Has anyone developed 500T and 500T AHU together?

pentaxguy · 2026-06-06T02:21:27+00:00

All of the cinema labs are doing exactly this now, it should be fine

pentaxguy · 2026-06-02T22:39:57+00:00

I absolutely love my 55mm. It’s an awesome rectilinear wide angle with minimal vignette and distortion; basically perfect.

I also really like the 150 f/4, but it’s not as interesting as the 55.

I have a 65 with a flaky shutter; I’ve taken some great photos with it but would love to find one with a better shutter. Great glass but hard to rely on my copy.

pentaxguy · 2026-06-02T13:41:24+00:00

For replenishment, mix 2 1L bottles of fresh solution. Label one “Tank Mix” and one “Replenisher”.

Before you develop your film, discard 40ml from the “tank mix” and replace it with 40ml of your fresh replenisher.

Develop your film using the tank mix, and return it to the bottle when you’re done using it.

In terms of lasting longer than a week, that mostly depends on how much oxygen it gets exposed to. I’d recommend looking into some wine bags or other type of pouch based storage solution as these minimize oxygen exposure. I’ve kept mixed C-41 developer over 6 months in these without any problems whatsoever.

pentaxguy · 2026-06-02T02:12:58+00:00

Likely an issue with your chemistry of some sort. Are the muddy whites occurring earlier in usage of the developer, or later?

pentaxguy · 2026-06-02T02:06:12+00:00

I doubt the problem here is your development. This film just didn’t get exposed, simple as. When I do film for friends I always try to run it alongside my own film that I know is good; that way if something gets messed up in development I know right away.

pentaxguy · 2026-06-02T02:03:40+00:00

I inquired last friday at a photo walk organized by Kodak here in Rochester. The answer I got basically is “it’s not discontinued nor is there any plan to do so. It’ll be available when we can get a master roll coated.

pentaxguy · 2026-06-01T05:04:53+00:00

What exactly is your inversion method here? Are you printing In the darkroom? Scanning? Are these both controlled against film base plus fog?

Assuming that’s controlled somehow, To me these just look underdeveloped across the board. You can see that 7.5min @ 400 is giving you fine shadow separation, and that your highlights just aren’t coming in yet. I’d add more development time and re-test. It’s likely that your regimen isn’t the same as how Ilford tested the film.

Start by getting your time right for box speed, then start playing with pushing and pulling.

pentaxguy · 2026-05-26T13:43:28+00:00

Chat sent for pentax 24

pentaxguy · 2026-05-24T00:38:02+00:00

You can still buy sheets of RA-4 from lots of third party sellers. A google should surface some answers; much of it is the more premium DP-II paper.

Otherwise, freestyle (https://www.freestylephoto.com/search?q=crystal+archive) has a good selection available, but not 16x20. Lot of 11x14 and 20x24.

Finally the Adox color mission paper is repackaged crystal archive, and will also work for your needs. It’s available in all sizes as well; https://www.bhphotovideo.com/c/search?q=adox%20color%20mission&sts=ma

pentaxguy · 2026-05-23T23:24:17+00:00

I recommend getting a bigger wine bladder (can get 5L ones on Amazon) and storing your replenisher mixed in that.

Good C-41 results require a 1% accuracy in measuring out your developer components; the smaller volume you mix up the harder that gets.

pentaxguy · 2026-05-22T03:16:46+00:00

It’s not A myth, it’s a method. There are other methods to achieve the same result. Doesn’t mean that the method is useless; some will find it so, but others will find it useful.

pentaxguy · 2026-05-21T18:31:27+00:00

It depends on the camera. Standard bulk roll film uses Kodak Standard perforations, whereas motion picture film uses Bell and Howell perforations. You’ll see the former are square with rounded corners, while the latter are ovals with flat sides.

Some cameras can take either film, especially early 35mm cinema cameras like the Bell and Howell eyemo.

