Although I have been photographing for thirty years or so, I have only been developing my own film for a few months. Recently I have noticed a lot of my negatives seem to lack contrast. My usual method is to follow the film makers directions regarding agitation ie. for Ilford films agitate for the first minute and then ten seconds a minute thereafter and because I use Rodinal I follow Agfa's recommended development times for various film speeds. I always have developer, stop, fixer and rinse washes at exactly 68 degrees. I use Rodinal 1+50, Jessops Econostop stop bath at 1+4 and Jessops Econofix also at 1+4. Recently I have been using Ilford Rapid Fixer. With the same slightly 'muddy' results. However, after my recent foray into night photography and using a partial stand development technique I have noticed those negs have fantastic contrast. (developed for 15 minutes, agitated the first minute then 10 seconds a minute for six minutes then stood for eight minutes). So where am I going wrong with the other negs? Am I agitating too much or too little? Or could it be something else i am doing? (by agitation I mean tilting the tank at about a 60degree tilt in a circular rotation, put a desert spoon in a coffee mug and run its stem round the rim and you'll get the motion I mean) It is also a possibility the metering is off in my camera, but I have had the same muddy look (see attachment for what I mean by 'muddy') from my Praktica BX20, Olympus OM10 and Voigtlander Vito CLR, so I figure the problem must be somewhere in my developing technique.