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Author Topic: Reciprocity Failure with Ilford Delta 100  (Read 5133 times)

charles binns

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Reciprocity Failure with Ilford Delta 100
« on: May 10, 2012, 08:34:58 AM »
Does anyone have any experience of what adjustments I need to make for reciprocity failure with Delta 100?

Am hoping to take my Harman Titan out for a spin and I can't find anything useful/trustworthy on internet.  Is the table on the spec sheet reliable?

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LT

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #1 on: May 10, 2012, 08:55:55 AM »
the Ilford data sheet is fine as a guide, but not really accurate andonly covers exposures up to 30 seconds.

Luckily Photo Technique mag has done the testing for you



notice the difference between hp5+ and Delta 100 ... and the ilford chart gives the same adjustment curve for them both!

full article here: http://www.phototechmag.com/index.php/archive/reciprocity

hope that helps Charles.  
« Last Edit: May 10, 2012, 09:49:20 AM by Leon »
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charles binns

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #2 on: May 10, 2012, 10:10:35 AM »
Leon

Thank you.  That's really helpful.
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charles binns

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #3 on: May 10, 2012, 02:51:30 PM »
Took 6 negatives which are drying as we speak (expect for one which I carelessly ruined).  Leon's table was spot on as all the negatives look well exposed.

Will scan & post them shortly.
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Ken B: eyes, I just do eyes.

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #4 on: May 11, 2012, 12:51:31 PM »
I have just bought some Delta so this is timely to read, thanks guys.
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Randy B

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #5 on: May 11, 2012, 06:22:08 PM »
I know this is off topic since you asked specifically about Delta 100.  But unless you're already super familiar with and love that specific film you might want to consider Fuji Neopan 100 Acros.  I love it for pinholes and night shots because it doesn't need any adjustment for reciprocity failure until 2 minutes.  Makes it more fun to shoot since you don't have to think as much and consult a chart for every shot.  It also has the added bonus if being way cheaper than Ilford and Kodak BW (at least it is in the US).  But like I said, if you already shoot a ton of Delta 100 its probably best to stick with an emulsion you know and just learn its curve :)

Anyways, just thought I'd throw that in there for your consideration.
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charles binns

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Re: Reciprocity Failure with Ilford Delta 100
« Reply #6 on: May 12, 2012, 08:57:20 AM »
Randy

Thanks for your suggestion.  Actually I am not a big fan of Delta 100 at all!!  I much prefer either PanF or FP4+

The only reason I asked about Delta was because I wanted to try out my new Titan which comes with 10 sheets of Delta 100.  Usually I use PanF or some rolls of Adox CH25 ART that i have lying around for pinholes.

If I could buy Neopan in 5x4 sheets I would give it a go though. 
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