Sigma 77mm WR Ceramic Protector Filter

Sigma 77mm WR Ceramic Protector Filter

Sigma 77mm WR Ceramic Protector Filter

B&H # SICGC77 MFR # AFG9E0
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Product Highlights

  • Clear Protection Filter
  • Prevents Damage to Lens
  • 1x Filter Factor, +0 Stop
  • 99.76% Transmittance
  • No Effect on Image
  • Clear Glass Ceramic Construction
  • Scratch- and Shock-Resistant
  • Water-Repellent Coating
  • 77mm Front Threads
  • Durable Acrylic Filter Case
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Sigma AFG9E0 overview

  • 1Description

Characterized by its uniquely durable construction, the 77mm WR Ceramic Protector Filter from Sigma is a clear filter designed to guard the front of a lens from impacts, scratching, and other elements. Developed using a clear glass ceramic substrate, this filter blends a high 99.76% transmittance value with greater hardness than chemically-strengthened glass and greater flexibility than sapphire crystal glass. This results in a build that is shock- and scratch-resistant to withstand a variety of impacts while shooting. Additionally, a water-repellent coating has also been applied to resist water droplets and fingerprint smudging, as well as static electricity from attracting dust or other particles. Built for use in trying conditions, the unique design of the WR Ceramic Protector Filter helps to maintain the lens' inherent image quality while affording a high degree of protection.

Clear protection filter guards the front lens element from a variety of impacts and scratching without affecting image quality.
Clear glass ceramic is a highly durable substrate that has a greater hardness than chemically-strengthened glass and more flexibility than sapphire crystal glass.
Unique construction has a Vickers hardness number of 700HV, making it both scratch- and shock-resistant. This hardness also lessens the likelihood of scratching or chipping that can lead to the filter shattering.
Rather than only the surface structure being hardened, clear glass ceramic involves a heat treatment process that precipitates microcrystals of a mineral called spinel in order to achieve consistent, even strength across the entire filter surface. This strength also enables the design of the filter to be notably thin and lightweight.
A water-repellent (WR) coating has been applied that, in addition to preventing water and oil from adhering to the filter surface, also helps to minimize ghosting and flare. This coating reflects 0.24% of light, giving an overall transmittance value of 99.76%.
The WR coating also serves as an anti-static coating, which helps to repel dust or other particles from clinging to the filter surface.
The included hard acrylic case protects the filter when not in use and has been designed to prevent accidental, unwanted opening.
UPC: 085126931827
In the Box
Sigma 77mm WR Ceramic Protector Filter
  • Acrylic Filter Case
  • Limited 1-Year North and South America Warranty
  • Limited 3-Year U.S.A. Warranty Extension
  • Table of Contents
    • 1Description

    Sigma AFG9E0 specs

    Filter Type Clear
    Filter Factor 1 (+0 Stop)
    Shape Circle
    Circular Size 77 mm
    Front Accessory Thread / Bayonet 77 mm
    Filter Material Glass
    Coatings Multi-Coating
    Packaging Info
    Package Weight 0.25 lb
    Box Dimensions (LxWxH) 4.9 x 4.1 x 0.8"

    Sigma AFG9E0 reviews

    77mm WR Ceramic Protector Filter is rated 4.7 out of 5 by 10.
    Rated 4 out of 5 by from Should we or shouldn't we? The first dilemma is whether we really NEED a filter to protect our lenses. To reduce risk, I've always chosen the filter route. Yes, with modern digital a UV lens is probably unnecessary most of the time. And this isn't even a UV filter. In fact, it's not even a filter! - it's a lens protector, and according to the specs its impact on the image it captures is virtually none whatsoever. It's also tougher (less risk of the 'filter' failing), and thinner (less likelikhood of interfering with the integrity of the photo).I tried pacing it yesterday against my B+W UV Haze MRC 010M Filter and no matter how hard I tried, I frankly couldn't detect any difference. But of course I don't have the testing facilities of a lab like DxO, so please don't draw any conclusions from that.More expensive than the B+W. But as I said, it's tougher, and with lenses ranging between a grand and nearly 5 grand, that means more to me than an extra 60 bucks on a filter to protect them.
    Date published: 2016-02-11
    Rated 5 out of 5 by from Great protective filters I own several Sigma Ceramic WR filters from 67-82mm. All of them are great, and none of them have been scratched or otherwise damaged in any way. I have not noticed any issues with flare or other impacts on the image quality. They are resistant to getting smudged, and they are very easy to clean. Price wise, they cost about the same as BW XS-pro. I prefer Sigma because of the stronger glass and because they are easier to clean. The XS-Pro slim filters have a slightly thinner frame, and hold a theoretical advantage with regards to vignetting.
    Date published: 2018-05-02
    Rated 5 out of 5 by from Wouldn't expect my best lenses to make do, without one! I'll start with a PS - one question further down is would I recommend this filter to a friend. Despite the obvious cost of it, I now have THREE of them. On my most expensive lenses. (The other lenses in my kit now have the benefit of my best UV filters. Which, in the unlikely event that I actually need a UV on one of the top lenses, means I can borrow one for the day from one of the others). It's not a filter - it's a lens protector. Tests show it's remarkable at providing protection to the front element of our lenses. Transmission of light is an astonishing 99.76% and I'm happy to trade the other 0.24% for the security & peace of mind this product provides. The lenses I use it on are Zeiss Otus & (is this pure co-incidence?) Sigma ART lenses - chopping 0.24% off their performance is meaningless, the next lens down the ladder is so far behind these bits of glass that it's a no-brainer, choosing to use them. If and when it REALLY is an issue, I can take the ceramic filter off, for the shoot, and replace it afterwards. Back to the security & peace of mind of having these lenses protected, when that degree of interference is not an issue. BTW - LensTip did a review of a couple of dozen well known UV filters a while back - their interference with visible light ranged mostly between about 2% & 5%, with a couple of outlying ones dropping over 10% of the visible light. If I recall correctly, only one scored higher than 98.2% transmission of visible light and it scored something like 98.9%. Unfortunately it wasn't very effective at blocking unwanted UV, either - it allowed about a third of UV through, too !!! That said, NONE of them beat Sigma's ceramic filters for transmission of visible light.
    Date published: 2016-06-03
    Rated 5 out of 5 by from I am going to get another 77mm. Solid build, no color cast. Easy to attach other filter holders to, such as Lee adaptors. While this is simply intended as front element protection, I have no intent on testing!
    Date published: 2016-12-13
    Rated 4 out of 5 by from Think of it as insurance Four stars instead of 5 only due to the manufacturer's price point. Haven't put it to the test since purchasing this item as I try to be very careful with my gear. However in reading about the Ceramic Protector Filter as well as watching video produced by the manufacturer in my view it's likely worthwhile as an ounce of prevention.
    Date published: 2016-06-29
    Rated 5 out of 5 by from 77mm WR Ceramic Protector This Sigma ceramic lens protector is superb. I've using this product a lot this past week, and no dust has shown up, it's clear as it could be. I am using the 77mm filter on my Nikon 80-400mm AF-S G Ed VR and my 24-70mm lenses. I thinking about getting a second one. Go for it, you won't be disappointed
    Date published: 2016-05-22
    Rated 5 out of 5 by from insurance The Ceramic Protector filter was added to my everyday lens (Canon 24-70 f2.8L) primarily as a bodyguard. It appears to be precisely made, was easy to mount, and has, thus far, provided the anticipated extra level of protection for my lens. I would heartily recommend it.
    Date published: 2016-02-09
    Rated 4 out of 5 by from Works Expensive, but no issues. One star off for being expensive.
    Date published: 2017-03-16
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