Shooting Ilford Delta and developed as iso 400

[PatrickMarq]

At this time I only have Delta 100 and I would like to do some portraits but the exposure times are a bit long.
So I was thinking to exposure for iso 400, but I don’t know how to adapt the develop time.

I develop in Ilford DD-X

Patrick

[GoodOldNorm]

http://www.darkroomdave.com/tutorial...and-delta-400/

[Pere Casals]

So I was thinking to exposure for iso 400, but I don’t know how to adapt the develop time.

You can't expose D100 at ISO 400, D100 won't deliver that ISO speed, you may shot it EI 400 with a 2 stops loss of shadow detail, at least you will loss 1.5 stops in the shadows if you are able to increase true speed by 0.5 stops.

You may overdevelop to make the film toe more printable, here you have the table: https://www.digitaltruth.com/devchar...=C&TimeUnits=D

...but I would not waste film in that way, as it is D100 and shooting it EI 400 will degradate image quality in the shadows. If your scene don't have shadows then EI 200 my be acceptable, but at EI 400 you won't be able to avoid a pushed look, if you want that look then it's another thing.

[Drew Wiley]

Indeed. Unless the lighting is very flat, the portrait would come out quite harsh due to losing at least two entire zones of shadow gradation to sheer blackness. I state, "at least" two zones because I don't regard Delta 100 as even a true 100 speed film for crisp shadow separation, but more like half that speed.

[PatrickMarq]

So it seems I have to wait until my HP5 plus 400 arrives.
Getting quite frustrated over here. Missing a lens, wrong bellow lengths, wrong film....

I’m used to shoot landscapes and architecture and now when confined at home, I’m out of my conform zone.

[GoodOldNorm]

So it seems I have to wait until my HP5 plus 400 arrives.
Getting quite frustrated over here. Missing a lens, wrong bellow lengths, wrong film....

I’m used to shoot landscapes and architecture and now when confined at home, I’m out of my conform zone.

Buy some Delta 400.
Shoot Delta 400 at EI500 develop in DDX

[Pere Casals]

wrong film....

Wrong film ? Why ?

D100 is excellent, don't complain because my dry plates are ISO 6


Use a longer exposure or an strobe, or be creative by finding unconventional illumination sources. Most powerful recent LF portraiture has ben made with TXP at ISO 80.

[MAubrey]

You could use a compensating developer like Diafine. Typically you increase the EI by ~2 stop with that.

[Drew Wiley]

You can't "compensate" into existence what isn't even on the film to begin with! Compensation might or might not rein in the highlights. It won't do a darn thing for gross underexposure except muddy up what's left of the upper tones.

[Pere Casals]

You could use a compensating developer like Diafine. Typically you increase the EI by ~2 stop with that.

But you won't gain a 1 stop real speed increase...