• Welcome to the Lightroom Queen Forums! We're a friendly bunch, so please feel free to register and join in the conversation. If you're not familiar with forums, you'll find step by step instructions on how to post your first thread under Help at the bottom of the page. You're also welcome to download our free Lightroom Quick Start eBooks and explore our other FAQ resources.
  • Stop struggling with Lightroom! There's no need to spend hours hunting for the answers to your Lightroom Classic questions. All the information you need is in Adobe Lightroom Classic - The Missing FAQ!

    To help you get started, there's a series of easy tutorials to guide you through a simple workflow. As you grow in confidence, the book switches to a conversational FAQ format, so you can quickly find answers to advanced questions. And better still, the eBooks are updated for every release, so it's always up to date.
  • It's Lightroom update time again! Just the usual new cameras, lens profiles and bug fixes. See this blog post for Lightroom Classic and this blog post for the Lightroom Cloud Ecosystem changes. If you use a custom monitor profile on macOS, note that the Classic performance bug is not yet fixed.

Tecnical differents between LrC HDR and PS HDR Pro

Joined
Sep 2, 2015
Messages
8
Location
Norway
Lightroom Experience
Power User
Lightroom Version
Classic
Lightroom Version
Lightroom Classic 10.1.1
Operating System
  1. Windows 10
  2. macOS 11.0 Big Sur
I notice now and then that users tell LrC HDR is not good enough, so they have to use Photoshop HDR Pro, which can edit in 32 bits. Ps HDR Pro uses Camera RAW to edit.
My question is - are the two applications technically different?
Aren't they built on the exactly same engine with the same features?
I am adding a final result based on the same NEF files with the similar edits? (I did not write down the exact values of all sliders)
 

Attachments

  • HDR-Ålesund-PSD-LrC.JPG
    HDR-Ålesund-PSD-LrC.JPG
    630.9 KB · Views: 20
Joined
Jul 2, 2015
Messages
10,722
Location
Netherlands
Lightroom Experience
Power User
Lightroom Version
Yes, there is a difference between Lightroom HDR merge and Photoshop HDR Pro (note that Camera Raw can also merge to HDR. That is the same as Lightroom). Lightroom HDR DNG is 16 bits floating point, while Photoshop HDR Pro creates 32 bits integer files. This document explains it: Adobe DNG HDR Format, Part 1

In practise it also means you have to treat the process differently. For most HDR software, including Photoshop HDR Pro, the advice is to shoot at 1 stop intervals, so you will normally merge 5 to 7 images. For Lightroom HDR the advice is to only use 2 images if you shoot with up to 1.5 stops difference (-1.5, +1.5), and use 3 images if you shoot with 2 stops difference (-2, 0, +2).
 
Joined
Sep 2, 2015
Messages
8
Location
Norway
Lightroom Experience
Power User
Lightroom Version
Classic
Thanks a lot for your complementary reply. I believed LrC DNG HDR also is 32 bits, but now I must change my mind. It sounds logic that 32 bits demands more images to capture all nuances. We need to convert the 32 bits to 16 bits in Ps, in order to do more editing. I need to go testing this, to see if I am able to see the differences.
 
Top