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FORUMS Photo Sharing & Visual Enjoyment Still Life, B/W & Experimental 
Thread started 15 Oct 2009 (Thursday) 10:31
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Welding Glass (£1/$1 ND Filter) Exposures

 
Virto
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Jun 14, 2012 13:44 |  #1981

c2thew wrote in post #14578997 (external link)
still waiting for my cokin holder to arrive so that I can use gorilla glue to attach the adapter to the welding glass

I'm still waiting for my cokin knockoff ring AND the glass, but the glass is coming from Indiana - so it'll be here in short order - the ring is coming from China. I'll be waiting a while.


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pwm2
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Jun 14, 2012 15:43 |  #1982

Littlejon Dsgn wrote in post #14578343 (external link)
I figured there was no reason to put a cheap UV in between the lens and welding glass, the welding glass will already have enough of its own issues. I just picked up a step up ring that away there is no addition IQ lost.

The goal with a cheap UV is not to put that between lens and welding glass. But to throw away the glass from the UV filter and just use the ring.


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Littlejon ­ Dsgn
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Jun 14, 2012 15:47 |  #1983

pwm2 wrote in post #14579790 (external link)
The goal with a cheap UV is not to put that between lens and welding glass. But to throw away the glass from the UV filter and just use the ring.

I see .... I guess if I had a UV filter laying around I would have done the same thing, but if you have to order one then a cheap step up ring does the same thing.




  
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pwm2
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Jun 14, 2012 15:55 |  #1984

Littlejon Dsgn wrote in post #14579806 (external link)
I see .... I guess if I had a UV filter laying around I would have done the same thing, but if you have to order one then a cheap step up ring does the same thing.

Yes - a step ring works just as well. Only goal is cheapest way to get the hands on a usable ring.


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Littlejon ­ Dsgn
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Jun 14, 2012 15:57 |  #1985

pwm2 wrote in post #14579845 (external link)
Yes - a step ring works just as well. Only goal is cheapest way to get the hands on a usable ring.

Yup I agree on the cheap side, that’s the entire point of using welding glass :D I hope to get my set up out sometime soon, just need to make the drive to water, or an overpass and watch the cars disappear.




  
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Virto
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Jun 14, 2012 16:00 |  #1986

I like the idea of the cokin knockoff rings better than a basic step ring, just because there's a nice, wide flange for cementing the glass to the ring. A 77mm ring was 2.08 shipped from ebay, but I'll let everyone know if it was worth that much when I eventually get it.


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Littlejon ­ Dsgn
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Jun 14, 2012 16:18 |  #1987

Virto wrote in post #14579874 (external link)
I like the idea of the cokin knockoff rings better than a basic step ring, just because there's a nice, wide flange for cementing the glass to the ring. A 77mm ring was 2.08 shipped from ebay, but I'll let everyone know if it was worth that much when I eventually get it.

That’s a good price, the step up ring was like $2 and I had free shipping on my order already :D

I need to take my glass into a craft store to see if they can cut it down to smaller circle, so I don’t have this huge piece of glass in my camera bag, if they can I have enough glass to make 4 filters.




  
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invicktion
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Jun 14, 2012 18:27 |  #1988

Damn never really knew what a step up ring was, should have gotten that haha oh well. BTW whats a good way to remove the glass from a UV filter?


http://www.flickr.com/​photos/spaied/ (external link)

  
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Littlejon ­ Dsgn
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Jun 14, 2012 18:36 |  #1989

invicktion wrote in post #14580410 (external link)
Damn never really knew what a step up ring was, should have gotten that haha oh well. BTW whats a good way to remove the glass from a UV filter?

Hammer lol




  
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c2thew
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Jun 14, 2012 19:07 as a reply to  @ Littlejon Dsgn's post |  #1990

does anyone experience light leak issues with the cokin filter holder? Hypothetically even if I glued the glass filter to the holder after shaving off the arms, I'm noticing that there is a tiny 1mm space between the step up ring and the cokin holder. I do have a 77mm cokin holder and ring.

anyone else see that gap? Any light leakage will cause a purple halo in your images as I've seen in a few examples of this thread. Might have to look for another solution such as gluing the step ul ring to the welding glass and then using a 77 to 82mm step up ring to compensate.

I'll follow up when my 82mm cokin comes.


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jabtas
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Jun 14, 2012 19:25 |  #1991

No light leakage at all with my glass glued to a Cokin filter holder


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invicktion
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Jun 15, 2012 00:10 |  #1992

Littlejon Dsgn wrote in post #14580430 (external link)
Hammer lol

Isn't there a chance that it will break the glass? Also is a shade 10 welding glass similar to a 14 stop nd filter?


http://www.flickr.com/​photos/spaied/ (external link)

  
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pwm2
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Jun 15, 2012 01:47 |  #1993

invicktion wrote in post #14581614 (external link)
Isn't there a chance that it will break the glass? Also is a shade 10 welding glass similar to a 14 stop nd filter?

Chance to break the glass? That is the goal with the hammer :D

Kill the unwanted filter glass to get a ring to attach the welding glass to.


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invicktion
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Jun 15, 2012 02:00 |  #1994

pwm2 wrote in post #14581810 (external link)
Chance to break the glass? That is the goal with the hammer :D

Kill the unwanted filter glass to get a ring to attach the welding glass to.

Haha well I know the point is to get rid of the glass but obviously you don't want hit with a hammer and have it break with shards of glass around the rim. Or would the hammer simply pop it out of the holder before breaking it?


http://www.flickr.com/​photos/spaied/ (external link)

  
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Littlejon ­ Dsgn
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Jun 15, 2012 08:45 |  #1995

invicktion wrote in post #14581833 (external link)
Haha well I know the point is to get rid of the glass but obviously you don't want hit with a hammer and have it break with shards of glass around the rim. Or would the hammer simply pop it out of the holder before breaking it?

??? Never used a hammer on a filter before, but I would guess that it will brake the glass, then use some needle nose pliers or something to pull out the rest of the glass, not sure you can "pop" it out as a whole piece of glass.




  
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Welding Glass (£1/$1 ND Filter) Exposures
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