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Teleconverters
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Oct 8, 2021 10:13:35   #
VietVet Loc: Brooklyn, NY
 
I have a canon 100-400L II lens that I use on my EOS R & 7Dii. I purchased a canon 1.4 converter V-III but am finding the images are very soft. (extremely disappointed). I’ve tried upping the shutter speed etc. but still soft focus on all images. The mentioned lens used as is takes perfectly sharp images. Any way to solve this issue?

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Oct 8, 2021 10:17:41   #
rcarol
 
An example of one of your images would help us help you.

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Oct 8, 2021 10:19:35   #
yds0066 Loc: Southwestern Illinois
 
Which version of the converter did you purchase?

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Oct 8, 2021 10:20:20   #
jerryc41 Loc: Catskill Mts of NY
 
I'm surprised at that. You have a good lens and good converter - unless you got a converter with a defect. Let's see if you get useful suggestions. I use a Kenko 1.4, and it's fine.

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Oct 8, 2021 10:23:16   #
VietVet Loc: Brooklyn, NY
 
Sorry forgot. It’s version III

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Oct 8, 2021 10:28:31   #
VietVet Loc: Brooklyn, NY
 
I’m not new to photography and Mostly shoot wildlife and landscape. I’m currently on vacation so can’t post any at this time but I can see the soft focus on the back of the camera. After removing the converter all images taken without it are spot on focus.

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Oct 8, 2021 10:30:39   #
VietVet Loc: Brooklyn, NY
 
I was surprised myself Jerry. Don’t know what could be defective on it. Viewing through the converter looks perfectly fine but something is definitely going on.

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Oct 8, 2021 10:33:06   #
JBRIII
 
Have you tried manual focus, would eliminate optics at least?

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Oct 8, 2021 10:36:23   #
quixdraw Loc: American Free States -- Montana
 
I use a 1.4 on a Nikon 200-500. There is a slight degradation in sharpness visible in major crops, but I'm getting subjects that would otherwise be out of reach. I don't use the on camera monitor much, and don't put a lot of faith in it. How do the photos look on your computer?

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Oct 8, 2021 10:37:01   #
foathog Loc: Greensboro, NC
 
Is the converter clean??

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Oct 8, 2021 10:39:20   #
frankraney Loc: Clovis, Ca. For the last 50 years.
 
VietVet wrote:
I have a canon 100-400L lens that I use on my EOS R & 7Dii. I purchased a canon 1.4 converter but am finding the images are very soft. (extremely disappointed). I’ve tried upping the shutter speed etc. but still soft focus on all images. The mentioned lens used as is takes perfectly sharp images. Any way to solve this issue?


All guesses without samples. Could be several things, but since you are getting good photos with out the converter, it is more than likely the converter. Or movement. Longer lens more chance for movement, but that should show as Morton, not soft focus.

https://lonewolfonline.net/soft-focus/

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Oct 8, 2021 10:41:01   #
jeep_daddy Loc: Prescott AZ
 
VietVet wrote:
I have a canon 100-400L lens that I use on my EOS R & 7Dii. I purchased a canon 1.4 converter but am finding the images are very soft. (extremely disappointed). I’ve tried upping the shutter speed etc. but still soft focus on all images. The mentioned lens used as is takes perfectly sharp images. Any way to solve this issue?


Yes, buy the new Canon 100-400L Mk II lens and you will see a huge improvement on sharpness and focusing speed.

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Oct 8, 2021 10:49:46   #
VietVet Loc: Brooklyn, NY
 
As noted on previous post, I’m currently on vacation and no way to see them on the computer only viewing on the camera screen. But images taken without it are clear and in sharp focus.

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Oct 8, 2021 10:51:48   #
VietVet Loc: Brooklyn, NY
 
It’s spotless.

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Oct 8, 2021 10:53:19   #
VietVet Loc: Brooklyn, NY
 
Yes, it’s spotless and very clear

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