I've downloaded presets for Lightroom and actions for Photoshop and tried many of them. Black and white is new to me and I don't have the eye to determine what is the most accurate conversion.
Can anyone that works in black and white make a recommendation as to which method, action, preset, etc.. gives the most accurate conversion, at least as a starting point to work from. Some seem like they add too much contrast or one channel is too high and they don't look like black and whites I see elsewhere.

