Filter Question

Greetings Friends,

I have found that a lot of money can be saved by consulting with this group
before spending money.

We had a star party here on the ranch this past Saturday. It was a
fantastic event...the experienced astronomer I invited as our "expert"
showed us the Veil Nebula through an OIII filter. At least he said it was
an OIII filter. The OIII filters I've seen online are green. This was a
Red Filter---at least I noticed a slight red cast to the stars. He kept
saying it was green...anyway. I was blown away with the view---the detail
was amazing. He put the filter on my eyepiece on my scope...so I know my
scope is capable.

So, to see nebluae well, what filter should I look for? I see OIII's, and
Nebula Filters and Other things!!!!

Can someone help clarify. My experience with filters is like everything. I
bought the basic set at Orion and have found them to be useless. (bye bye
$$$$) but then I see a special thing that I didn't know existed and WOW!!!!

Doink