Henning Serger
Member
- Joined
- Aug 31, 2006
- Messages
- 2,188
- Format
- Multi Format
Hello dear BW film shooters,
as promised some time ago (sorry for the delay), and on request of several photrio members, here finally my detailed test report about the new Acros II. It is based on a detailed test report I have published in the German film photography print magazine PhotoKlassik in last winter.
When Acros II was introduced in Japan last November, I immediately ordered lots of it in 135 and 120 in Japan.
After the shipment arrived I started intensive testing, including Acros I vs. Acros II comparisons.
I did my scientific standard film tests in my photography test lab. And I did several shootings of different subjects, too.
The test results are very positive:
a) Acros II has absolutely nothing to do with any Kentmere / Ilford film! All these weird conspiracy theories about Acros II being just another repackaged Harman technology / Ilford Photo film (because of the "Made in UK" on the boxes) are completely wrong and have absolutely nothing to do with reality.
b) Acros II has exactly the same outstanding reciprocity characteristic as Acros I. I have tested it. It is also documented in the data sheet of Acros II, and the data sheet is absolutely right.
That is extremely important because no other BW film has this unique and outstanding characteristic.
And in colour only Fujichrome Provia 100F has that wonderful feature.
c) The excellent detail rendition of Acros I is also given by Acros II: Resolution, sharpness and fineness of grain are identical. Both films have identical MTF curves and identical RMS value. I checked it with my sophisticated resolution, sharpness and grain tests in my test lab, and both films are again identical. Data sheet is correct. Great news again.
d) There are some very small and negligible differences in spectral sensitivity, and a small difference concerning the characteristic curve in the highlights (with some developers).
Spectral sensitivity:
Acros II is a little bit less orthopanchromatic than Acros I. Therefore reds are recorded a little bit lighter with Acros II compared to Acros I. But the difference is so small that most users will probably don't see it.
Shape of the characteristic curve:
Fujifilm has explained - and it is also visible in the published characteristic curve in the data sheet - that there is steeper contrast and tone separation in the highlights (Zone VIII to X). More of an "upswing", disproportionate shape of the cc with more dense highlights.
Form my tests I can confirm that it is there - with standard agitation and developers, which produce a straight, linear cc (like DD-X, T-Max Dev, Tetenal Ultrafin T-Plus etc.).
Personally I don't want these more dense highlights. I prefer a linear shape of the curve, or often also a curve which is a bit flattened in Zone IX and X (semi-compensating development with a bit more highlight detail).
Good news for all those photographers which have the same preference like me
: Both a linear curve (without "upswing" in the highlights) and a semi-compensating (or even full compensating) curve are also possible with Acros II:
- either use less agitation (e.g. 1x per minute)
- or use a (semi-)compensating developer like ADOX FX-39 II (my preferred developer for Acros) or ADOX Rodinal in 1+75 (1+100) dilution, or D-76 in 1+1 or 1+2
- or combine less agitation with a (semi)compensating developer.
Result: You can create the characteristic curve you want / need with Acros II. It is just a matter of the right developer and right agitation for your preferred curve shape.
Best regards,
Henning
as promised some time ago (sorry for the delay), and on request of several photrio members, here finally my detailed test report about the new Acros II. It is based on a detailed test report I have published in the German film photography print magazine PhotoKlassik in last winter.
When Acros II was introduced in Japan last November, I immediately ordered lots of it in 135 and 120 in Japan.
After the shipment arrived I started intensive testing, including Acros I vs. Acros II comparisons.
I did my scientific standard film tests in my photography test lab. And I did several shootings of different subjects, too.
The test results are very positive:
a) Acros II has absolutely nothing to do with any Kentmere / Ilford film! All these weird conspiracy theories about Acros II being just another repackaged Harman technology / Ilford Photo film (because of the "Made in UK" on the boxes) are completely wrong and have absolutely nothing to do with reality.
b) Acros II has exactly the same outstanding reciprocity characteristic as Acros I. I have tested it. It is also documented in the data sheet of Acros II, and the data sheet is absolutely right.
That is extremely important because no other BW film has this unique and outstanding characteristic.
And in colour only Fujichrome Provia 100F has that wonderful feature.
c) The excellent detail rendition of Acros I is also given by Acros II: Resolution, sharpness and fineness of grain are identical. Both films have identical MTF curves and identical RMS value. I checked it with my sophisticated resolution, sharpness and grain tests in my test lab, and both films are again identical. Data sheet is correct. Great news again.
d) There are some very small and negligible differences in spectral sensitivity, and a small difference concerning the characteristic curve in the highlights (with some developers).
Spectral sensitivity:
Acros II is a little bit less orthopanchromatic than Acros I. Therefore reds are recorded a little bit lighter with Acros II compared to Acros I. But the difference is so small that most users will probably don't see it.
Shape of the characteristic curve:
Fujifilm has explained - and it is also visible in the published characteristic curve in the data sheet - that there is steeper contrast and tone separation in the highlights (Zone VIII to X). More of an "upswing", disproportionate shape of the cc with more dense highlights.
Form my tests I can confirm that it is there - with standard agitation and developers, which produce a straight, linear cc (like DD-X, T-Max Dev, Tetenal Ultrafin T-Plus etc.).
Personally I don't want these more dense highlights. I prefer a linear shape of the curve, or often also a curve which is a bit flattened in Zone IX and X (semi-compensating development with a bit more highlight detail).
Good news for all those photographers which have the same preference like me

- either use less agitation (e.g. 1x per minute)
- or use a (semi-)compensating developer like ADOX FX-39 II (my preferred developer for Acros) or ADOX Rodinal in 1+75 (1+100) dilution, or D-76 in 1+1 or 1+2
- or combine less agitation with a (semi)compensating developer.
Result: You can create the characteristic curve you want / need with Acros II. It is just a matter of the right developer and right agitation for your preferred curve shape.
Best regards,
Henning