Welding Glass white balance???

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leeharrison2

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Lee Harrison
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I bought myself a piece of welding glass after reading a thread on here about long day time exposures and it worked quite well but still a work in progress but I have to take then all in black and white because of the green cast, I have seen a number of pictures using the same method but in colour by adjusting the white balance... I’ve tried reading on numerous webpage’s but can't get my head around it...

Please can someone help me??? And if it makes any difference I use a Nikon D40

Thank Lee Harrison
 
I think you will find people alter the white balance in PP when on the computer and not try to use the camera for adjustment. I've just tried welding glass for the first time myself and although I've got resonable results I've yet to get the WB right.
 
You can set a preset White balance on your D40.
Pages 70/71 in the manual.

Put the welding glass on the camera and have a sheet of white A4 paper ready.

On the camera select:

Menu/Shooting Menu/White Balance/PRE/Measure
If it asks if you want to overwrite existing preset data select Yes.
Then take a photo with the A4 paper filling the frame with the same lighting you will be taking your photos with.
You will then be able to select PRE as a White Balance setting.
 
I do it in post. There's slightly more to it than just the white balance as the response to some colours is different. From memory, the green and blue channels need a seperate tweak even after the white balance is adjusted.

My basic preset in Lightroom is to adjust the white balance to 4200K with Tint 131, then go play with the channels, YMMV depending on you piece of glass.. I think it's far easier to shoot raw and do this properly in post with a preset than to try and nail a custom white balance that is only going to get you partway there anyway. One day I'll borrow a friend's colour passport and get the preset nailed properly.

 
thank you for the advice, I dont really do much it any post editing, I like to let the camera do as much as possible really and understand everything that it can do but I've only just starting to use photoshop SC4 to experiment with HDR and a few different effect, will CS4 read nikon raw files because I heard that it didn't and how hard is it to get white balance right in post processing???
 
Suvv said:
You can set a preset White balance on your D40.
Pages 70/71 in the manual.

Put the welding glass on the camera and have a sheet of white A4 paper ready.

On the camera select:

Menu/Shooting Menu/White Balance/PRE/Measure
If it asks if you want to overwrite existing preset data select Yes.
Then take a photo with the A4 paper filling the frame with the same lighting you will be taking your photos with.
You will then be able to select PRE as a White Balance setting.
Click to expand...

thanks for the advice, I seemed to have misplaced my manuea :s ... will it pick up the white paper ok through the welding glass, should I just open up my shutter to get a properly exposed shot??
 
leeharrison2 said:
thanks for the advice, I seemed to have misplaced my manuea :s ... will it pick up the white paper ok through the welding glass, should I just open up my shutter to get a properly exposed shot??
Click to expand...

When you get to the final step in my post the camera will prompt you to take a picture and it will make all the necessary settings, with welding glass you will probably need lots of light.
 
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