I need some help with a film I shot at the wrong ISO. The film in question is Ilford HP5 and the ISO is 400. Trouble was that I had already shot off a colour reel at 200 and I thought I changed it (sorry I didn't mention that I am using a Nikon FM2) but half way through the shoot I noticed it was still on 200.
Normally, I would say c'est la vie and put it down to experience but I know that there are some decent pics on this reel and I know I can rescue the film.
I will be using Ilfotec LC29 developer but I am not sure how I can pull the film back. Any offers of help would be much appreciated and hopefully will lead me to post some pics that I have developed. By the way I am new to this game and I have just started my last course in a City and Guilds program and I really want to do really well. I love this site and all the ideas and help other users give each other.
No problem. Just develop as usual - one stop extra exposure is gong to have little effect in B&W - should give you slightly better shadow detail if anything. Many people will rate HP5+ at ISO 200 all the time (I rate it at 320 FWIW).
As always with these things, YMMV, but I would just ignore the extra exposure and concentrate on suiting the development time to the contrast of the important scenes (erring on the short side).
If you pull it, you'l get lower contrast. I would just develop as normal unless there were scenes with extreme contrast. In that case I would probably expose it at 200 anyway, and use a compensating developer.
I always shoot HP5+ at 200ASA and develop as normal with no problems. I develop in Rodinal at 68 degrees with a dilution of 1+50 for 15 minutes agitating for the first minute and then agitating for 5 seconds every 30 seconds.Look in my gallery to see the results. (Snooowmaaan, The Leap, The Treasure Hunter, Pattern 4)
Don't sweat it...unless you've ever done a threshold exposure test with your camera and HP5...you may be a lot closer to the actual EI than you think...Do what everyone else suggests and dev it normally and pass those City & Guilds...whatever they are?!
I've always used HP5 at 200asa and get good results with D76. Most of the B&W films I've used benefit from a little overexposure and 1 stop over is very little really. I would develop as normal. Regards, BLIGHTY