help / need guide how to do / set up welding glass shot

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scottyboy

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Name
scott
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hello all,
i have see the treads about showing photo's
i need a how to do guide

i have set up the photo to shot on nikon d100 on manual
set it up for the shot
1/2 pressed the shoot button to focus and
got the readings of
a - f5.6 and s - 100
then added the glass over lens and turned down 10 stops to say 1 second
then full press the button to take photo
and it will not take the shot

what am i doing wrong?

:-):bang:
 
currently got a nikon af 50mm1:1.8d lens
which has not got a switch on the side to switch focus

would i have to use a lens with auto / manual switch
like my normal kit lens
 
Focus manually with the filter not in place (or half press the shutter to AF, then release the shutter, and flick the switch to MF, so it doesn't try to focus when you fully press the shutter later).

Set the aperture to something like f/11 ish, for a good depth of field. Attach welding glass (being careful not to turn the focus ring).

Take a test shot. Start with say, 30 seconds, then if that's wrong, double/halve it. Keep repeating until you get shots that look o.k.

This is a very basic way of doing it, you can half press to get the aperture and shutter speed at the given iso (without the filter), then multiply the shutter speed by 2 for every stop of light difference caused by the filter, but in order to do that you need to know the strength of your welding glass, doing a series of callibration shots!

Confused yet :D

Edit: Forgot to say, the reason why it won't shoot is probably due to the fact it can't get a focus lock. Also, most filters aren't 10 stops like an actual filter, mine is 13.3 for example!

Edit again: I only skim read your opening post, sorry if I came across a little patronising! :) Sounds like you're already good to go with the exception of the focus!
 
thanks for the info,

the sahde is shade 11

so i will try it out over the week end
 
I've got a couple of welding glasses - 2 x #10 shades, one of which was 13 stops, the other 12.3. I've also a #11 which came out at 14.6 stops (but turned out to have a flaw (bubble) in the glass that I only noticed after use :( so it went in the bin!)

The shade numbers don't equate to stops - I think that they may be attenuation factors for UV light (the main output of welding flash) rather than visible light :shrug:
 
hello
i have a shade 11 but just tried it out side @
30 + 60 + 90sec
on 90 sec just starting to get a photo - but very dark
will try more later - but will need to ad the tri pod

don't think i can hand hold that long

:-)
 
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