pentaxuser
Member
Delta 3200 is designed to have lower contrast than normal. So while the ISO speed may be 1000, when you "push" it (under-expose it at EIs of 1600 or 3200 and over-develop it) the result may actually yield better mid-tone and highlight rendition than when it is used at its ISO speed.
It is this part of your quote that has reminded me about an important point about development which I found to be the case with DDX . The Ilford times are too short and it is worth developing for the time shown for the next speed i.e. if you have exposed at 1600 then develop for the time given for 3200.
I cannot state the above for other developers but I would think it is worth erring on the over-development side for most of the usual developers that are used for D3200.
I note that Ilford itself gives 6.5 mins for 1600 for Xtol stock which seems very short to me. I haven't got the conversion factor for 1+1 but unless the conversion factor in much greater than 100% i.e. doubling of time this still gives only 13 mins.
I have had success with the time listed by J Hick's in Unblinkingeye for Xtol at both 1250 and 1600 which converting for the increase in time for 68F v 75F results in about 19 mins and 21.5 mins for 1+1 for these two speeds. These time are over 3 times greater than Ilford's time for Xtol stock.
This all adds substance to increasing development times appreciably.
pentaxuser