r/QualityPhotos - Professionals, intermediates, and beginners are encourage share their best work. r/PictureChallenge - Weekly topic/category of pictures r/PhonePics - Pictures taken from cell phones r/PhotoCritique - Post a picture and receive constructive criticism/advice for improvement r/GuessMyFirstName - Redditors share self portraits, you guess their name! r/ITookaPicture - Give and receive feedback r/PicRequests - Requests and assistance for photo editing r/PostProcessing - Noise reduction, sharpening, exposure blending, image retouching etc. r/Gimp (Free Download Here) - A free image manipulation program r/Shutterbug - Lighthearted/fun subreddit for discussing photography culture and practice r/Photography - The main hub of all things photography related r/PhotoClass - Into to Photography Reddit style, w/29 lessons r/AskPhotography - Ask anything here! Friendly/Supportive & Beginners Welcome! r/PhotoEssay - photography essays and slideshows r/PhotoJournalism - Stories by and about photojournalists, the photography industry, and discussions of photojournalist practices r/FashionPhotography - Photographers, styles, techniques

Diana, Holga, Superheadz, Harinezumi, Keychain cams, plastic lenses r/To圜ameras - Lomography, experimental, light leaks. This site rates sensors depending on a camera's S/N ratio and charts performance at each ISO setting, pointing out unacceptable level of noise, measured in decibels. DXOMark - How to find out which camera has the best S/N ratio depending on the ISO setting.

Flickr images