Filters will use none, some, or all of these features which include:. The frame is the outside ring that the filter sits in and allows you to screw it onto your lens. Frames are usually made from Brass or Aluminum. In our experience we find there is no particular advantage or disadvantage to either and both are a good material for the frame.
Most filter frames come in 2 pieces; the base frame that the glass filter is dropped into and then a retaining ring that clips or screws in to hold the filter in place. This is the way most filters are assembled and is usually not a problem unless the retaining ring loosens or spins out completely.
For this reason Hoya also uses a process called Press Fit. A Press Fit filter frame is a single piece of aluminum brass is to hard of metal to do this that is expanded in a special press just enough to drop in the glass filter then released to create a solid single connection around the entire filter. This ensures the filter will stay in place and more importantly remains completely parallel to the camera's sensor plane when installed correctly onto the lens.
The thickness of the frame matters if you are using extreme wide-angle lenses 20mm or wider on a full-frame camera. Thin mount frames prevent the lens from seeing the actual filter frame in the image, also call vignetting. Shop our range of lens filters here. Share this story Facebook Twitter Copy link. In the market for a UV filter?
Words and Photography by Urth HQ. What is a UV filter used for? There are two main reasons to use a UV Filter: 1. Sharpen your photos and videos by cutting out haze, and 2. Protect your lens from dust, micro scratches and the perils of daily use. Before using a UV filter. After using a UV filter.
How do I choose the best UV filter for my lens? Urth standard range. How does a UV filter work? A UV filter will also keep the rain from the front of the lens, or salty sea spray, or mud kicked up from a dirt racetrack…you get the picture.
UV Filters are also relatively inexpensive. The more pieces a lens has, the more prone it is to lens flares—though whether or not one more piece really makes a difference is still debatable. Those who opt to use UV filters argue they can always take them off if they notice flaring. But additional ghosting on the image has actually been demonstrated on shots taken with and without the filter. While many of them include threading, making it possible to stack filters, this can create a vignetting, especially at wide angles.
That just adds one more step to remove the UV filter in order to use a different one. A lens hood also offers a bit of protection, which may make a UV filter unnecessary. Whether or not you use a UV filter is a personal choice, however, there are a few types of photography where the protection of the UV filter comes in handy. The best UV filters will be a bit thicker, and have additional coatings to prevent ghosting.
Cheap filters without enough clearance can actually ruin lenses that have a slight curve by getting too close and scratching the lens. But, the filter can make shooting a bit easier by preventing scratches to the front of the lens, as well as making clean-up easier.
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