Most of my photography is film based. I don’t have a darkroom or enlarger and ‘digitise ‘ my 35 mm, medium format and 5x4 negatives either by film scanning or photographing negatives with a macro lens on a digital camera, then processing these digital files via Lightroom and Photoshop.
I am keen to arrive at an optimum film speed and development time for any particular combination of film and developing agent.
I don’t have a densitometer.
Is there any technique available to me to achieve my objective in the absence of darkroom facilities?