Welding glass help - light leak?

^Joe

^Joe

Messages
2,808
Name
Joe
Edit My Images
Yes
I spent £1.50 of my hard earned money on a shade 10 welding glass, and looks as though it's a 14 stopper.

I have it in a filter holder (nearest to the lens), on my tamron 17-50 2.8.

Took a quick shot to calculate the stoppage.

img_21.jpg


I know It needs a good clean, but why are these rings happening at the bottom? Is it light leak?

If so - how do I correct?

Cheers
Joe
 
It looks like it's the reflection of the rings around the front of the lens. I had the same when shooting through a window. Not sure how to cure it though.
 
I put black electrical tape all around the edges (and back) of the glass and holder which helped. Also use the eyepiece cover.

I need to clean some blotches from mine though- any ideas of what fluid to use?
 
I am going to use some citrus degreaser to clean the glass.

So you basically taped the entire side of the glass/filter holder to stop the light leak?

Could I maybe get another filter adapter, and super glue the glass to the adapter and then screw it onto the lens..?
 
i just use a couple of elastic bands to hold the glass flush against the rim of the lens and all is well. Just sand the edges down first so you dont snap the bands every use.

What you might also find , depending on the position of the sun, is light leaking in through the eyepeice on long exposures. So that might be worth covering too.
 
Last edited:
^Joe said:
I hadn't thought of covering the eye piece. Will certainly do that from now on.

I think the idea of gluing the filter to an adapter is a reasonable idea ...?!

Thanks for the replies
Click to expand...

BluTack :thumbs: And you absolutely must cover the viewfinder.
 
yup, just blutak it to an old UV filter or similar, easy enough to get your focus/exposure set then screw on the filter when you're ready to go. Had mine stuck to the same filter for over a year now working great :)
 
HoppyUK said:
BluTack :thumbs: And you absolutely must cover the viewfinder.
Click to expand...

:thumbs:Yup thats what i do and i get no light leaks what so ever, and the good thing about blutack over superglue is that you can remove the glass and us it on other size lenses, if also found that the chemicals in superglue destroy the surface of the welding glass so you get a sheen that is impossible to remove, so you loose the glass and the mount you are using
 
Even with no light leak you can sometimes get this on long exposures (5 mins plus), dependant on light position and kit used.
 
I got a cheapo cokin P filter holder off fleabay, I had to widen the gaps to take the glass, but I used some self adhesive black foam underlay stuck to the holder so when the glass slides in it fits snugly.
One thing I have noticed is light leaking through the edges and bouncing down the glass, so I painted coloured nail varnish around the edges.

Then after doing all that I bought what I though was an cheap ND32 screw in filter ( 5 stops ) from amazon, that turns out to actually be a 10 stop and works really well.

and one of these days I'll actually remember to take it and the tripod on the same trip !
 
You must log in or register to reply here.
Back
Top