dogbert Posted January 18, 2009 Share Posted January 18, 2009 <p>More of an observation than a question. This weekend I was out shooting with my 24-105 f4 L and my new (second hand) 5D. One of the things I discovered was that the 24-105 L vignettes with a Hoya multicoated polariser at 24 mm. When I say vignettes I do not mean just the usual light fall-off that occurs when shooting at wide apertures with this lens, but rather the extreme corners of the frame were slightly obscured by the filter. I was not stacking filters in case you were wondering.<br> This came as a complete surprise as I have not heard anything about needing thin filters for the 24-105 f4L and 24 mm is not particularly wide. The Hoya polariser, while not that thin is not that thick either. Further my EF-S 10-22 does not vignette with this filter.<br> I have previously shot 35 mm film with this combo, but the slide mounts probably concealed the vignetting.<br> Has anyone else noticed this?</p> Link to comment Share on other sites More sharing options...
sattler123 Posted January 18, 2009 Share Posted January 18, 2009 <p>24mm is plenty wide on a FF body and yes, you should use a thin polarizer.</p> Link to comment Share on other sites More sharing options...
maddox Posted January 18, 2009 Share Posted January 18, 2009 <p>Geoff,<br> You might want to consider getting a Nikon polarizer for this lens. On the Nikon polarizers, the actual optical glass rings are of a larger diameter than the thread ring, helping to minimize vignetting effects at wide angle. There may also be some other manufacturers who make polarizers this way.<br> As for the filter not vignetting on the 10-22, I would assume this is simply a consequence of the EF-S format. The "reduced" sensor size of your other camera probably just "cropped out" the vignetting.<br> -Michael</p> Link to comment Share on other sites More sharing options...
zml Posted January 18, 2009 Share Posted January 18, 2009 <p>Even slim polarizers vignette at 24 mm on a full frame rig with the lens in question: 24-105/4 L IS at 24 mm, f/9 with Heliopan slim polarizer SH-PMC on 1Ds3. Don't pay attention to the effects of uneven polarization, but only to the mechanical vignetting part. No processing other than resizing, no lens peripheral illumination correction applied. EXIF intact for your amusement.<br> <img src="http://d6d2h4gfvy8t8.cloudfront.net/8515023-lg.jpg" alt="" width="660" height="440" /></p> Link to comment Share on other sites More sharing options...
dogbert Posted January 18, 2009 Author Share Posted January 18, 2009 <p>Wow! How did Canon manage to produce an L lens which can't take even a slim polariser without vignetting? I guess even a UV filter, which Canon recommends for weather sealing purposes, will vignette.</p> Link to comment Share on other sites More sharing options...
martin-s Posted January 18, 2009 Share Posted January 18, 2009 <p>While I don't own the 24–105, I would certainly recommend a slim-line polariser for anything approaching 24mm and wider. I use B+W slim-line polarisers on both my 17–40mm and TS-E 24mm without any problems.</p> Link to comment Share on other sites More sharing options...
david_henderson Posted January 18, 2009 Share Posted January 18, 2009 <p><em>"24 mm is not particularly wide"</em><br> <em></em><br> With a full frame camera, that's a misconception. </p> Link to comment Share on other sites More sharing options...
mendel_leisk Posted January 18, 2009 Share Posted January 18, 2009 <p>Canon's 24mm's can vary: I have both the 24-70 and the 24-105, and the '105 is noticeably wider at the 24 end. I've used a slim B+W Circular Polarizer with both. With the '70 I was able to stack the CP on top of a regular UV filter without vignette. Repeating with the '105 I had definite vignette. Using the slim B+W CP alone I had no vignette on the 24-105.</p> Link to comment Share on other sites More sharing options...
ronhartman Posted January 18, 2009 Share Posted January 18, 2009 <p>I just sold my 24-105L, but I don't recall any vignetting on my 5D with a Sunpak polarizing filter. The Sunpak is a bit on the slim side, but still has threads for the lens cap. I did notice quite a bit of light falloff in the very corners at 24mm, f/4, even with no filter. I'm using the same filter on a Tamron 20-40mm with no problem.</p> Link to comment Share on other sites More sharing options...
zml Posted January 18, 2009 Share Posted January 18, 2009 <p>Geoff - a slim UV filter (I use Heliopan SH-PMC when absolutely necessary, like during epic sandstorms and biblical deluges) is a bit "slimmer" than even the "slimmest" polarizer (1 ring vs. 2, 1 glass layer vs.2) so vignetting is not as obvious as with a polarizer. Also, as it has already been said in this thread, the 24-105/4 tends to vignette on a FF camera up to 28-30mm filter or not.</p> Link to comment Share on other sites More sharing options...
bill_morrow1 Posted January 18, 2009 Share Posted January 18, 2009 <p>Since on the subject of polarizers--not necessarily vignetting though. I have a Canon,<br> which does NOT allow for the placement of a lens cap thereon between shots. Oh yes<br> a rubber slip-over works, but the original Canon cap has nothing for the cap catches<br> to grab onto. I'm sure the reason for this has some sound basis, it's just that I can't<br> figure out what it is. Any thoughts are appreciated.</p> Link to comment Share on other sites More sharing options...
