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Sigma 72mm WR Ceramic Protector PTC-21 Filter
Product Code: G334561B
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Protect your lens with high-strength Clear Glass Ceramics and a 72mm WR coating that repels water, oil, fingerprints and fine dust.
Summary
The flagship protector in the range uses high-strength Clear Glass Ceramics rather than conventional chemically strengthened glass. The material is harder than the latter while remaining more flexible than sapphire crystal, providing greater reassurance where impact resistance is a priority.
The WR coating repels water and oil, makes fingerprints easier to wipe away and uses antistatic properties to resist fine dust. Frame treatment on this generation also reduces internal reflections compared with earlier models, all without affecting exposure.
Frequently Asked Questions
What are Clear Glass Ceramics, and why do they matter?
A high-strength material also used in aerospace and other advanced industries. It combines greater hardness than conventional chemically strengthened glass with more flexibility than sapphire crystal, giving it properties particularly well suited to protecting the front element.
What does it add over the standard LPT-21?
This is the flagship option when impact resistance is the priority. Its high-strength ceramic construction provides a step up from the standard clear protector, although both are intended to guard the front element during everyday use.
Does the added strength affect exposure?
No. Despite the more protective construction, there is no change to exposure during normal shooting.
What does WR mean?
Water repellent. The coating also resists oil and fingerprints, while antistatic properties help stop fine dust settling on the surface.
Can I leave it on permanently?
Yes. It can provide ongoing front-element protection without affecting exposure, while the WR coating makes regular cleaning easier.
Key Features
- 72mm thread diameter
- High-strength Clear Glass Ceramics
- Flagship protector with exceptional impact resistance
- Harder than conventional chemically strengthened glass
- More flexible than sapphire crystal
- Water and oil-repellent WR coating
- Antistatic properties help resist fine dust
- Fingerprints wipe away easily
- No effect on exposure
- Revised frame treatment reduces internal reflections
- Secure lens cap attachment internal reflections
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Condition guide
Our used products are subject to wear and tear in comparison to brand new products. This also applies to accessories that are supplied with the camera including batteries which may have a lower optimum performance level/life expectancy.
- Like New – The equipment is in a condition as if you have just bought it from the manufacturer. The item is still considered to be ‘Like New’ even without the original packaging and accessories. The product has been fully tested and is in perfect working order. Lenses are optically clear. There may be light dust present that will not effect the imagery.
- Excellent – The equipment should be close to being ‘Like New’ but there may be some small cosmetic blemishes that lower its grade. The product has been fully tested and is in perfect excellent order.
- Cameras – Should have no marks on the LCD screen
- Lenses – Should have no marks on the elements and optically clear. There may be light dust present that will not effect the imagery.
- Very Good – The equipment may have some slight cosmetic wear to the paintwork and cosmetic blemishes with only light signs of use and the product has been fully tested and is in great working order.
- Cameras – The LCD screen may have small signs of wear that does not affect its display
- Lenses – The mount of the lens will start to show signs of wear
- Good – The equipment is showing more obvious signs of cosmetic wear and blemishes, but the product has been fully tested and is in great working order.
- Cameras – LCD screen may have scratches or wear that is starting to affect the display.
- Lenses – May have slight dust inside that does not affect images. The mount shows signs of use.
- Well Used – The equipment will show significant signs of wear. The paintwork will be coming away in large areas exposing the metal work, but the product has been fully tested and is in great working order.
- Cameras – LCD screen is heavily worn either by de-lamination or has scratches to it. Rubber grips are starting to come away from the body.
- Lenses – The lens has dust inside that may affect images. The rubber zoom/focus ring is coming away from the barrel of the lens.
*All of our used items are listed with the accessories that are included. If they are not listed, then they will not be supplied at the point of purchase.
Why Buy Second Hand from Park Cameras
Park Approved Stock
Our used stock goes through a rigorous quality process. Each item is carefully inspected by our experienced specialists during the trade-in process and checked again before being listed for sale. This ensures you can shop with total peace of mind, knowing your gear has been thoroughly tested and approved.
Upto 12 Month Warranty
Shop our used gear with total confidence. Every item comes with upto a 12-month warranty (unless stated otherwise). Get the best brands for great value, and peace of mind all in one place. Don’t miss out — upgrade your kit today!
14 Day Returns Policy
When you purchase a Used item, you have a 14-day returns policy if the item isn’t as described. Enjoy peace of mind while getting great value on pre-owned gear!
