Help what's causing this funny light??

[yelsac]

Hi

Can anyone tell me why I've got this funny stray light on some of my subs??? I've got a great big dew shield on my scope which is pointed heavenward, most of my subs are ok but I have a few that have this strange shaped orange light at the top end of the picture. The only thing I could think of is maybe some light is getting in via the DSLR itself. Could this happen? Is it coming through the DSLR's viewfinder or something? If so any ideas how to stop it?

Sorry so many questions but after struggling for over an hour to sort a problem with setup I was pulling my hair out anyway & then this GGGRRRrrrr!

[Nigel G]

Not sure, Is the light in the exact same place everytime,  light can leak through a dslr but I think for this amount you would notice the light source,  

It looks a bit like  sodium light.

[yelsac]

Yes I think my son put a light on! but its not a massively bright light so shouldn't effect the setup except I noticed the DSLR was pointing back towards the house!

I was just wondering if anyone else had experienced this & if indeed its the DSLR's viewfinder causing it

[Alien 13]

Light does get in through the viewfinder which is why Canon supply a small rubber cover (located on the camera strap) to prevent this.

Alan

[yelsac]

Yes found it Brilliant

many thanks