Welding Mask Glass

I have a bog standard K10D and have lifted the figures from a photocopy from the manufacturers and compared their figures with a table from Wikipedia (ND filters)

No idea - I walk into the shop when I need things.

Do you have a local industrial tool/welding store? (Just realised where you are)


Thought these might be of interest (nothing special, just my back garden) taken to assess the #10filter

#1 taken without any filter 1/10 sec f32 ISO400 for reference
[IMG]http://i1236.photobucket.com/albums/ff444/Frogherder/IMGP6801.jpg[/IMG]
#2 taken with No 10 filter 120sec f27 (no idea why it changed - must have caught the thumbwheel) ISO400 then photoshop in an attempt to emove the green cast
[IMG]http://i1236.photobucket.com/albums/ff444/Frogherder/IMGP6807a.jpg[/IMG]

Bernard

Lovely garden, but is this an appropriate scene to test such a filter?

Those are actually the same shot 35mm - f32 - 1/10 - ISO400 (check the EXIF data), which is why I can't see any difference You've linked to the same image in both cases.

I'd thought that the primary use for a 10 stopper would be where flowing water or clouds were in the scene, to give them that creamy look.

If I do, I wouldn't know what it looked like, or what to ask for when I got inside

Whoops, edited accordingly.

Shot in the garden simply to gauge the "stoppage" if the set up - easier than fiddling out in the field

Bernard

pS
Sorry Peter I can't help you there - I don't even know if there is an equivalent to Yellow Pages over there, but Spain is an industrial country so I assumed there would be

Curiosly enough, we do. It's called Paginas Amarillo (Yellow Pages)

My £2 bit of glass arrived today. I found it fits into a spare Cokin filter I have (no idea why I have it as I don't have any Cokin filters that fit it. The ones I do have are from 25 years ago...) I just need to buy an adaptor ring now. I'll probably go for 52mm and 58mm rings so I can use my old K series manual glass. It might be easier to maintain focusing that way (and they have depth of field scales)

All I need now is some sea/lake/river/something moving. I thought I might try "removing" people from a street scene...

K.

Try a football match with no players!

Just bought a set of step up rings covering from 49mm to 77mm and 77mm adaptor ring and filter holder. When they finally get here from China, I'll be able to use the glass on every lens I have except the Bigmos

Gareth, I found the glare was from the eyepiece. Black that out and all OK

Bernard

Sorry I didn't explain it very well Gareth, but looks like you've got there in the end

I've just had a very quick play with my new expensive gold plated welding glass.
(According to the Flickr group the gold ones give a better colour cast)
The £5 investment seems worth it as this shot of the sun (through a shade 13) has been done on auto white balance, and the only PP has been a crop.




1/500s F16 200ISO

I'm convinced the spots on this one are sun spots not the muck on my sensor, as they are in a consistent location on 3 images all on different parts of the sensor. (The other two both show sensor muck so I really MUST get my sensor cleaned!!!)

I think the colour cast is much better than I got with the Green glass, but still in need of treatment.

I've now got a gold one too. Waiting for my 77mm adaptor ring to tape it to

You might also like to try the metallised polythene, often used for emergency blankets.
That's what was being used to observe the sun during a recent eclipse. I was able to view the eclipse but it never occured to me to use it over a lens

Bernard

Gareth,
Could the red lines be from the red electricians tape you used? (I use 2 laps of black tape)

I have had faint bright streaks in older ones of mine (when used for their original purpose) at this stage I would go and get another and scrap the faulty one (prefer my eyes uncooked)

By the way (if I'm not advising you something you already know)
Buck & Hickman (Tooltastic) have a depot :-
Neptune Point
Vanguard Way
Ocean Park
CF24 5PG

I always get my welding spares from the Burton depot

regards
Bernard

Forgot to ask.....

If yours is the same as mine, the gold coating is just one one side. Did you try it with that coating facing out, and also facing in. If so, did it make a difference?

cheers

I used it facing out only. When facing the sun I wan't as mech as possible reflected away before being absorbed by other factors. When I get round to mounting it so it doesn't have to be held I might try both ways...