> The end result is that I have... lots of shots with ISOs higher than I'd like. The image quality is not terrible at those ISOs, but...

It's not clear to me whether you want lower ISO values for the sake of having lower ISO values or whether you actually find the noise that results from high ISOs objectionable.

For instance, I don't like chroma noise, such as may be seen in [flolilo][1]'s [sample image][2]. But I don't mind more monochromatic noise, which my camera tends to produce. So even though I'd *like* lower ISO values, I let my camera run up to ISO 12800 because I know I'd miss the shot otherwise. However, if I do need cleaner images, I find ways to add more light.

**Some options to consider:**

* Meditate on what it means for ISO to be high.

* **Use the 35/1.8.** You can't get the shot you want with it, but you might still not get the shot you want with the zoom lens.

* **Use slower shutter speeds.** 1/125 *may* be faster than necessary. Since you state you are using the zoom lens for focal lengths wider than 35mm, 1/60 should be fine. Even slower if your lens has image stabilization. I use 1/40 throughout the zoom range of my kit lens (18-55). I use 1/100 for non-stabilized lenses (up to 135mm).

* **Use a flash** (with diffuser or bounce), or find some other way to add light.

* Post process to remove noise or convert to black and white.

* **Put the camera down and just enjoy the moment.**

* **Get new lenses.** Here are some that *might* work:

    * 24mm or 28mm prime (any make)
    * 24-70/2.8 or similar (any make)
    * Sigma 24-35/2 Art
    * Sigma 18-35/1.8 Art

* <s>**Try a focal reducer?**</s> Too bad... They don't work on DSLRs.

* **Get a new camera** that produces less (objectionable) noise at high ISOs.

  [1]: https://photo.stackexchange.com/a/106381/75526
  [2]: https://i.sstatic.net/uethL.png
  [3]: https://photo.stackexchange.com/a/102232/75526
  [4]: https://photo.stackexchange.com/a/18021/75526