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welding glass as nd filter


CDSINUK 2 223 England
28 Sep 2012 12:07PM
i have some ND filters and have just purchased a 2-400 stop filter but am awaiting delivery, so i thought i would have a bit of fun with the welding glass technique, however one question, how do i get sharp focus as the camera will not lock on through the glass, i have tried to focus without the glass in front, and then attach it, turning off the auto focus, but the images are blurry? any suggestions, and before you say it, i will wait for the proper filter but just wanted to have a bit of fun with this? could it be the glass itself causing distortion ?

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puertouk 3 1.1k 17 United Kingdom
28 Sep 2012 12:25PM
The trouble with welding glass is you would get a colour cast, plus the optics would be poor, giving you a poor image.
parallax e2
5 121 United Kingdom
28 Sep 2012 1:56PM
It's great for the purpose it was designed for. Optically it's crap. Lol
RoyBoy 10 173 2 United Kingdom
28 Sep 2012 2:58PM
I applaude your efforts in trying this. Sometimes you don't want sharp to create an interesting image. Look at Irene Froy's work and the lovely diffused effect she achieves through a certain type of glass. Only last Monday I saw a lecture by a chap, some of whom's images were shot through some plastic. They were beautiful.

If your glass works as a "big stopper" type effect but has a colour cast that you can't correct maybe it can be converted to mono.

Experimentation is good!!

All the best
Roy
User_Removed 5 4.6k 1 Scotland
28 Sep 2012 4:02PM

Quote: Sometimes you don't want sharp to create an interesting image.

Experimentation is good!!

All the best
Roy



Absolutely. Some deluded folk spend real money on something caused a Lens Baby just to get distorted, out-of-focus pictures that I find I can produce quite naturally. And if I need an exaggerated effect, a big gob of saliva on the lens works wonders.

Smile Wink Grin
CDSINUK 2 223 England
28 Sep 2012 4:53PM
lol like the saliva one, MMMMnnn better wait till my chest infection has got better Smile thanks for the advice and the iluminating idea's guys , i think the glass would work well ion fast moving clouds and running water though, managed to get rid of most of the green with white balance in raw,
widtink 2 406 2 Scotland
28 Sep 2012 6:28PM
i used it recently only for b/w but i thought it worked fine enough Smile

Rod
widtink 2 406 2 Scotland
28 Sep 2012 6:30PM
my camera was on a/f and i got sharpish images maybe iam just a really good photographer though Tongue lol

Rod
CDSINUK 2 223 England
28 Sep 2012 6:48PM
i am using a Sony Alpha A230 the only camera in the world you cant get a timed shutter release for lol, i tried the AF but it wouldnt lock on?
CDSINUK 2 223 England
28 Sep 2012 6:52PM

Quote:My camera was on a/f and i got sharpish images maybe iam just a really good photographer though Tongue lol

Rod


Rod What are you insinuating !!!! lol Smile

your probably right, im just a fledgling photoglafer Smile what does the big shiny button do?Smile
thewilliam 6 4.8k
28 Sep 2012 8:14PM

Quote: ...how do i get sharp focus as the camera will not lock on through the glass, i have tried to focus without the glass in front, and then attach it, turning off the auto focus, but the images are blurry? any suggestions, and before you say it, i will wait for the proper filter but just wanted to have a bit of fun with this? could it be the glass itself causing distortion ?


This might seem a silly question, but is the camera mounted on a good firm tripod or are you trying to hand-holding? Provided everything is firmly mounted, even a welding glass should give a nice picture.
Jestertheclown 6 6.6k 242 England
28 Sep 2012 8:39PM
There was another thread on this subject running on here very recently.

Might be an idea to look for it?
CDSINUK 2 223 England
29 Sep 2012 9:48AM
Hi william, yes all mounted firmly on a tripod, and thanks jester, but no i wasnt aware that there was another thread, i guess i would have looked at it if i had known but thanks for the input, i will try and find it Smile
kaybee 10 3.9k 24 Scotland
29 Sep 2012 12:59PM
dcash29 9 2.0k England
29 Sep 2012 9:00PM
Are you sure the lens focus didnt move while fitting?

Glue the glass to an old screw filter ring.

The green cast should be easy to rectify.

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