[75dvtwin]

petapixel, flickr groups there is 500px (this is more image oriented)

100asa -- for more professional photographers, and

photrio.com for the film camera, and film-development crowd.

I do not like petapixel -- because they ask me to register with google or discuss not interested in any of those...

I am surprised that dpreview was owned by Amazon. Never knew about this.