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Acros 100 Exposed at ISO 320 - Recoverable?


Keith (M)

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Have only had my R5 a short while and have been using Neopan 400, which I expose at ISO 320.  My other 35mm film cameras (M7 & MP) both have DX-readers, and yes, when I loaded Acros 100 into the R5 this morning, I clean forgot to reset the ISO dial.  I had taken 16 frames, mostly of sunlit landscapes before realising.  

 

I see that Massive Dev chart gives development of Acros 100 @ ISO 400 in Rodinal 1+25 for 7mins 45secs.  (Due to my development sessions being up to four months apart because of being out of the country, I only use Rodinal).

 

Question - do I carry on exposing the remaining twenty frames at ISO 320 and develop as above or reset the camera to ISO 100, develop as normal and potentially kiss goodbye to the sixteeen?

Edited by Keith (M)
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Why not take the film out, push-develop the 16 shots at a little less than 7:45, and start a fresh roll? I you do not want to do that, I would finish the roll at 320.
Else, I guess, you may want to google stand-development, since you are using Rodinal .

Edited by Peter_S
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Since when does the MP have a DX reader?... news to me if it does. Anyway, finish the roll at the same ISO and make the appropriate adjustments per Massive Dev. Your photos will be a bit grainier, but that's all.

Edited by Soden
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Brain fade (again) The MP's dial is a much more obvious reminder to set ISO after closing the back.

I almost wish the M7 didn't have one, as the push/pull is counter intuitive.

 

But back to topic... I shoot tri-x at 1600 frequently, for (cough cough) effect. Give it a try, finish the roll and adjust in development... you might like it... or not.

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  • 2 months later...

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Well, I finished off the film at ISO 100 in late August in the little village of Navajas in Valenciana.  Arrived back from Spain a week ago and developed it today, choosing to use stand-development of 1 hour & Rodinal 5:100.  And the result s are...

 

1) Exposed at ISO 320

38111601962_9afaafd39c_b.jpg

 

2) Exposed at ISO 100

38143360131_caac8a5718_b.jpg

 

So Rodinal & stand-development came to the rescue  :)

Edited by Keith (M)
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Good choice. Rodinal 1:100 (and "stand development") will maximize that developer's "compensating effect" and scrounge out every last bit of exposed silver in the shadows, without cooking the highlights.

 

Outside of some "bald spots" in the black shadows under the trees, the overall tonality seems fine

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