Agfaphoto APX 100 - is it Kentmere 100, or modified Kentmere 100?

[Don_ih]

Harman is free to change their minds about what they do at any time without informing or consulting anyone.

 

[albireo]

To avoid any confusion. I'm asking about the product below.

Has anyone shot Kentmere 100 and this product in the image, side by side, and found any differences at all?

The internet consensus is that they are the same emulsion.

Has someone compared them and found if anything else is noticeably different?

I'm particularly interested in any differences regarding support/halation.

 

[xkaes]

I still have a small stash of original Agfapan 25.

Comrades in arms!!!

 

[GregY]

Comrades in arms!!!

& some 120....

 

[MattKing]

Thanks for clarifying the differences between the heritage of the old Agfapan APX 25 and the current film that is the subject of this thread - Agfaphoto APX 100.

 

[GregY]

Thanks for clarifying the differences between the heritage of the old Agfapan APX 25 and the current film that is the subject of this thread - Agfaphoto APX 100.

Pretty much a sideline illustration to xkaes comment...... not unlike your bringing up digital in a question in the analog sub forum......

 

[MattKing]

Pretty much a sideline illustration to xkaes comment...... not unlike your bringing up digital in a question in the analog sub forum......

And a helpful one too!

 

[xkaes]

And let's not forget AGFAPAN 400, too. They were all great (ISO 25, 100, & 400). Yesterday I defrosted some Agfapan 400 to take some 4x5" portraits of relatives who happen to be in town. The three Agfa B&W films changed their labels over the years (ex., Agfapan 25 vs Agfa APX 25) but I never noticed any difference.

 

[npl]

OP if you havent found that video yet :

Althought the choice of the photographed scene doesn't answer your question about difference in halation much

 

[Henning Serger]

It seems clear that Agfaphoto APX 100 is based on Kentmere 100, made in the UK etc. I don't want to go over this again here.

What I'd like to know is if Agfaphoto APX 100 is EXACTLY Kentmere 100, or if it is a film based on Kentmere 100, but 'tweaked' according to custom specs by Lupus Imaging.

Discuss, if possible supporting your argument with first hand experiences.

AgfaPhoto APX 100 is Kentmere 100, and AgfaPhoto APX 400 is Kentmere 400.
I tested it in my photo test lab under scientific test conditions, the results were identical. The tiny differences which are reported sometimes are due to batch variations. You always have certain tiny to small batch variations in film and photo paper production. The manufacturers operate with an interval for quality parameters, in which these variances are considered as acceptable and not relevant (too small to have negative visible effects) for the usage.
And when a manufacturer is producing a product both for their own brand, and a different house brand, it is extremely likely that those batches which differ a bit more from the perfect quality parameters, but are still in the limits of the quality interval, are given to the house brand customer. And the more "perfect" batches are used for the own brand.

When Lupus Imaging (the company who offers the AgfaPhoto films) started with this film line (at the time when their former stock of original Agfa Leverkusen APX 100 and 400 were sold out), they asked film developer manufacturers to evaluate / test the new films in their developers and publish the developing data.
One developer manufacturer asked then me to support them with these detailed tests, because they had personal bottlenecks at that time. So they shipped developers and films for testing to me. And the films they send me was Kentmere 100 and 400, because Lupus was completely transparent about that fact.
I hope my answer is helpful for you.

Best regards,
Henning

 

[albireo]

AgfaPhoto APX 100 is Kentmere 100, and AgfaPhoto APX 400 is Kentmere 400.
I tested it in my photo test lab under scientific test conditions, the results were identical. The tiny differences which are reported sometimes are due to batch variations. You always have certain tiny to small batch variations in film and photo paper production. The manufacturers operate with an interval for quality parameters, in which these variances are considered as acceptable and not relevant (too small to have negative visible effects) for the usage.
And when a manufacturer is producing a product both for their own brand, and a different house brand, it is extremely likely that those batches which differ a bit more from the perfect quality parameters, but are still in the limits of the quality interval, are given to the house brand customer. And the more "perfect" batches are used for the own brand.

When Lupus Imaging (the company who offers the AgfaPhoto films) started with this film line (at the time when their former stock of original Agfa Leverkusen APX 100 and 400 were sold out), they asked film developer manufacturers to evaluate / test the new films in their developers and publish the developing data.
One developer manufacturer asked then me to support them with these detailed tests, because they had personal bottlenecks at that time. So they shipped developers and films for testing to me. And the films they send me was Kentmere 100 and 400, because Lupus was completely transparent about that fact.
I hope my answer is helpful for you.

Best regards,
Henning

It is, thank you @Henning Serger!