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XUME Magnetic Filter Mounts
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<blockquote data-quote="BackdoorArts" data-source="post: 377738" data-attributes="member: 9240"><p>I received my rings last night, a pair of 77mm rings. I mounted them on both the 16-35mm f4 and the 24-120mm f4. Both lenses have a 4mm deep UV filter on them, about the same depth as my ND400 filter, and about the same depth as the combined XUME rings. So, with the rings and filter the filter edge is ~8mm from the end of the lens. On both lenses at minimum zoom there is vignetting.</p><p></p><p>I took a series of photos as follows...</p><p></p><p>1. As normal with UV filter in place</p><p>2. No filter</p><p>3. XUME Lens mounted ring only</p><p>4. Both XUME rings together, no filter</p><p>5. XUME rings with UV filter at minimum zoom range (i.e. 16mm & 24mm)</p><p>6. XUME rings with UV filter at minimum zoom range with no vignetting</p><p></p><p>Instead of posting a ton of photos I will simply post shots 5 & 6 for each since the rest show no signs of vignetting.</p><p><em><strong></strong></em></p><p><em><strong>16-35mm at 16mm</strong></em></p><p>[ATTACH]123260[/ATTACH]</p><p>(pardon the tile on the edge)</p><p><em><strong></strong></em></p><p><em><strong>16-35mm at 24mm</strong></em></p><p><strong><em>[ATTACH]123261[/ATTACH]</em></strong></p><p></p><p></p><p><strong><em>24-120mm at 24mm</em></strong></p><p><strong><em>[ATTACH]123262[/ATTACH]</em></strong></p><p></p><p></p><p><em><strong>24-120mm at 38mm</strong></em></p><p><strong><em>[ATTACH]123263[/ATTACH]</em></strong></p><p><strong><em></em></strong></p><p><strong><em></em></strong></p><p><strong><em></em></strong>The vignetting is much more severe than I'd expected on both lenses. I suspect that with a thinner filter it would be less obtrusive, but as is I'm thinking it's a show stopper. I could probably use it at 20mm on the 16-35 and fix the dark areas in post, but anything wider than that will lose corner detail.</p><p></p><p>A bit of a shame. I need to take a look at some of the ND shots I've done in the past and see how many are in the 16-20mm range. Losing 24mm to ~35mm on the 24-120mm isn't as big a deal since I have that on the wide angle, but still a PITA if I only have one lens with me. Going to mull this over and maybe do some more testing. I have to think that there's a way they could have gone less deep and made it work, but probably not while retaining the ability to use the lens hood.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 377738, member: 9240"] I received my rings last night, a pair of 77mm rings. I mounted them on both the 16-35mm f4 and the 24-120mm f4. Both lenses have a 4mm deep UV filter on them, about the same depth as my ND400 filter, and about the same depth as the combined XUME rings. So, with the rings and filter the filter edge is ~8mm from the end of the lens. On both lenses at minimum zoom there is vignetting. I took a series of photos as follows... 1. As normal with UV filter in place 2. No filter 3. XUME Lens mounted ring only 4. Both XUME rings together, no filter 5. XUME rings with UV filter at minimum zoom range (i.e. 16mm & 24mm) 6. XUME rings with UV filter at minimum zoom range with no vignetting Instead of posting a ton of photos I will simply post shots 5 & 6 for each since the rest show no signs of vignetting. [I][B] 16-35mm at 16mm[/B][/I] [ATTACH=CONFIG]123260._xfImport[/ATTACH] (pardon the tile on the edge) [I][B] 16-35mm at 24mm[/B][/I] [B][I][ATTACH=CONFIG]123261._xfImport[/ATTACH][/I][/B] [B][I]24-120mm at 24mm [ATTACH=CONFIG]123262._xfImport[/ATTACH][/I][/B] [I][B]24-120mm at 38mm[/B][/I] [B][I][ATTACH=CONFIG]123263._xfImport[/ATTACH] [/I][/B]The vignetting is much more severe than I'd expected on both lenses. I suspect that with a thinner filter it would be less obtrusive, but as is I'm thinking it's a show stopper. I could probably use it at 20mm on the 16-35 and fix the dark areas in post, but anything wider than that will lose corner detail. A bit of a shame. I need to take a look at some of the ND shots I've done in the past and see how many are in the 16-20mm range. Losing 24mm to ~35mm on the 24-120mm isn't as big a deal since I have that on the wide angle, but still a PITA if I only have one lens with me. Going to mull this over and maybe do some more testing. I have to think that there's a way they could have gone less deep and made it work, but probably not while retaining the ability to use the lens hood. [/QUOTE]
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