P: 100% or 1:1 Zoom

Perhaps this is more of a feature request than a problem, but I agree it would be a great feature for “pixel peeping”. Having Lightroom perform consistently / predictably no matter which camera is being used, is a boon. Programmatically it’s actually more complex to adapt to / vary based on camera, than having a basic 100% zoom.

Thanks Rikk. Couple of additional observations. I need to check but seems as if initial zoom factor may have changed a bit with the new v4.1? Slightly higher zoom factor >50% but still definitely not 100%. Repeated double tapping still results in 200% zoom. Thing is number of double taps to get to 200% zoom is inconsistent. It can happen quite quickly with some images, but may require multiple double taps in other cases. Once it starts though double tapping will consistently result in 200% zoom. Only way to stop this is to select a new image and go back to previous image again. Then process repeats. I also use Apple Pencil and I think the jump to 200% zoom occurs more readily with that rather than finger tapping. Although behavior also occurs with finger tapping might be less frequent. Either way the initial zoom factor is never a true 100%

Thanks for the detailed feedback, Roy. I've put your thread in front of the Lightroom CC for iOS team for review.  You don't need to upload the additional screenshots that Victoria requested. (unless she really wants to see them...)

I am trying to upload additional images but getting an internal server error. Presumably files exceed 2MB. Not actually sure what additional info I can provide to prove this zooming behavior? I am following a standard approach to get my image files from the camera to Lightroom mobile on the iPad.

Hi Victoria, here is a selection of screenshots. I wasn’t really sure what information to show you. I just updated to version 4.1 and zooming behavior is unchanged.

1) Processed RAW (NEF) file shot on my D850 and imported to Lightroom mobile as described above. As you can see it is original file at full resolution.

Hi again Victoria. I’ve given a detailed verbal description above. What specific information would you like me to capture in screenshots to help along a resolution? Thanks.

Yes, I'll try to do that tonight. In meantime here are some additional details:

All my image files are synced with Lightroom Classic on my desktop, but just to underscore I have originally imported files to iPad and then used Lightroom Mobile to add files to Lightroom Mobile albums. The process is entirely managed on the iPad. Fact that I am then syncing images to Lightroom Classic on my desktop is secondary and should not affect anything.

Also to clarify what I regard as true 100% zoom. If we take my D850 full res images as an example. These images are 8256 pixels long. The 13" iPad Pro screen resolution is 2732 pixels on long axis. This means that at 100% zoom apprx 1/3rd of image should be displayed over the full screen on the long axis. This is never the case. Initially when opening an image and double tapping ~2/3rd's of the image is displayed along the long axis implying around 50% zoom factor. When repeatedly double tapping same image it eventually jumps to higher zoom where apprx 1/6th of image is displayed along long axis. This implies ~200% zoom factor. For true 100% zoom apprx 1/3rd of my D850 image files should be displayed along long axis, right?

Another point is I have same problem with files from my D500, but first zoom ratio is different. With D500 on first opening image and double tapping, again apprx. 2/3rd's of image is displayed on long axis. This time though this implies a 75% zoom factor due to the lower sensor resolution of the D500. When repeatedly double tapping I will again see zoom factor suddenly jump and with D500 files this time with apprx. 1/4 of image displayed along long axis. This corresponds to 200% zoom factor which is same as with D850 files.

So basically 1) when first opening an image and double tapping to zoom, the zoom factor will vary depending on image file resolution, in this case 50% zoom for D850 and 75% zoom for D500 full res. images, and 2) when repeatedly double tapping zoom factor will eventually pop in displaying apprx. 200% zoom factor for both D850 and D500 files.

Regarding process for importing files to iPad and then to Lightroom mobile, here are my steps:

1) Connect XQD card from camera via card reader to iPad Pro
2) iOS Auto import window pops up
3) Select images to be imported and import
4) Open Lightroom CC Mobile on iPad Pro
5) Create new album in Lightroom Mobile
6) Select add photos to album
7) Select images from iOS "last import" and add images to Lightroom album
😎 Once images are in Lightroom Mobile album I delete images in the iOS "last import" to prevent uneccessary iCloud storage space use
9) That's it, and then Lightroom Mobile proceeds to upload image files to Adobe Creative Cloud. I am allowing unlimited cache size to maintain local copies on iPad Pro. I have never performed clear cache.

When I then review images in Lightroom mobile I initially see message "Smart Preview" in the file information display and after few seconds changes to "original". Full image resolution information is available and displayed correctly. However zoom function is as described above.

Hmmm. Can we get some screenshots of the different stages then? That might offer some clues.

Hi Victoria, thanks for the response. Yes, I am aware of this. My images are full size originals uploaded direct from camera to iPad Pro and then added directly to albums in Lightroom Mobile. File information in Lightroom CC mobile confirms full resolution original files, yet I am unable to achieve a true 100% zoom. All my files are stored in cache on the iPad. I have changed settings to locally store original files, but that makes no difference to this issue. I have seen same subject being discussed in other postings with same answers being offered and that's where discussion seems to end with no resolution. Any ideas?

Zoom resolution will depend on how the photos got to the device. If they were uploaded through Lightroom Classic, the full size originals aren't available. Those are only 2560px long edge, with 100% being 100% of that. If they were uploaded through any Lightroom CC app, then they should be a true 100%.