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Hi,please buy the magnetic 72mm lens cap,please check here
https://www.kentfaith.com/index.php?route=product/search&search=KF04.072
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Hello, thanks for reaching out! Yes, this 77mm K&F Concept lens filter cap is for a 77mm filter and will also fit one side of the step up ring with a 77mm filter size, unfortunately it will not fit the 67mm side of the step-up ring. Best regards
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Lens caps protect the lens. Lens hood does not need protection
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The connection should fit, but the lens hood is wide and flat, built for wide-angle lenses. There is therefore very little shadowing when used on a 58mm Helios lens due to its narrower angle of view. A higher construction would certainly be better. Just search for - lens hood 49mm normal lens.
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You can easily screw the 52mm metal wide-angle sun visor onto the 49mm - 52mm step UP filter adapter. This can even be an advantage if you want to avoid possible shadowing at the edges with smaller focal length settings.
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Yes, there are suitable lens caps with a larger diameter (= inner diameter of the outer opening), which can then be placed on the outside when the aperture is on.