The HP5 Plus 100 ASA Experiment: A Happy Accident?


Hello lovely people.

I’m a bloody fool. I made the stupidest of mistakes when shooting HP5 Plus 400 speed film at ISO 100.

I’d been intending to use 100 ASA film in my Nikon FE, so in preparation, I had set my camera’s ISO dial to 100. I loaded the HP5 and forgot to change this blasted setting. By the time I realised, I had already taken “some” photos. I didn’t want to wind the film on to change the setting because the sun was shining and I didn’t want to waste the light.

In for a penny, in for a pound. I thought, “What the heck?” They say you have all this “latitude” with film, so I went online to find out if I could salvage the roll. Here we go for a walk in the Parc Garenne Lemot in Clisson.

I developed the film in Ilfosil 3 (1:9) and used the development times for Kentmere 100, praying that I would have something usable…

ParameterDetails
FilmIlford HP5 Plus 400
ExposureRated at ISO 100 (2 stops overexposed)
DeveloperIlfosol 3 at 1:9
Development Time5 minutes 30 seconds (using Kentmere 100 time)
ResultLower contrast, smooth tonal transitions, fine-looking grain, excellent shadow detail
CameraNikon FE
LocationParc de la Garenne Lemot, Clisson

THE STATUE – Front view of classical statue on pedestalThis shot demonstrates the beautiful tonal range achieved through pull processing

The Theory: Pulling Two Stops

For those who aren’t deep in the film weeds, here is what I actually did. By setting my camera to 100 ISO while using 400 speed film, I was overexposing by two stops.

Now, common wisdom says that pulling HP5 to 200 ASA (one stop) is perfectly fine. But I thought I was pushing my luck pulling it two stops to 100 ASA. I thought I was taking the mickey with the film gods.

By giving it extra light and less development (pull processing), I was essentially asking the film to reduce contrast and grain significantly. I was testing just how much abuse it could take before the negatives turned into flat, grey mush.

I didn’t develop it for standard HP5 400 times. I treated the whole roll as if it were 100 ISO film from start to finish.

The Results

When I scanned the negatives, I was genuinely surprised. The negatives were dense, but not unmanageable. The scanner handled them well. Here is what the process actually looked like in practice.

1. Rich Shadow Detail

The first thing you notice is the lack of “muddy” shadows. Usually, HP5 can get a bit grainy in the dark areas. Here, the shadows under the pergola and the fence are deep, but they still hold detail.

FENCE WITH LONG SHADOWS – Diagonal shadows cast across gravel pathNotice how the deep shadows still retain texture and detail in the gravel

2. Texture and Grain

This is the real winner for me. Look at the texture on the wood in these shots. Because I gave the film extra light and reduced the development, the grain structure is much finer than usual. It looks almost like a slower film (like Delta 100) in the mid-tones.

WEATHERED WOODEN POST – Close-up showing wood grain and textureThe fine grain structure is clearly visible in the wood texture

3. Highlight Control

I was worried the bright spring sun would blow out the sky. Looking at these branches against the sky, you can see a beautiful grey gradient rather than a blown-out white. The reduced development time really helped keep those highlights in check, even with the two-stop overexposure.

BARE TREE BRANCHES AGAINST SKY – Intricate branch pattern with grey skyThis is the proof – the sky retains beautiful tonal gradation despite overexposure

4. Tonal Range

From the white marble of the statues to the dark foliage, the tonal separation is superb. The process gave me a creamy, classical look that I might not have achieved at box speed.

ORNATE URN WITH STATUE IN BACKGROUND – Layered compositionForeground and background detail with smooth tonal transitions
CLASSICAL COLONNADE – Stone pillars with cloudy skyWeathered stone texture and cloud detail demonstrate the technique’s versatility

The Verdict

So, was this a disaster? Absolutely not.

In fact, I was pleasantly surprised. Because I gave the film so much light and reduced the development, the shadow detail is incredibly rich and the highlights are held back. There is virtually no grain in the dark areas. The contrast is lower than standard HP5, which gives it a very smooth, almost medium-format look.

Ornate scrollwork detailRazor-sharp detail and micro-contrast prove no sharpness was lost

It turns out, what I thought was a stupid mistake is actually a technique some photographers use on purpose! Pull processing HP5 (rating it at 100 or 200 ISO and developing accordingly) is known to produce finer grain and lower contrast. I thought I was pushing my luck going two stops, but the film handled it like a champion.

Would I Do It Again?

Would I deliberately shoot HP5 400 at 100 ASA again? No, probably not. If I want 100 ASA film, I’ll just use 100 ASA film. It’s cheaper and more straightforward.

But it’s damned good to know that at a push (sorry, pull), it could work. If you’re ever in a situation where you’ve loaded the wrong film, or you’re caught out by changing light conditions, HP5 Plus can take the abuse.

Have you ever accidentally shot film at the wrong ISO? Did you save the roll or bin it? Let me know in the comments below.