Ian Taylor Posted January 18, 2009 Share Posted January 18, 2009 <p>I've had two friends complain about this problem with this lens.</p> Link to comment Share on other sites More sharing options...
zml Posted January 18, 2009 Share Posted January 18, 2009 <p> <em>I have a Canon, which does NOT allow for the placement of a lens cap thereon between shots. </em><br> <em></em><br> Lens caps are overrated... Besides what's wrong with a tupperware or mayo jar cap..? :-) Seriously, use a generic, shallow (so it won't scratch the filter) center-pinch lens cap. The type of lens caps that Canon uses doesn't fit well on many a filter, slim or not.</p> Link to comment Share on other sites More sharing options...
david_henderson Posted January 18, 2009 Share Posted January 18, 2009 <p>The Canon lens cap fits just fine on the Hoya Pro 1 slim polariser.</p> Link to comment Share on other sites More sharing options...
anthony_zipple Posted January 18, 2009 Share Posted January 18, 2009 <p>Slim polarzer is strongly suggested. We are spoiled by all the new wide angle zooms into thinking that 24mm is not "that wide." It is actually quite wide on a FF body and a very wide lens needs to be used with care. I get good results with a slim filter.</p> Link to comment Share on other sites More sharing options...
dogbert Posted January 18, 2009 Author Share Posted January 18, 2009 <p>Thanks for your responses. I also have a Hoya Digital Pro 1 polariser which is quite a bit slimmer and was using this on my EF-S 10-22. I guess I will have to swap them over. Agreed 24 mm is wide, but is is not as wide as 10 mm on a crop camera, and it still seems strange to me using a slim filter on the 24-105 f4L when I can get away with a regular filter on the EF-S 10-22.<br> Anyway live and learn. At least I know I am not the only one to have noticed this.</p> Link to comment Share on other sites More sharing options...
PuppyDigs Posted January 19, 2009 Share Posted January 19, 2009 <blockquote><p>Wow! How did Canon manage to produce an L lens which can't take even a slim polariser without vignetting? I guess even a UV filter, which Canon recommends for weather sealing purposes, will vignette.</p></blockquote><p>Do you own this lens and tried a filter? I actually own the 24-105 4L and use a Hoya HMC Super UV filter and it does not vignette on my 5D at 24mm F4, or any other aperture/focal length. I have a Hoya HMC Polarizer and it it does not vignette either. Both are the standard thickness filters. However, on a lazy day I tried stacking them and indeed they do vignette at 24mm F4--no surprise. Zoom to 35mm and all is well.</p> Sometimes the light’s all shining on me. Other times I can barely see. - Robert Hunter Link to comment Share on other sites More sharing options...
dogbert Posted January 19, 2009 Author Share Posted January 19, 2009 <blockquote> <p>"Do you own this lens and tried a filter? I actually own the 24-105 4L and use a Hoya HMC Super UV filter and it does not vignette on my 5D at 24mm F4, or any other aperture/focal length. I have a Hoya HMC Polarizer and it it does not vignette either. Both are the standard thickness filters. However, on a lazy day I tried stacking them and indeed they do vignette at 24mm F4--no surprise. Zoom to 35mm and all is well."</p> </blockquote> <p>Yes I do own it. I was so surprised I even did some shooting of blank walls to test. Haven't noticed it vignetting with a Hoya HMC UV, but I was surprised by Michael Liczbanski's results with a Heliopan slim. Presumably a thicker UV filter like a Tiffen might cause problems @ 24mm. <br> My vignetting problems actually started with a Hoya HMC polarizer @ 24 mm focal length, so you may want to check your corners Puppy. F8-11 will be worse than f4.<br> And as others attest, it deosn't seem to be just me that has noticed this.</p> Link to comment Share on other sites More sharing options...
manuel barrera houston, Posted January 19, 2009 Share Posted January 19, 2009 <p>Need a thin filter with the 24-105, a nice lens but distortion and light fall off at the corners. I have that lens and the 24-70 L. For serious stuff the 24-70L is much better, really serious a prime is best.</p> Link to comment Share on other sites More sharing options...
pjmeade Posted January 19, 2009 Share Posted January 19, 2009 <p>As an experiment, I stacked some (3) ND filters and a CP filter on to my 5D+24-105, and got some lovely vignetting. <br /><br /><a title="Weir by Peter Meade, on Flickr" href=" src="http://farm4.static.flickr.com/3361/3204448224_740c2f5c64.jpg" alt="Weir" width="500" height="333" /></a></p> Link to comment Share on other sites More sharing options...
bill_morrow1 Posted January 19, 2009 Share Posted January 19, 2009 <p>Thanks David, I did buy a Hoya 1 later and it does work quite well. The mayo cap worked too, but getting that stuff off the lens...well.....</p> Link to comment Share on other sites More sharing options...
liuap Posted January 19, 2009 Share Posted January 19, 2009 <p>An alternative to aovid the problem is to use a sighltly larger polarizer with a up-ring adapter, for example, 82mm. That works well with my lenses.</p> Link to comment Share on other sites More sharing options...
delwyn_ching Posted January 19, 2009 Share Posted January 19, 2009 <p>Mine does the same even with a Hoya thin filter. I just up the f/stop a bit and that takes care of it. I have the 24-105L on a 5D. At night, I use a flash and if not, just have to crop the vignetting portion out with Photoshop.</p> Link to comment Share on other sites More sharing options...
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