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Author Topic: How tough is the glass of a lens? (8-15)  (Read 10246 times)

Quasimodo

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How tough is the glass of a lens? (8-15)
« on: December 30, 2012, 07:20:25 PM »
I have this shot planned where I place my camera with my 8-15L on a Manfrotto table tripod with a phottix aion remote release on the ground to capture a squirrel and some birds up close at 14mm (we have a place where we put food, and they eat there everyday). Would they be able to scratch the front element and destroy it?
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How tough is the glass of a lens? (8-15)
« on: December 30, 2012, 07:20:25 PM »

bycostello

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Re: How tough is the glass of a lens? (8-15)
« Reply #1 on: December 30, 2012, 07:32:54 PM »
they are very tough but not squirrel proof!

Quasimodo

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Re: How tough is the glass of a lens? (8-15)
« Reply #2 on: December 30, 2012, 07:35:25 PM »
they are very tough but not squirrel proof!

Ok, thanks.
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Mt Spokane Photography

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Re: How tough is the glass of a lens? (8-15)
« Reply #3 on: December 30, 2012, 08:49:53 PM »
Priority is given to glass that can be ground and has the correct optical properties.  Toughness might just happen with those things, but its not first priority. Getting glass that is hard and grinds well also probably makes it a bit brittle.  There is sure to be some tradeoffs.  That front element usually does not have any tough refraction demands, so its likely selected for toughness.  With some lenses, it is merely a protective element to protect the fluorite which is very fragile.

CharlieB

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Re: How tough is the glass of a lens? (8-15)
« Reply #4 on: December 30, 2012, 10:18:47 PM »
My old Pentax rep, Tom Hillbourn, used to put his cigarette out on the front element of a Pentax fisheye.  I saw that trick done dozens of times on the same lens with no detectable ill effects to the glass or coating   But, it was a trick.....

I'd worry more about sand abrasion from being in close proximity to the ground.

timmy_650

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Re: How tough is the glass of a lens? (8-15)
« Reply #5 on: December 31, 2012, 12:05:39 AM »
What about putting a filter on the lens? If that gets scratch take it off.

CharlieB

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Re: How tough is the glass of a lens? (8-15)
« Reply #6 on: December 31, 2012, 12:15:38 AM »
Timmy the  8-15 is a fisheye-zoom, and there's really no way of putting a filter in front of the lens. 

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Re: How tough is the glass of a lens? (8-15)
« Reply #6 on: December 31, 2012, 12:15:38 AM »

Quasimodo

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Re: How tough is the glass of a lens? (8-15)
« Reply #7 on: December 31, 2012, 05:10:41 AM »
Thank you. I'll skip it this time, and bring my 16-35 next time I am here. At least that one is protected.
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sandymandy

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Re: How tough is the glass of a lens? (8-15)
« Reply #8 on: January 05, 2013, 05:21:31 AM »
Timmy the  8-15 is a fisheye-zoom, and there's really no way of putting a filter in front of the lens.

Just use duct tape and cardboard to build some kind of "cage" around the lens front and then duct tape a filter to it. Or build some (acrylic)glass cage and put ur camera inside if u wanna go real serious :D

Quasimodo

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Re: How tough is the glass of a lens? (8-15)
« Reply #9 on: January 05, 2013, 07:39:20 AM »
Timmy the  8-15 is a fisheye-zoom, and there's really no way of putting a filter in front of the lens.

Just use duct tape and cardboard to build some kind of "cage" around the lens front and then duct tape a filter to it. Or build some (acrylic)glass cage and put ur camera inside if u wanna go real serious :D

:)
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victorwol

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Re: How tough is the glass of a lens? (8-15)
« Reply #10 on: January 06, 2013, 01:17:15 PM »
The lens cap of the 8-15 is pretty good. I would not stop buying the lens I want because it can get scratched. Get insurance. Is cheap. And enjoy your lens. Unless you don't really want it. Is a great lens and a lot of fun to use it.
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Quasimodo

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Re: How tough is the glass of a lens? (8-15)
« Reply #11 on: January 06, 2013, 02:58:20 PM »
The lens cap of the 8-15 is pretty good. I would not stop buying the lens I want because it can get scratched. Get insurance. Is cheap. And enjoy your lens. Unless you don't really want it. Is a great lens and a lot of fun to use it.

I have the lens and will use it a lot. It was just a fun photosetup that I was contemplating, thus the question. I will bring my 16-35 II next time I am there, which has a B&W filter, thus no danger to the lens :) It does not give me the same angle, but will be sufficient to capture the squirrel, birds, and the forrest mice that are all fighting over the same food :)
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bdunbar79

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Re: How tough is the glass of a lens? (8-15)
« Reply #12 on: January 06, 2013, 06:55:37 PM »
Not as tough as Chuck Norris or Mike Ditka.
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Re: How tough is the glass of a lens? (8-15)
« Reply #12 on: January 06, 2013, 06:55:37 PM »

Quasimodo

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Re: How tough is the glass of a lens? (8-15)
« Reply #13 on: January 07, 2013, 02:21:00 PM »
Not as tough as Chuck Norris or Mike Ditka.

LOL!

You know that Chuck Norris has two facial expressions? One with a hat, and the other one without :)
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wickidwombat

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Re: How tough is the glass of a lens? (8-15)
« Reply #14 on: January 08, 2013, 01:48:38 AM »
Not as tough as Chuck Norris or Mike Ditka.

speaking of which I lost my S**t when in the expendebles II chuck norris rocks up and tells a chuck norris joke
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Re: How tough is the glass of a lens? (8-15)
« Reply #14 on: January 08, 2013, 01:48:38 AM »