Nikon D7500 sensor measurements posted at PhotonsToPhotos


PhotonsToPhotos published their Nikon D7500 sensor measurements (D7200 vs. D7500, click for larger view):

Read Noise

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  • So, essentially same DR and noise with improved shadows.

    • RC Jenkins

      Almost.

      This means very similar (effectively the same) performance, with reduced ISO invariance in the D7500.

      In other words, the D7200 has better ISO invariance–better ability to push shadows as opposed to shooting with a higher ISO.

      • Oh. I read the chart as higher=better since the Y axis was listed as shadow improvement.

        • RC Jenkins

          Yeah, it’s easy to misinterpret.

          For perspective:

          https://uploads.disquscdn.com/images/7a8b292230e028577dc79c0dedbe2badab276e6dcb521b5b344fcdf891e9c4d2.png

          And here’s what that translates to:
          https://uploads.disquscdn.com/images/1314c6bc36e758d294a10907b426313b2c9f2ebf18dc5d53b56932112f95ea97.png

          You’ll see that for a given exposure, ISO 6400 looks pretty similar for the D750 & 5DIII.

          On the D750, ISO 6400 looks very similar to ISO 100 + 6 (pushing shadows @ ISO 100).

          On the 5Diii, ISO 6400 looks fine, but ISO 100 + 6 (pushing shadows) is terrible.

          The D750 is ISO invariant (flat curve), while the 5DIII is not (steep curve), even though the 5DIII has a ‘higher curve’.

          • RC Jenkins

            Specifically, for the D7500 vs. D7200, this means “At ISO 100, for best results, you can push shadows 2 stops; or at ISO 200, you can push 1 stop.

            If you plan on pushing more than that, use ISO 400 or above. From that point, using ISO 400 and then pushing shadows or using the ‘correct’ ISO doesn’t matter.”

            • Eric Calabros

              Its like D7500 is made of two ISO invariant sensors combined: one with slightly higher read noise than D7200, and one with slightly less read noise than D7200. If you are supposed to push 3 stops, you get cleaner result with D7500 if shoot at ISO 400 and push 1 stop in post.

            • RC Jenkins

              Dual gain. 🙂

  • Cynicaleye

    Wow, so glad I saw this chart. I’m sure I’ll be able to take better photos after this.

    • Eric Calabros

      Yes, you can take better photos if you know when your sensor’s dual gain kicks in, how much shadow lifting is safe and how much noise improvement you get with increasing ISO.

      • Lol. No. You can take good photos if you know how to expose correctly and compose the image. There’s no more to it than that. No one thinks, thank god I’m shooting Nikon because I’ll be pushing the raw file 6 stops. Haha.

        • Piooof

          I often think ‘thank god I’m shooting Nikon because I can recover this underexposed image’. But you always expose correctly, that’s great, good for you.

        • DSS

          Or I say “thank god I shoot Nikon, because I can push the shadows and pull highlights in this high-contrast action shot, to reveal more details.”

  • Rick Ram

    Essentially what it means is that depending on the type of use and your lens set one should not run to replace their 7200

  • CaMeRa QuEsT

    I see almost exactly the same sensor/processor tuning as on the D500, only the D500 uses scaling from ISO 10,183 and up, whereas the D7500 uses noise reduction from ISO 25,600 and up, but both get the same exact DR at every shared ISO level. There is a tiny bit more of shadow improvement used on the D7500 throughout the range, but nothing to call home about, unlike the basically 0 EV shadow improvement used on the D7200, which is a phenomena totally unique among all tested sensors.

  • MB

    Seems to me that D500 and D7500 sensors are exactly the same:
    https://uploads.disquscdn.com/images/b03bf1bc118c19d9841b8fdb07230fa11d0622cf05bc4451d4a24eb83e24f466.png
    https://uploads.disquscdn.com/images/f859d408a4345f251d5b66671d3370d6446a5fc5890bfb9889725cf190ab6b66.png
    PDR Shadow Improvement shows that rising ISO on D7200 does not bring any advantages over RAW postprocessing, and on D7500/D500 there is some gain up to ISO 400 … sharp rise at HI-ISO author calls a mystery 🙂 …
    http://www.photonstophotos.net/GeneralTopics/Sensors_&_Raw/Sensor_Analysis_Primer/Photographic_Dynamic_Range_Shadow_Improvement.htm

  • Amir

    Simply put,stick to your D7200,unless you have D7000.D7100 holders are in doubt,though! The rest are philosophical thoughts!

    • Piooof

      Unless you need a better AF. Or a faster frame rate. There’s more to a camera than the sensor…

  • BG

    According to that website, the D810, D750 and D610 have almost the same DR. Is that true? I always thought the D810 was quite a bit better due to its ISO 64 setting?

    • Michiel953

      Yes, at 64 ISO. Which you can shoot at quite a lot.

      • BG

        Well then is the data on that website wrong…?

        • RC Jenkins

          The data on that site should be correct. It is a common misconception that ISO 64 is ‘quite a bit better due to its ISO 64 setting.’

          In fact, the D810 at ISO 64 is roughly the same as the D750 at ISO 100–and the D750 has clearly superior DR at the same exposure.

    • RC Jenkins

      It doesn’t. At base ISOs, the D750 has the highest overall DR, followed by the D810 & D610 (tied).

      In other words, the D750 at ISO 100 is similar (even slightly better) than the D810 at ISO 64, which remember requires different exposures and gives the D810 more light.

      After base ISO, the D750 continues to be better than the D610, which is better than the D810.

      Even on other sites, the D750 at ISO 100 and the D810 at ISO 64 usually end up with similar DR.

      It’s a common misconception that ISO 64 gives the D810 better base ISO DR than the D750. It actually just compensates for its worse performance in order to ‘equalize’ the two.

  • Hysz

    Better than 6DII, damn it.

  • Hairsplitting.

  • SteveM

    I honestly didn’t expect any improvement to high ISO noise or dr as I think they may have maxed out what they can do….I really can’t complain about the superb performance of this and the D7200, so more than happy still. The loss of a card slot doesn’t bother me personally as I’m not using it professionally. Now, 8 fps and group af are both fantastic additions. But, and isn’t there always one, 8 fps and group af (+ bigger buffer) make this a very useful sports/bif camera, almost pointed at that market segment. To do bif/sport would suggest some big lenses,70-200 f2.8; 300 f2.8 (that’s what I use) and bigger, a battery grip now becomes very useful for balance and mostly for vertical format shooting – the extra shutter release.
    I accept this is a contentious statement, but why oh why make such a b….. useful bif/sport camera and then make it redundant to some with the omission of the battery grip? I can only hope they make one that fits in via the battery door as Canon’s do I think. I would upgrade immediately then, as it is I’ll keep using my D7200 which I am still extremely content with.

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