no converter and cropping later is better IQ. I am a never use a tel-con person. I don't like them, never did. I bet I have six or seven setting on my shelf downstairs.

 

At any rate you must post edit.   You must do lens correction. You must shoot Raw.  And, you must get closer. Do the test! Smiley Happy

EOS 1DX and 1D Mk IV and several lenses!
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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

"I had a Sigma 150-500 that hadreally bad OS."

 

I had three of those.  I have one as we speak.  It is a fantastic lens and as sharp as any of the super zooms. Plus it is a bit lighter.  The first two have a very long story involving them but to make that story short, this replacement, 3rd try, is a winner.

At the time I was shooting hummingbirds a lot of the time. It was physically impossible to keep a bird in the frame with the OS turned on.

I will say if you find a good one used, they are a great buy because you can get one cheap. However, two out of three, Smiley Sad I would certainly try it  out very carefully before you lay your money down.

 

(The last one came directly from Sigma if that matters?)

EOS 1DX and 1D Mk IV and several lenses!
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Posts: 14
Registered: ‎06-27-2020

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Took a close look at my Canon Extender 1.4x II today, and discovered that it had smudges on both ends of the lens. I cleaned it, and put it on the setup again (Canon Eos 7D Mark II + EF 500mm f/4 L IS USM), and then took it out to take a few photos. Here's an example of the sharpness TODAY with the gear (a couple of rock wrens). A tremendous improvement, I think. Thanks again!

 

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Registered: ‎01-25-2018

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Much better!  You basically did cataract surgery on your extender Smiley Happy

 

Rodger

EOS 1DX M3, 1DX M2, 1DX, 5DS R, 1D M2, EOS 650 (film), many lenses, XF400 video
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Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Hallelujah Smiley Happy

EOS 1DX and 1D Mk IV and several lenses!
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Registered: ‎06-27-2020

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Hopefully, that was a large part of the issue. Like you mentioned, tho, it really pays to get to know your lens. The settings on that photo were: tripod w/ gimble head, Canon EOS 7D Mark II, 500mm EF L IS USM lens, Extender 1.4x II, ISO 1000, f/5.6, 1/1600 sec., cropped by about 1/3.
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