Pixtus - Photography Forum, Photographers, Photo Tips

Sonny · **Use Welding Glass As 10 Stops ND Filter -** 05-25-2011, 10:29 AM

This is resourceful.
Use Welding Glass As 10 Stops ND Filter | DIYPhotography.net

venchka · 05-25-2011, 10:53 AM

The rubber bands behind the lens hood is cool.
Use B&W film to avoid the color shift. Grinning.

Saltwater Servitude · 05-31-2011, 04:12 AM

In the comments on that article is a link to this site:

Simple Variable Neutral Density Filter

That shows how to use two circular polarizers to get a 10 stop variable filter, from 4 to 14 stops darker. Pretty dang neat, and you don't have to worry about light leakage.

venchka · 05-31-2011, 08:46 AM

Quote:

Originally Posted by Saltwater Servitude

In the comments on that article is a link to this site:

Simple Variable Neutral Density Filter

That shows how to use two circular polarizers to get a 10 stop variable filter, from 4 to 14 stops darker. Pretty dang neat, and you don't have to worry about light leakage.

I'm surprised that solution isn't mentioned more often. I discovered the effect of two polarizers by accident one day. It does work.

TxLerman · 06-01-2011, 10:44 AM

Has anyone here ever posted pictures with the welding glass? I'd like to look at them.

Mosephus · 06-01-2011, 11:22 AM

Here is a thread on Photography-on-the.net with quite a few welding glass images.
Welding Glass (£1/$1 ND Filter) Exposures - Canon Digital Photography Forums

Aquase · 06-03-2011, 11:09 PM

What i did was, take picture, set white balance to the picture. Then This picture is what comes out SOOC.

Then I made a custom camera profile, to help get rid of the green quickly.
I figure I will have to adjust it a bit everytime but this gets rid of most of it.
This is the profile without any other corrections.

I cannot wait to get out and actually try this with moving water or something moving.

BTW, the Camera was an XTI, and the lense was a Sigma 10-22 at a 30 second exposure.

I just got the lense, and have not gotten the chance to go out and get some good pics with it. The purple ring is from light entering, as I only rubber banded the glass to the lense. Once I get it mounted properly, or get a shade over it it should turn out great.

z-monster · 06-04-2011, 02:04 AM

An interesting tool indeed!

Thanks for sharing!

scottbuckel · 06-08-2011, 06:06 PM

Color correcting images when using ND filters can be challenging - the long exposures we want allow for IR contamination. As suggested by Ryan create a custom profile as it will save you much time and headaches as I know from experience . . .

I have thought about getting a welding glass filter since the Lee Big Stopper is over $300 these days if you can find one. Maybe I'll try it and learn how to make a custom profile.

Scott

KD5NRH · 06-09-2011, 03:45 AM

IIRC, I used a shade 10 and a shade 6 stacked for solar eclipse viewing, but used them in a rubber hood that did a great job of taking care of light leaks. I'd think that careful work with a cheap rubber lens hood turned backward and black siliconed to the welding glass would make a slip-on filter with little to no leakage.

Nocturnus · 07-26-2011, 02:23 PM

Yeah, I've been watching the POTN thread for a bit. About to go grab a #11 filter here local and give it a try..

ChrisTX · 07-26-2011, 03:36 PM

Quote:

Originally Posted by Nocturnus

Yeah, I've been watching the POTN thread for a bit. About to go grab a #11 filter here local and give it a try..

Get that cheap sticky sided weather stripping. Put your lens against the glass, then put the weather stripping around it to fit. That's what I did. It keeps you from having light leaks, and it keeps the lens from moving around against the glass.

scottbuckel · 07-26-2011, 03:45 PM

I just picked up a #9 and a #12 - cost about $5 for the two of them. Does anyone know what the numbers actually mean? I can readily see that the #12 blocks more light than the #9. Have not used them with the camera yet, but will in the next week or so.

Scott

Nocturnus · 07-26-2011, 06:07 PM

I've got an idea that uses a larger step down ring for mounting.

I'm gonna play around and try to figure out how many stops my #11 is. I think I'll also get one that lets a little more light through.. Still trying to figure out the best way to go about figuring out how many stops these things are..

Would it just being as simple as say going to Av mode and f/22 and getting a good exposure then putting the glass over the front of the lens and then opening up the aperture till I get another good exposure?

ChrisTX · 07-26-2011, 08:07 PM

I have a #10 shade, and at f/8 during the day, I need about an 80 second exposure.