Admesy Hera‑01 20 mm vs Jeti 1511

Hi,

I'm looking for a spectro to create offsets for my CR-100 colorimeter. Thus far all my displays are LCD, but I'm going to start using QD-OLED displays also.

I'm trying to avoid the pricing of a new Jeti 2501 or CR-250.

I might be able to get a recertified Jeti 1511 (not hires) for 3500-ish Euro (ex VAT), but I'm also seeing the Admesy Hera-01 20mm, for 4600-ish Euro. The Admesy Hera has a bandwidth of 2,3 nm, vs 4,5nm on the Jeti 1511.

Spec-wise the Admesy Hera seems like the better option for creating offsets for my colorimeter, but I'm not seeing a whole lot of mention towards the Admesy although the Lightillusion website states it's supported.

So would there be a good reason to choose a recertified Jeti 1511 over a new Admesy Hera-01 given 'only' 1000-ish Euro price difference?

Thanks,

Barend

Hera is not manufactured anymore. Last batch was October 2025. They have a new spectro in the pipeline, which will compete with CR-300. But at aconsiderable higher price.
Contact Admesy or ff.de, maybe they have refurbished.

Thanks. So if I would be able to get an Admesy Hera-01, would you recommend it over the Jeti 1511 (non hi-res)?

Better spectral bandwidth (optical resolution (FWHM)) wins every time. But there are also other factors who will influence your decision, so be careful.

Kuky
Haha - that sounds a bit ominous!

But as you already suggested the Hera looks to be discontinued and not available anymore. So then a recalibrated Jeti 1511 might be the next best option as long as I'm not trying to calibrate laser projectors (ugh...)

Thanks, I learned a new word. Had to google it.
In reality there is nothing ominous about it. Buying a professional spectro is a little bit more complex than simple A > B. Good luck!

Better (quoted) spectral bandwidth is often not the decider as to the better probe.

Other issue such as polarisation, stability under different uses, variations dependant on settings, and more, can actually be far more important in reality.

Often, better results are gained with spectros that have quoted poorer spectral sensitivity, but are better elsewhere.

Steve

Exactly, also look for : time /price to recertify (hugely important for price calculation), angle of acceptance (mostly for projectors), repeatability (!)

OK I understand that specifications on paper are only a part of the total equation which is exactly why I'm here asking around for people with more knowlegde of these devices than I have.

After some more searching I have a lead on a brand new Admesy Hera-01, and a used Jeti 1511 that would be recertified by Jeti before receiving it. In that case (given the new Hera would be around 1000 euro more than the Jeti, would you recommend one over the other, for use with my CR-100 and Colourspace?

I went through this some time ago and did a bit if research then.
I found the Admesy probes were said to suffer polarization and then saw the changing results with different probe settings.
I went with a CR250RH as I didn't like the variability.

It would be nice to backup with some evidence, actual data.

Hera has a depolarizer and a holographic grating.
This is a test with Hera of a white LED with a polarizer in front, so fully polarized light source, aka worst case scenario. The worst deviation in 100 measurements was dx = 0.000533 dy = 0.000076 which also includes the light drift.

I don't have experience with Jeti/CRI polarisation error but there are a couple of calibrators in the AVS forum who got fed up with polarisation errors and drift on a certain spectro and sold it for the other brand. Search for the discussion.

What changing results?

With any probe, testing for polarization is simple.

Using a LCD display that goes dark when you look at it with a pair of polarised sunglasses, and rotate the glasses.

Then take a set of measurements with any probe, and then take the same again with the probe rotated 90deg.

Compare the results.

You can see this on the the Probe Accuracy page.

As for different probe settings changing results, see the Admesy User Guides on this website - the potential issues are detailed there.
Originally it was thought to be an issue when probe matching, but further testing defined the actual problem.

That information was provided to Admesy some time back, and which they agreed would happen with some settings configurations.

Steve

I was adding my thoughts in answer the OP's questions.
For me if I can not trust the measurements that is a game stopper.

No probe is perfect.
It is really a question of what fits best with your requirements.

Steve

OK I decided to go with the recalibrated Jeti 1511 for now, since the spectral bandwidth would be sufficient and the Jeti is a fairly standard piece of equipment in this field.

Thanks for your input.