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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 19 Mar 2013 (Tuesday) 13:29
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5d mkiii help

 
wilk182
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Mar 19, 2013 13:29 |  #1

hi all,

I have recently acquired a 5d mkiii which I used for the first time at the weekend.

I had been shooting using the kit 24-105mm lens, a uv filter for protection and a Hoya circular polariser and noticed massive fall-off around the corners at 24mm.

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this image was shot at 1/80 sec, f5.6, iso 100.

I know its not a good photo (i'll put an image from this shoot i'm happy with later!), just want to know if something is seriously wrong?

thanks
mick



  
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s2kdriver80
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Mar 19, 2013 13:35 |  #2

There is some fall-off with this lens at 24mm, especially wide open. If those filters have thick bezels, they would contribute to the vignetting even more.


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*Jayrou
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Mar 19, 2013 13:43 as a reply to  @ s2kdriver80's post |  #3

If it were me, Id lose the UV filter, if you insist on filters for protection , the polarizer would do that job too.. no need for both in that circumstance.


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Snowyman
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Mar 19, 2013 13:47 |  #4

A Polarising Filter will do that, darkening blue sky is its primary function for most photographers.

And it is really worth "pushing the boat out" when it comes to filters as inexpensive ones have a tendency to slaughter image quality.


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tgara
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Mar 19, 2013 13:50 as a reply to  @ *Jayrou's post |  #5

You're not stacking the UV and Polarizing filters, are you? Like the above poster, I would do away with the UV filter entirely. It's really not needed for digital photos, and in my view degrades image quality.

As for the 24-105 lens, yes, you will see darker corners at the wide end, especially 24 and they become more pronounced with a polarizer. It's just the physics of the lens.

FYI, the Perhipheral Illumination Correction feature in your camera is designed to brighten up these dark places. However, I believe it only works for JPGs and can override any exposure compensation adjustments you've made. Use this feature with caution (I turn it off, personally).


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DagoImaging
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Mar 19, 2013 13:51 |  #6

My bet it's from the stacked filters...and what others said, no sense in having the UV on if you're putting the polarizer on. Then again, I either use a functional filter or no filter...but that can start a whole other debate.


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wilk182
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Mar 19, 2013 13:52 as a reply to  @ Snowyman's post |  #7

thanks, at least I know there is nothing wrong with the camera/lens

can you recommend a good polariser? the one I use currently cost around £50




  
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tgara
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Mar 19, 2013 13:59 |  #8

wilk182 wrote in post #15732657 (external link)
thanks, at least I know there is nothing wrong with the camera/lens

can you recommend a good polariser? the one I use currently cost around £50

Sure, any of the top brands will do a good job. B+W, Kasemann, and Hoya are the brands most folks are using. You will get good results with any of these. They are not cheap, but quality never is.


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s2kdriver80
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Mar 19, 2013 14:04 |  #9

wilk182 wrote in post #15732657 (external link)
thanks, at least I know there is nothing wrong with the camera/lens

can you recommend a good polariser? the one I use currently cost around £50

http://www.bhphotovide​o.com …mm_XS_Pro_Digit​al_MC.html (external link)

That's what I use for the 24-105mm.


-Paul
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wilk182
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Mar 19, 2013 14:05 |  #10

im currently using Hoya.

many thanks




  
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s2kdriver80
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Mar 19, 2013 14:09 as a reply to  @ s2kdriver80's post |  #11

For protection, I would just use the included hood, it also cuts down on flare. Use the CP filter only if you need polarization, all modern lenses have UV coatings.


-Paul
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jwcdds
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Mar 19, 2013 14:12 |  #12

Use one or the other. As others have noted, your corner vignetting is from stacking filters. Won't be visible if you zoom in a bit. But at the extreme wide end, you will get what you see here on the photos.


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Buylongterm
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Mar 19, 2013 15:57 |  #13

Also where were you focusing? Pic seems very soft? What were your settings?


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Mar 19, 2013 16:15 |  #14

Buylongterm wrote in post #15733088 (external link)
Also where were you focusing? Pic seems very soft? What were your settings?

1/80 sec, f5.6, iso 100.

I blame the filters for everything..:D


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marcosphoto
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Mar 21, 2013 10:06 |  #15

I'd like to offer a totally different possibility in addition to the likelyhood of filters. If the body is new you may have not gone over the settings with a fine tooth comb yet. Look up the lens correction in the settings and make sure that your lens is programmed in and that the lens correction is set to on. I threw on an old lens when I first got my old 5D2 and got crazy vignette instantly. At first I thought the camera was broken until I realized that this old-cheap lens was not prgorammed in the firmware from the factory. Had to add it with canon EOS utility. The 24-105L is definately in there from the get-go but maybe the lens correction is still set to off. Something to look into.




  
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5d mkiii help
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