JCH Streetpan 400 H+D Curve with Replenished XTOL for 17:30 at 24C in a JOBO

Film-Niko · May 28, 2020

grain elevator said:
I was wondering whether one could get even more of that out of it, but if the highlights continue to rise in density with development, it won't be possible the increase midtone contrast more and print straight, keeping the highlights. Or not without giving away the increased midtone contrast again by moving to softer gradation.

It is extremely difficult to get a less problematic, more lienar curve with that film. It is only possible with two measurements:
1) Exposing in the EI 40 to 100 range.
2) Using a developer which produce a strong linear curve, like DD-X or ADOX HR-DEV.

But using this film in that speed range rises the question: Why not use Delta 100, TMX, Acros II, CHS 100 II or HR-50 instead?
All these films give
- much better resolution
- much better sharpness
- much finer grain
- much better characteristic curves = better tonality.
And all these advantages mostly at much lower prices, too!!

There is really no reason to use this Street Pan film. It has only disadvantages. You are ripped off. Period.

Adrian Bacon · May 28, 2020

Film-Niko said:
I have tested this film quite intensively when it was introduced in 2016. My tests of the chararcteristic curve and my comparisons to my former Agfa Aviphot Pan 400 tests showed me immediately that this "new" film wasn't new at all, but just former Aviphot rests.

The extremely strong and problematic S-shape curve you have got is absolutely typical for this film type. Very difficult to handle.

It isn't perfectly clear because it is very old, long expired film, which has meanwhile a quite high base fog (and reduced real speed due to its age). Being at least 12 years old former Agfa ASP 400s = Aviphot Pan 400. A friend of mine worked in aerial photography professionally at that time: In 2008 Agfa informed their aerial customers that this film was coated that year the last time, and that the film is discontinued.
Bellamy Hunt (JCH) has unfortunately lots of criminal energy. He is cheating his customers for years.
Instead of delivering fresh film - as claimed by him - he has just taken some old, expired leftover film stock and sells it totally overpriced.
And selling this film as ISO 400/27° is another cheating. As others have correctly described here, this films has a real speed only in the 40 to 100 range, dependant on the devlopers in use.

When this film was introduced lots of very experienced photographers tested it. And realized that it was just repackaged old Aviphot Pan 400 / ASP 400s.
They published their results and were promptly attacked by Bellamy Hunt and his partner Vishal Soniji from camerafilmphoto. Both continued telling their stupid marketing lies.
In 2017 Mr Hunt published an article that he has for the first time in his life developed a BW film at home by himself. And that he is a complete rookie in processing films.
And the same guy has a year before bashed very experienced photographers with decades of experience in film processing - including evaluating films with densitometers testing the characteristic curves and real speeds. He has bashed them because they have told the truth about his film repackaging and cheating.
This demonstrates very clearly what an as.........le this guy is.
Lying at his customers and ripping them off is his business.

the purpose of this thread is not to make public attacks, so if you don’t mind, refrain from doing so. It’s best to keep in mind that any problems you may have may or may not be a problem for other people. Just because the characteristic curve doesn’t match up with what you consider usable doesn’t mean somebody else won’t find a use for it.

Film-Niko · May 28, 2020

I have only reported my test results.
And my experience and opinion on the circumstances of this film.
That is what a forum is for.

Adrian Bacon · May 28, 2020

Film-Niko said:
I have only reported my test results.
And my experience and opinion on the circumstances of this film.
That is what a forum is for.

again, publicly throwing somebody under the bus is not welcome here. You say you extensively tested this film. OK. Post that information, or post a link to it so that others can look at it and make their own evaluation.I posted the information I have so that others can make an informed decision based on the emulsion itself. Whether the film itself is useful to others is up for them to decide. Not me, and not you. How you feel about Mr. Hunt and Co. or how this film should be used is pretty irrelevant.

Film-Niko · May 28, 2020

I can give you my sensitometric values if you want. No problem at all. They are very much in-line with yours, by the way. Will come in the next days, when I am back at home. Currently I am on a business travel.

Maybe some of my information about the circumstances and background of this film may not interest you. But I know from my long time here on photrio it is of interest for most of the other members.
And all members and passionate film photographers have the right to get the whole truth about the films offered to them.
That is one of the big strengths of photrio: Independent and critical expert knowledge. And not the permanent marketing misinformation which is presented on other internet sources.

Adrian Bacon · May 28, 2020

Film-Niko said:
Maybe some of my information about the circumstances and background of this film may not interest you. But I know from my long time here on photrio it is of interest for most of the other members.
And all members and passionate film photographers have the right to get the whole truth about the films offered to them.
That is one of the big strengths of photrio: Independent and critical expert knowledge. And not the permanent marketing misinformation which is presented on other internet sources.

it is possible to convey your experience without going on the attack. The reason why I even responded is because I was recently private messaged about this emulsion with a pretty scathing attack, and a significant part of your original post on this thread is pretty close to a copy/paste of a pretty significant part of what I was PMed, which raises a whole lotta questions for me in terms of motivation, therefore, if you can, keep it simple, keep it objective.

MattKing · May 28, 2020

Film-Niko said:
I have only reported my test results.
And my experience and opinion on the circumstances of this film.
That is what a forum is for.

Start your own thread, with the information you wish to share.
If you want, link to it in this thread.

JCH Streetpan 400 H+D Curve with Replenished XTOL for 17:30 at 24C in a JOBO

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