What size polarizer fits a 0.43× wide-angle converter with a 65mm cap?
Asked 11/7/2020
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I’m new to DSLR gear and have a Nikon D7500 with a Xit “0.43× high definition wide angle” converter. The cap says Ø65, so I assumed I might need a 65mm polarizer, but I can’t find that size. Is the cap diameter the same as the filter thread size, and what kind of polarizer or adapter would I need for this setup?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
5y ago
2 Answers
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A cheap 0.43× wide angle converter will not warrant buying a polariser for. The polariser would be more expensive than the converter (and the converter gives a comparatively low quality image).
Additionally, the main use case of a polariser is to remove light of a particular polarisation. However, a wide angle scene more often than not features a flurry of different polarisation grades and directions. You'll get reflections and dispersions removed at different levels throughout the scene; for example, showing a darkened blue of the sky that considerably differs in darkness across the scene.
Originally by user95069. Source · Licensed CC BY-SA 4.0
user95069
5y ago
0
Generated from our catalog & community — verify before relying on it.
The Ø65 on the cap is likely the cap size, not a standard filter thread size. For screw-in filters, you need the lens or converter’s filter thread diameter, usually marked with a “Ø” on the barrel.
Based on the answers, 65mm is not a common filter thread size, so a normal screw-in polarizer for this converter will be hard to find. You could theoretically use a custom adapter, custom-made ring, or a filter-holder system with a custom ring, but that will likely cost more than this budget wide-angle converter is worth.
Also, a polarizer is often a poor match for an ultra-wide setup: skies can darken unevenly across the frame, and the effect may look patchy.
Practical advice: don’t buy a polarizer specifically for this cheap 0.43× converter. If you want to use polarizers regularly, you’ll be better off using a lens with a standard filter thread size or a better-quality wide-angle lens that accepts normal filters.
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