Happy shooting

Ian from IJM Photography

Post Scriptum:

Waiting for the Light: Reclaiming the Cathedral with Ilford HP5+


I didn’t set foot in the cathedral while Voyage en hiver draped its silence in municipal spectacle. Not out of protest—I simply couldn’t bear to see sacred space turned into a backdrop. So I waited. And when the banners finally came down in December, I loaded a roll of Ilford HP5 into my Nikon FE and walked back in—not as a tourist, not as a patient, but as someone hoping to find the light exactly where I’d left it.

I’ve always abhorred political recuperation. The Voyage en Hiver had no place in the cathedral’s reopening. This was about worship. About returning to God in a space that had been quiet for too long—not about municipal branding or winter tourism. “Give unto Caesar what belongs to Caesar, and unto God what belongs to God.”  (Matthew 22:21)

That day, I chose God’s silence over their spectacle.

My hands were cold when I raised the camera. December light in a stone cathedral is a quiet thing—more absence than presence. I wondered, honestly, if 400 ASA would be enough. But I wanted authenticity: more grain than digital noise, more truth than polish. So I trusted the FE’s metering, opened up my aperture, and let the film do what it does best. No second-guessing. No LCD screen.  Just the click of the shutter and the hope that the light would hold.

And it did.

The frames that emerged are darker than summer would allow—but this was December, after all. And in that darkness, something gentle remains: the grain cradling the texture of worn wooden pews, shadows tracing the ribs of vaulted stone, candlelight bleeding softly into halos where no banner now hangs. Black and white stripped away every distraction—the logos, the seasonal clutter, the noise—until only what mattered remained: light on stone, silence between pillars, the architecture of reverence.

One frame in particular stays with me: the candles. Shot at 1/30s, my hands unsteady not from illness but from the simple weight of the moment. The focus slipped slightly. The flames blurred into one another. And instead of frustration, I felt a quiet relief—the film hadn’t captured perfection. It had captured presence. Grain became breath. Blur became prayer.

I didn’t go to “get out of the house.” I went because the space was clean again—just stone, silence, and the stubborn glow of candlelight. And for a few minutes, with the FE cold against my palm and the smell of incense in the air, I remembered why I love film photography: it doesn’t lie. It holds what’s there—shadows and all—and asks only that you trust the process.

They sold a spectacle. I took back the light. And the grain—warm, imperfect, alive—proved which one will last.  My small act of reparation…

Never Complain, Never Explain


Content Note: This post discusses depression and emotional exhaustion. Please read with care.

That was the old Royal Family rule—stoic, impenetrable, forever above it all.

I, alas, am not royalty. I’m an overthinker with a camera and a blog, and I owe you nothing… but I’d like to offer a little explanation anyway. Call it common courtesy. Or perhaps just the need to name what’s been happening.

So here’s the situation report from IJM Photography.

I haven’t written in a month for two reasons.
First: the season. If you’ve followed this space for a while, you know I’ve long wrestled with melancholy—especially as the days shorten. This year, it hit harder than usual. I made it through November, but only just. By December, I was physically and mentally exhausted.

Second: my health. After a conversation with my manager and HR, I was referred to the médecin du travail. She diagnosed me with dépression aiguë—acute depression (not the cute, Hello Kitty kind)—and noted a heart murmur. Frankly, I was relieved to have a name for what I’d been carrying.

She ordered me to go straight home—not back to work—and to see my GP the next day. She mentioned my brain chemistry was “in a bit of a mess.” Which, in its odd way, reminded me of three things:

  • — I have a brain
  • — I have a heart
  • — and I am profoundly tired

Not broken. Just worn thin.

I was referred to the local Centre Médico-Psychologique. There, I broke another unspoken rule: when the nurse asked how I was, I didn’t say, “Fine, thanks.” I told the truth—calmly, factually, without blame—about the weight I’d been under since returning to work after my accident, and how even the resilience I’d inherited from past generations suddenly felt out of reach.

To my surprise, a session with a psychiatrist opened up right away. He was kind, thoughtful. We talked about identity, belonging, and the quiet strain of straddling cultures. He said I carry “the mindset of an immigrant”—and that perhaps I’ve become more French than I realize. He suggested working on communication with my spouse, and that a trip back to the UK might help me reconnect with myself.

He might be right. If funds were no object, I’d book the ticket tomorrow.

For now, I’m taking things one day at a time. Resting. Recharging. And slowly returning—to my camera, to my words, to myself.

Thank you for waiting.

— IJM

The Opening of the Film Archives: An October Saturday in Town with Killian, 2016


Welcome back to another look at the film archives. This time, I’m sharing a few black-and-white street shots from an October Saturday in Nantes, likely taken with the Praktica MTL3 and HP5 Plus film. These outings with my son Killian, which we called ‘Ian and Killian days,’ became a cherished routine, a time for us to reconnect amidst the busyness of life.

He was 17 then, a weekly boarder at his lycée in La Roche sur Yon. On the weekends, we’d often head into Nantes, following the same familiar programme: a visit to the barbershop, a meal at the Sugar Blue café, and finally, a drink at the John Mc Byrne Irish Pub. In the photo, that handsome chap in the barber’s seat is Killian—a little reminder that it wasn’t always Kate joining me on these trips. These outings were a way to stay connected, despite his growing independence. Even with him being only 17, I still felt that sense of responsibility. Once a Dad, always a Dad.

