Today I put on a Hoya HMC filter on my Nikon 50mm f1.8 and took a pic of my mom cooking in the kitchen, behind her are the windows. The kitchen is quite dimly lite.
I immediately saw the greenish blue flare in the shape of my window grills on the picture.
Curious, I tried it with two other lens, a Nikon 18-135 and a Sigma 30mm, both with the same HMC filter on but no problems.
Then I notice the lens of the 50mm 1.8 is actually deeply set in so there is about one inch distance between lens and filter.
Is it something like the longer the distance of your lense to your filter, the higher the chance of ghosting?
Thanx in advance for any help.