Newbie Needs help on B&W film developing...

[macmaster77]

Your under exposure was most likely caused by not adding in the filter factor to your exposure settings. Using an orange usually needs two more stops exposure(or there about depending on filter) check the filter factor number on the filter ring for this. It may read x4 (2x2=4), which is two stops. Red filters usually read x8 which is three stops(2x2x2=8).

I appreciate you taking the time to respond. You are correct, I used the Reprocity Timer app on the phone and it told me to slow the shutter speed down by two stops, which I did when I had the orange filter on. Thanks!

[jnantz]

I don't have a reducing back for my camera yet. I figure it's the cost of learning. I find black and white isn't expensive compared to what some are paying for color. Stearman Press is working on a tank for 8x10 that I'm going to give a go once they have it completed. Thanks.

i suppose you are right.
goodluck !
john

[Leigh]

I used the Re[ci]procity Timer app on the phone and it told me to slow the shutter speed down by two stops, which I did when I had the orange filter on.

Filter factor and reciprocity failure are two different and unrelated subjects.

Reciprocity failure applies to slow shutter speeds, usually only 1 second and slower.

Filter factor has to do with the optical attenuation introduced by using the filter. It applies at all shutter speeds.

In some cases applying a filter factor to shutter speed may slow it down to the point that you must also apply reciprocity correction.

- Leigh