Sinai Divers

12/07/2017

Entanglement Causes Elevated Hormone Levels in North Atlantic Right Whales



In a new study, researchers have found stress levels in entangled North Atlantic right whales to be up to 8 times higher than that of healthy whales ... more >

 



12/07/2017

U.S. Government Report Recommends Changes To National Marine Monuments

A U.S. government report is recommending changes to National Marine Monuments. ... more >

12/07/2017

6th Annual “Capturing Critters in Lembeh” Kicks Off



“Capturing Critters in Lembeh,” the annual underwater photography and videography workshop held at Lembeh Resort, is back ... more >

12/07/2017

Photographer of the Week – Wade Hughes



DPG presents Photographer of the Week, Wade Hughes ... more >

12/07/2017

Revealed - the diving bestsellers of 2017

Fifty Places to Dive Before You Die keeps its top spot for another year, although it was run very close by the perennially popular Dive Atlas of the World.

A single DVD makes the list - the fascinating Blue Planet II. If you haven't seen it then buy this even if you buy no other diving book or dvd this year. ... more >

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12/07/2017

More Cinema EOS C300 Mark III Information [CR1]

Earlier in the week we posted some information about the Canon EOS C300 Mark III that came from unknown places. Yesterday we received more information from the same place. It’s starting to feel like we may be getting trolled. Anyway, here’s what else we’ve been told is coming in the new camera. 4K Internal 4:4:4 Read more... ... more >

12/07/2017

DEMA Show 2017 Hosted More Than 7,850 Attendees

More than 7,850 dive industry professionals attended this year's DEMA Show in Orlando, Florida. ... more >

12/07/2017

New Instagram Tool Helps Protect Wildlife



Notification makes users aware about specific instances of abuse ... more >

12/07/2017

Study: Seals Stressed by Great Whites



Researchers measured concentrations of cortisol stress hormones ... more >

12/07/2017

500px Reduces Upload Limit for Free Accounts



Users can only upload 7 images per week, as opposed to the original limit of 20 ... more >

12/07/2017

Diving the Solomons Islands Onboard the Bilikiki


Some liveaboards and destinations are so famous that when you do finally visit, it feels almost familiar. Diving the Solomon Islands onboard the Bilikiki was just such an experience.

The post Diving the Solomons Islands Onboard the Bilikiki appeared first on Scuba Diver Life. ... more >

12/07/2017

Sigma Trade Up Program Gives $350.00 USD Back on Used EF, E, or PL System Mount Lenses Towards Sigma Cine Lens Purchase

Ronkonkoma, NY – December 7, 2017 – Sigma Corporation of America, a leading still photo and cinema lens, camera, flash and accessory manufacturer, is inviting cinematographers to take advantage of the new Cine ‘Trade Up Program’ for the holidays. Sigma is offering camera operators, DPs, and cinematographers $350.00 USD off a Cine lens or lens bundle purchase when trading their Read more... ... more >

12/07/2017

Why do sharks attack?

 Why do sharks attack?Recently there was another shark attack on a spear fisherman in California and a fatal shark bite at Cocos Island in Costa Rica.  Inevitably when someone gets bitten by a shark, there is speculation about why it happened. “Mistaken identity” is a popular explanation, and of course the people arguing “it’s their home” and the “fill in the blank” kills more people than sharks every year are always ready to chime in. There are statistics on shark bites, like the “international shark attack files” by the Florida Museum of Natural History, and we have a pretty good idea of how many people actually get bitten by sharks each year. Most of those statistics only collect data on what happened and are recording the circumstances of the attack. Since in very few cases was the shark actually seen before it bit the victim, most of the information we have is only about what the victims were doing before they got bit. When we discount the provoked attacks, like someone pulling a nurse shark by the tail, a fisherman getting bit by a shark he hooked, or like in the case of the Manhattan Beach incident, a fishermen hooking a shark and pulling it through a group of swimmers, very little is known about what the sharks were doing prior to biting the victim.Obviously I don’t know what those sharks were doing or thinking either, nor do I know what lead them to bite. I wasn’t there and don’t have any firsthand knowledge. What I do have is some first hand knowledge of how some of the shark species implicated in attacks on humans behave and how that behavior might determine why they attack.I have been diving with and observing Great White Sharks for over 17 years at Guadalupe Island and been around Bull-, Tiger- and Hammerhead Sharks for more than 6. What I found is that there are a lot of misconceptions about how these animals behave. Probably the biggest mistake is that people think “A shark is a shark”, pretty much assuming they all behave the same way.There are well over 400 species of sharks, with most of them absolutely harmless to humans. Think about it this way. We have the top 10 deadliest sharks list. With an average of fewer than 10 fatal shark bites worldwide each year, that means that if a species is listed as #10, it stands to reason that that species is responsible for fewer deaths than #1, it may in fact only be responsible for a death every 30-40 years. Most of the species responsible for deadly bites on humans are the Great White, Tiger and the Bull Shark. So let’s take a look at a couple of those species.Great White SharkThe Great White Shark is probably the most feared animal in the world. Movies like “Jaws” and the way the media reports any encounter with them have instilled fear into most people who contemplate going into the Ocean. The thinking that one drop of blood in the water will cause a huge frenzy and pretty much any shark within 10 ... more >

12/07/2017

Patent: Lots of Big White Lens Patent Applications Surface

New patents for supertelephoto optical formulas have appeared at the USPTO. The range of formulas is quite vast, all the way from a new EF 300mm f/2.8L IS to a new EF 800mm f/5.6L IS design. We do think there will be some new “big white” lenses announced in the next 12 months, not including Read more... ... more >