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The IST Corona Mask has a glass positive diopter that will prevent fog from clouding your vision and a black silicone skirt that will block reflecting light, giving you a clear view of the underwater world.
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IST Corona Mask
+ Black silicone skirt blocks skirt light from reflecting off the lens and reducing visibility.+ The lenses are tempered glass to resist scratching and allow thorough cleaning.+ + + IST Corona is one of the very few masks available with positive diopter lenses, and maybe the only one available with glass positive diopter. Get a spare mask with standard lenses and save a bundle when your optical mask gets a broken buckle or the cockroaches get an opportunity and eat the edges of the water seal.- You must thoroughly scrub the new lens with toothpaste or a paste of baking soda and water to remove the coating on the lens or it will be plagued with fogging. (Note: If you do this to a PLASTIC lens, like SeaVision's, it will be ruined!)
Big Pine Key, FL
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They're great but hard to get the lenses in...
My mask leaked for a while and it took some work to get the lenses in properly. I wish I went up a diopter but I can't find them on the Swimoutlet.com website anymore
They work very well and keep the water out of my sinus.
it's nice to see underwater
The lenses were fairly simple to change, although there were no directions on mask disassembly. Once in place there are no diopter markings on the lenses, so if I have to change lenses again it will be more difficult getting the correct lense in the correct place.Overall it's a good mask for the money.
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IST Sports™ specializes in SCUBA diving gear. Since its beginnings in 1975, IST has established itself as a reliable source of high-quality diving equipment, now recognized internationally as a top-of-the-line diving brand. Their original focus was on masks, snorkels and fins, but over the years they have expanded their offerings to include the full range of SCUBA gear, from buoys to wetsuits to diving knives.
IST makes quality a priority, since successful SCUBA diving hinges on gear you can trust. IST masks are not only comfortable, but are also water-tight and easily adjustable for the best possible fit. Snorkels are designed with the SCUBA diver in mind, including details like a large purge valve, splash guard and lightweight tubing. IST clothing like wetsuits, booties, caps and gloves make it possible for divers to outfit themselves for cold water dives with durable yet affordable pieces. Their gear covers the gamut of cold to warm water users, recreational to spear fishing divers and affordable to high-end.
IST wetsuits, IST snorkels, IST fins, IST masks and IST knives are excellent pieces of SCUBA gear for anyone who has a passion for diving – whether beginner or seasoned Expert. Whether you need just a replacement mask or a completely new set up, IST has a selection of gear that is sure to meet your needs. With IST, divers know they're getting the highest quality equipment from a company with decades of experience in the diving community.