Thread: RED Epic-W Soft Focus Issue

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  1. #1 RED Epic-W Soft Focus Issue 
    Member Randy Kessler's Avatar
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    Hello Everyone,

    I have noticed on my Epic-W while shooting, my video has been hard to focus in on and I am getting soft images, making it hard to get a sharp focus point. I primarily see this issue when using the Canon II EF f/2.8 70-200mm lens. This problem usually persists later on while the camera has been on for a while and filming. When I am filming the start of a football game the focusing is pinpoint accurate. Later on in the game I start having focusing issues (right after halftime) and the image begins to become very soft. (I will post picture link below). Would this be a back focus issue maybe? Any help would be appreciated! Thanks!

    https://www.flickr.com/photos/731723...57689892666485
    Last edited by Randy Kessler; 11-21-2017 at 11:37 AM. Reason: images won't come up
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  2. #2  
    Senior Member Tom Dowler's Avatar
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    Do you also have a shot of what it's like at the beginning of the game, for comparison?

    This, to me, looks like fogging - some kind of condensation on the lens, maybe?

    Are you able to reproduce with the same lens on a different camera? Whatabout another lens on the Epic?
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  3. #3  
    Moderator Phil Holland's Avatar
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    That looks rather uncharacteristic of this lens and camera combo. Are you using any filters? Is it very humid or moist out? Almost looks like condensation build up.

    I only ask as I see halation that's inconsistent which is revealed further if something is out of focus.
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  4. #4  
    Senior Member Jacek Zakowicz's Avatar
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    I would say definitely a problem with your lens. Seems like a major glass misalignment. This is not a back focus/flange depth issue IMO. Maybe the lens is not mounted correctly?
    Maybe you can swap it on a canon body and take a picture? that would explain a lot...
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  5. #5  
    Member Randy Kessler's Avatar
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    Thanks for responding guys. Yeah this really happens in the coldest of weather. The air seems pretty dry but still the cool air can probably bring some condensation into the lens. It seems that the fogging only happens with the 70-200mm lens. I put some new images on that Flick link if you want to check it out. Thanks again for responding.

    https://www.flickr.com/photos/731723...57689892666485
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  6. #6  
    Senior Member Jacek Zakowicz's Avatar
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    Condensation usually sets when the lens is moved from warm to cold . Most of the time in the morning. just look into the lens- easy to see....
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  7. #7  
    Quote Originally Posted by Jacek Zakowicz View Post
    Condensation usually sets when the lens is moved from warm to cold . Most of the time in the morning. just look into the lens- easy to see....
    Did you go inside during halftime? I love a good camera mystery solving!
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  8. #8  
    Member Randy Kessler's Avatar
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    Quote Originally Posted by Christopher S Johnson View Post
    Did you go inside during halftime? I love a good camera mystery solving!
    Christopher, I did not go inside at all. Camera and lens just stayed on the tripod, in the elements.
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  9. #9  
    Senior Member Tom Dowler's Avatar
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    I once dropped a cheaper Canon lens and got halation like this. I think it was from elements being misaligned.


    any chance there was a physical knock to it?
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  10. #10  
    Member Randy Kessler's Avatar
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    Tom,

    This lens has had no damage to it. I've also used my other 70-200mm with the Epic-W and the same thing happens.
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