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 Post subject: Welding Glass?
PostPosted: Tue Mar 08, 2011 5:32 am 
I was browsing Flickr groups and came across a group discussing welding glass at the end of their lenses. I had never seen this before and after doing some quick research it appears to be a quick and cheap attachment to give photos a cool look to them.

Here is the Flickr thread discussing it and then a forum I was reading where others were discussing it.

http://www.flickr.com/groups/weldingmas ... 327426714/

http://www.talkphotography.co.uk/forums ... p?t=218980

I'm wondering if any of you have tried it and if so, what were your results? It looks like it could be a relatively cheap and cool thing to try.


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 Post subject:
PostPosted: Tue Mar 08, 2011 5:44 am 
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Location: St. John's, NL, Canada
I don't see why it wouldn't work... I mean, it's essentially an ND filter... having said that, I don't see a situation where it would excel over an ND filter - they come with a handy thread that screws onto your lens :)


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 Post subject:
PostPosted: Tue Mar 08, 2011 8:46 am 
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I've used two of them ages ago to shoot a solar eclipse, obviously with a film camera. It worked but, well, glass quality is for welding you know.

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 Post subject:
PostPosted: Tue Mar 08, 2011 12:30 pm 
is not paying for a cheap ND filter worth putting a very low quality plastic or glass in front of your lens?


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 Post subject:
PostPosted: Tue Mar 08, 2011 7:29 pm 
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Location: west coast of Norway
@Razvan: you will have a hard time finding a cheap ND filter with the same "darkness" as a piece of welding glass, and normally welding glass is quite good quality considering what they are made for.

i just checked with a welding glass and got 1/1000sec, 1/3stop overexposed without the glass and 15sec 2/3stop underexposed, so that equals around a 14 stop reduction.

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 Post subject:
PostPosted: Tue Mar 08, 2011 7:35 pm 
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Yes, ive used it as a 10 stop filter, allows for long shutter times during daylight.

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 Post subject:
PostPosted: Tue Mar 08, 2011 10:09 pm 
yes I agree,it has a mega stop reduction...still,14 stops seems a bit too much for a lot of aplications.


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 Post subject:
PostPosted: Tue Mar 08, 2011 10:39 pm 
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Location: west coast of Norway
well, yes 14 stops is quite alot.

but that is for a DIN 13 glass witch is the second highest grade you can get without special ordering (atleast here).
DIN 3 to 13 is quite common. but DIN 9 to 11 should be perfect for photographic purposes.

the lower grades is very suitable aswell since they normally are made round.

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Canon 50mm 1.4 USM, 100mm F2.8 USM, 70-200 F2.8 L IS II,
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Sigma 300mm F2.8

Canon Pixma PRO-9000 MKII

and a 17-40 F4L in a hundred little pieces


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