For the past three years my wife and I have attended many concerts at the Palladium in Carmel, Indiana. I have posted many photos of the concerts we have attended. Last night we attended "The Oak Ridge Boys" concert, one of our favorites. As usual, I carried my Canon 70D with Tamron 16-300 lens. I was stopped by security at the entrance and told that cameras with removable lenses were not allowed. I argued that I had carried this camera there before, and that I set it so no flash is used. He got on his little radio and checked with his boss, who confirmed, no DSLR cameras. So I took my camera back to the car, re-entered the theater and enjoyed the concert. What is confusing is that before the show, an announcement was made that audio and video recording of the show is prohibited, but still photos were allowed, but the use of flash is not allowed. So of course during the show everybody was taking cell phone photos, most with flash. Just wondering if anyone has run into that problem before.

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Hype, I don't really know, but if the Tiffen transmits 98-99% of the light, that's telling me that 1% or 2% of light is lost ~ which means the Tiffen still isn't as good as a lens without a filter placed in front of it.

As for lens protection, I can understand why some people will use a filter, but I am a person who protects my lenses so well that I treat them as if they were actually my own eyeballs and believe me, if I think that I am going to be subjected to wind blown dust and debris, I don't go out in it ! My eyes and my lenses are far more valuable to me than having the need to take a photograph in inclement conditions. In other words, I am a wuss when it comes to exposing my eyes or my camera lenses to the elements when it is unnecessary.

Even if you have a protective filter on a camera lens, you must also remember that if your lens is a zoom lens and you are in dusty conditions, dust will get inside the lens and when dust gets on the inner glass elements of a lens, you will end up with a new set of problems ~ filter or not !

Yes the locks were there in 1940. The St. Lawrence Seaway opened in 1956. Prior to that there was a canal system that dated back to the nineteenth century. I remember as a boy in Montreal during the war visiting my grandparents who lived over one of the powerhouses on the Lachine Canal. (He had been the stationary engineer in charge of it.) We needed a special pass to enter the canal area which was guarded by Canadian soldiers. I have very vivid memories of ships passing within feet of his living room window. In those days Montreal called itself "the world's biggest inland seaport." Ships from Europe would go to Montreal. Cargo would be transferred from or to the lakers which then steamed up the Great Lakes. It was much the same in Cornwall Ontario where I also lived at one time. The old locks in both places as well as the old Lachine and Soulanges canals were abandoned. The once scenic rapids at Milles Roches (a thousand rocks) were flooded. The old Cornwall canal is still there but unused. I'm not sure what happened to the Soulanges and Lachine canals. In think the Soulanges was inundated. Interesting marine history but German U Boats were never a part of it.