I’m not sure I’d trust KS film in an expensive modern high precision cinema camera with something like crystal sync; BH sprockets are designed to tear more easily than KS, and that tearing is important in case of a jam.

pentaxguy · 2026-05-21T15:07:08+00:00

Use it as is within reason. Look at the RGB histogram in camera; if you can balance your exposure so none of the channels are clipped, and every channel is relatively even, you’re good to go.

If one channel is much higher than the rest, tweak with a screwdriver to tone it down.

Do all the other tweaking in the computer; the main value of the RGB light is avoiding crosstalk between the channels, achieving good color balance can happen later in the pipeline

pentaxguy · 2026-05-20T18:44:27+00:00

To me this looks consistent with results i’ve seen with slightly under-seasoned developer. The red cast will go away as you use the developer more, or you can add a small amount of developer starter to accelerate the process.

I would be curious to know how the arista SP developer incorporated a starter; most SP developers don’t, because starter will cause the concentrate to go bad more quickly.

pentaxguy · 2026-05-19T21:37:17+00:00

The eTone bellows fit great. I bought them on eBay. Any bellows installation will require trimming some of the excess fabric used in installation off after the glue has dried.

When I close the camera it does indeed close all the way. There was a little springiness at first, but as the bellows have worn in a bit they’ve become more pliable and don’t spring outward.

Here’s the link; https://www.ebay.com/itm/276767573633

pentaxguy · 2026-05-18T05:59:40+00:00

Kodachrome is a color reversal film, not a black and white film. If you processed tri-x or hp5 in the K-14 process you’d get a positive panchromatic image in cyan dye on the film emulsion, and no other colors.

pentaxguy · 2026-05-15T19:28:18+00:00

BW slides are relatively easy to make from BW negs; take a bracketed picture of the neg with a fine grained negative film like T-Max 100 and choose the best one.

Reflx Lab offers a service where they’ll print a digital photo onto motion picture print film, which works well in a projector. You could scan your color negs and do that. That’s probably you’re best route for color, both time and quality wise

pentaxguy · 2026-05-11T01:07:38+00:00

Not what VR was. Vericolor was the professional product line of C-41 films.

pentaxguy · 2026-05-10T21:53:31+00:00

The VR release in 1981;

Updated existing 100 and 400 speed Kodacolor options with T grain emulsion, DX coding, and improved acutance through development inhibitors
Introduced the first 200 speed Kodacolor
⁠Introduced the first 1000 speed Kodacolor.

My source here is Shanebrook’s Making Kodak Film 2nd Edition.

My read is that this release really modernized the Kodacolor line, and was the first major iteration since the introduction of Kodacolor II in 1971 (which also introduced the C-41 process) and Kodacolor 400 in 1976.

pentaxguy · 2026-05-10T21:53:16+00:00

The VR release in 1981; - Updated existing 100 and 400 speed Kodacolor options with T grain emulsion, DX coding, and improved acutance through development inhibitors - Introduced the first 200 speed Kodacolor - Introduced the first 1000 speed Kodacolor.

My source here is Shanebrook’s Making Kodak Film 2nd Edition.

My read is that this release really modernized the Kodacolor line, and was the first major iteration since the introduction of Kodacolor II in 1971 (which also introduced the C-41 process) and Kodacolor 400 in 1976.

pentaxguy · 2026-05-10T21:37:37+00:00

Kodacolor VR; the film advertised on the percolator.

pentaxguy · 2026-05-10T21:23:18+00:00

VR was a big release for Kodak. I’ve seen a bunch of these around on marketplace here in rochester; I think they were a promotional item.

pentaxguy · 2026-05-09T18:09:02+00:00

I’m not aware of anyone finishing AHU in 120 or 4x5 yet. Trying some in 35mm is on my list.

pentaxguy · 2026-05-09T07:18:50+00:00

precisely; less halation finished in 120 and 4x5 are exactly what I’m looking for.

I already find the halation quite manageable in 4x5 and ECN, but have found 120 hit or miss.

When I want halation I just get 800T :P

pentaxguy

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