As we went through our usual routine, I found myself facing the familiar challenge of capturing these moments on film. The low light inside the barbershop always made me second-guess whether I could get a decent shot without using a flash. But over time, I learned to trust the Praktica and the HP5 Plus film. There’s a rawness to film photography, especially with Ilford’s HP5. It adds a certain grit and texture to the image, something that digital just can’t replicate.

That’s what I love about film—the imperfections. The grain gives it character, a certain honesty that smooth, polished digital photos lack. It’s not about creating something flawless but about preserving the authenticity of the moment. This shot of Killian in the barbershop, for example, may not be technically perfect, but it’s real. It’s us, it’s Nantes, it’s one of those ‘Ian and Killian days.’

Looking back at these photos, I’m reminded that sometimes, it’s the imperfections that make an image truly memorable. Quite the day, right?

The Opening of the Film Archives—Clisson, September 2016


Welcome back, Dear Reader, to the film archives, still with the Canon AE1 and HP5 Plus from Ilford, but in Clisson this time.  You will remember Clisson from previous articles and will have seen the pictures, so it shouldn’t be a stranger to you.  Who knows, it could even feel like revisiting an old friend.  It certainly is for me. 

But why Clisson I hear you say.  Well, it’s not very far away from where I live.  It’s also one of those market towns that is renowned for the beauty of its architecture with an Italian slant.  It has the massive castle that towers above the river.  It has me taking photographs of it.  

Clisson, like most things, has options.  On a Friday the main option is the huge market, and wandering around the 14th-century Halles, which can keep you out of the sun, the rain, the heat or the cold, depending on the time of year.  I either go down to the river and wander along the river banks in the Garenne and Lemot park, or park at the top of town and stroll around the Halles and surrounding streets.  In the series of photos at the end, you will see some stone steps that join the two options, but I have dodgy knees, and those steps are like leg day at the gym.  You can avoid those steps by just following the road that wraps itself around the church, and going under the tree that just got tired and decided to rest on the house opposite.  

But this time I decided to break out of my habits and visit the Quartier St Jacques with its decommissioned chapel, and garden.  It’s yet another pretty place in a pretty town, and when I was sitting there in the sun, I felt that I didn’t have a care in the world.  Serenity flooded my mind and all was well with the world…

The Opening of the Film Archives – Noirmoutier September 2016


Welcome back, dear reader, to another delve into the Film Archive from before this wonderful blog that I know you enjoy reading so much. I appreciate being able to share these photos with you in the hope that they may not only please you but also offer insight into an older form of photography, one where concerns about overheating or battery life were minimal. I want to demonstrate how it is still possible to achieve great results with any camera and that the main quality in your photography comes from you, the photographer.

Earlier this year, I was there with my Canon 6D Mark II, but today, we’re revisiting my visit from September 2016. At that time, I didn’t have my Canon, but I did have the Olympus Trip 35 with HP5 Plus film from Ilford. I used that camera quite a lot that summer and continued to use it in September. I might just have to dig it out of my camera cupboard and use it again. Constraints and minimal kit often lead to more creative decisions—just think back to my UK trip, where I only had my X100F with me.

Let’s start with the camera. It’s a small but gorgeous camera designed for the mass market in the 1960s and was still being produced in the 1980s, which attests to its appeal among casual photographers. With relatively few controls, it’s pretty foolproof. I can adjust the film ASA setting, and the selenium cell housed with the lens takes care of the rest, whether it’s aperture or shutter speed. The famous red flag appears in the viewfinder when the camera senses insufficient light. All I need to do is set the focus zone.

I must have bought mine around 2015 or 2016, and it was quite affordable at the time—no more than 50€. It was an iconic camera then and still is today, but as the supply of these cameras dwindles, prices have increased. You can now expect to pay 100€ or more, with some models even reaching nearly 200€. It remains a great camera but might be a victim of its own success, along with sellers’ optimism and greed. Buyer beware—shop around, and you might still find more accessible prices.

As for film, prices have also risen, especially for Kodak film, but Ilford remains affordable, as do Kentmere, Fomapan, and Rollei.

I’ve travelled the same road numerous times, and it always brings me a certain sense of peace. I tend to stop off at familiar spots along the way, and those of you with an eagle eye will recognise some of these locations from other photos in this blog.

But why go to Noirmoutier? Firstly, why not? It’s just over an hour’s drive from my home and is a popular destination for many locals from the Vendée. The island now suffers from overtourism, which has certainly changed its character since 2016. Efforts have been made to manage the flow of tourists, with improvements such as parking, pedestrian zones, clearly marked hiking trails, and numerous bike lanes. It’s a beautiful part of the world, so typical of the Vendée Coast with its pinède and long beaches. However, not everything is about tourism. The island is also renowned for its salted butter made with salt from local salt marshes and the famous potatoes from Noirmoutier. Additionally, there’s a small fishing fleet, as well as the fleet from Le Port du Bec in the neighbouring Beauvoir-sur-Mer.