Getting involved in the sin of photography

Q: Given that taking a photo of a person is prohibited, and so is looking at the opposite gender, which of the two options below would be a lighter sin:

1. A mahram taking the photo and thus avoiding the sin of going to a non-mahram to take a photo, but the mahram is now doing a prohibited thing (i.e. taking the photo).

2. Going to a professional photo studio where the photo will be taken by a non-mahram. In this situation the mahram avoids the sin of taking the picture, but this causes an interaction between non-mahram individuals.

Which of the two is the better option?

Taking part in a 'haldi ceremony'

Q: I have a question regarding the haldi ceremony. I have learnt that this haldi ceremony is a religious ceremony of Hindus. However, many Muslims in our country celebrate this haldi ceremony before a wedding. As far as I know, this is a grave sin and this is imitating the kuffar, but does it take one out of the fold of Islam?