I'm tired of throwing half used bottles of developer so I am looking into trying Rodinal as I know it has a long shelf life so I can shoot as I please and not worry about my developer. To give you background about what I shoot and prefer before I ask any questions I will say that I shoot mainly 35mm but do a little 120 usually Tri-x @400 in 35mm or shanghai @100 in 120 and I don't mind grain and like the "vintage" grain structure of Tri-x so I know that Rodinal showing the Tri-x's grain wont be a problem. I don't push often and if I do it may just be a stop. Lastly I do like to dabble and throw in some dollar store Memories or Samsung 200 iso c-41 film in my BW chems for a little experimentation. So my questions 1. Since it isa so hard for me to find online is this r09 stuff really the same? Foma Fomadon R09 Film Developer - 250ml (Similar to Agfa Rodinal) | Freestyle Photographic Supplies http://www.freestylephoto.biz/9721-Compard-R09-Spezial-film-Developer-125-ml-Agfa-Rodinal-Special?sc=24100 2. Any special advice a first time user of Rodinal? 3. Whats the difference other than dev times between a 1+50 ration and 1+100? That's really all I can think of at this point, thank you for any help.