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DX UWA on FX
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<blockquote data-quote="MartinCornwall" data-source="post: 504820" data-attributes="member: 12701"><p>I just tried the experiment for you @<a href="http://nikonites.com/member-14174-mikew.html" target="_blank">mikew</a> . Sigma 10-20mm DX lens on a D750. They are correct, although I used an old Jessops x2 converter. </p><p></p><p>1st pic, 10mm no converter.</p><p>[ATTACH]185798[/ATTACH]</p><p></p><p></p><p>2nd pic 10mm with 2x converter</p><p></p><p>[ATTACH]185799[/ATTACH]</p><p></p><p>Ignore the subject as it is just a quick test out of a window, but there is clearly no vignetting on the second pic. But it has become 20mm so no longer UWA so I can't see the advantage of this. Although if I had a 1.4 then the 10mm would be 14mm with no vignetting. Even though it has worked it's not for me due to the loss of IQ and slower focusing through the converter.</p></blockquote><p></p>
[QUOTE="MartinCornwall, post: 504820, member: 12701"] I just tried the experiment for you @[URL="http://nikonites.com/member-14174-mikew.html"]mikew[/URL] . Sigma 10-20mm DX lens on a D750. They are correct, although I used an old Jessops x2 converter. 1st pic, 10mm no converter. [ATTACH=CONFIG]185798._xfImport[/ATTACH] 2nd pic 10mm with 2x converter [ATTACH=CONFIG]185799._xfImport[/ATTACH] Ignore the subject as it is just a quick test out of a window, but there is clearly no vignetting on the second pic. But it has become 20mm so no longer UWA so I can't see the advantage of this. Although if I had a 1.4 then the 10mm would be 14mm with no vignetting. Even though it has worked it's not for me due to the loss of IQ and slower focusing through the converter. [/QUOTE]
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