Really‽ Significantly? What are you comparing to? Royal, Gold Ektar 25?
Looking in a pretty good microscope I'd say Ektar is not very far off from TMax 100.
What exactly would you say the difference is? Why is it? Is there good reasons? IE was it done as a tradeoff, getting other things in return?
Even Kodak themselves have advertised Ektar 100 only as "finest grain ISO 100/21° color negative film". But
never as highest resolution or sharpest ISO 100/21° negative film.
They know why: Because Ektar 100 was designed with focus on grain, but not with priority for resolution and sharpness.
Here are the results for Ektar and other ISO 100/21° CN films from my standardized resolution tests (you know my procedure, so I don't repeat it here again):
- CineStill 50D: 105 – 115 lp/mm
- Kodak Ektar 100: 90 – 105 Lp/mm
- Kodak Farbwelt 100: 105 – 115 Lp/mm (Gold 100 for the German speaking market)
- Fujicolor 100: 120 – 130 Lp/mm
- Fuji Superia Reala 100: 105 – 115 Lp/mm
- Fuji Pro 160 C: 100 – 115 Lp/mm
- Kodak Portra 160 NC-2: 100 – 115 Lp/mm
- Kodak Portra 160 VC-2: 105 – 115 Lp/mm
- Kodak Portra 160 New: 105 – 115 Lp/mm
And for your opinion that "Ektar is not very far off from T-Max 100": My test results demonstrate a completely different result, as TMX has achieved 135 - 150 Lp/mm in my test. Ektar cannot compete at all concerning resolution and sharpness with TMX. TMX has the highest resolution of all ISO 100/21° BW films (but Delta 100 coming close).
Same is valid for ISO 100/21° colour reversal films: Former E100G, Elitechrome 100, Provia 100F, Sensia 100, Astia 100F , the Velvias, all are in the 120-135 Lp/mm range, surpassing Ektar significantly. Also new E100, with about 110-120 Lp/mm.
Resolution is the weak spot of Ektar compared to all other colour films in that class. To be absolutely sure I have done the Ektar tests 6x, all with different batches. Always the same result.
As for Portra 400:
- Kodak Portra 400 NC-3: 100 – 110 Lp/mm
- Kodak Portra 400 (new): 80 – 100 Lp/mm
Why have these three newer / younger Kodak films finer grain than their forerunners, but worse resolution (and sometimes also less sharpness)?
I don't know for sure, but that may be a possible reason:
All these films were advertised as "optimized for scanning". Generally I don't care much for marketing statements. Especially if it is not further underlined with details as in this case.
But Kodak is well aware that most of the films, especially CN films, are scanned nowadays. But they of course also know that all current scanners fail concerning higher resolution. None of it is capable to fully resolve all the detail which is really on the film (I have tested that several times over the years, too). Even the highest resolving scanners - drum scanners - cannot fully resolve all details on the film, and have lower resolution capacity than classic optical enlarging and slide projection.
So maybe Kodak decided "if the majority of photographers destroy the high resolution on film anyway by using the lower resolving imaging chain scanning, then we don't need to care for high resolution anyway."
But finer grain is even seen on 'bad scanners'. Even on the very low resolution flatbed scanners.
So they decided to concentrate on finer grain, and 'sacrificed' resolution. Well, again as said above, that is a hypothesis, a possible reason why they went that way.
I am not a fan of this approach, and prefer those films in Kodak's film programme which combine excellent fineness of grain with excellent resolution and sharpness, like TMX, TMY-2, TMZ and Portra 160. Because I like larger prints.
Best regards,
Henning