Resizing for Slides Gallery

I have Lightroom CC and after my general processing I export a Tiff file to JPEG and use 1400px wide and 450px high. I have cropped to a panorama shape as part of my processing. Lightroom CC resizes my image to a height of 269px rather than 450 as requested. My image is therefore not acceptable for the Slides Gallery. What am I doing wrong please? When and how do I crop the original Raw file?

Hi Robin - I think your issue is that your Tiff file is not cropped to a format size of 1400 x 450 pixels. Therefore, when you export to a jpeg, LR has no choice but to give you a size that fits your crop aspect no matter what size you select. I believe your other side will be 1400px.Therfore crop your image to an aspect of 1400 x 450 before you export.
Hope this helps
Cheers
Tony

Thanks Tony but I am still stuck. I upload to Lightroom CC from my camera. I do my general processing including cropping then edit in Topaz denoise. When the image comes back to Lightroom CC there are 2 images in a stack. One is the original ORF (Raw) file and the other is the denoised TIFF file. When I export I choose the Tiff but sometimes both files are exported. I put the correct dimensions for slides in the file size but it comes back with a lower height dimension and is not acceptable for our gallery.
You have said crop my image to 1400x450 before exporting.....so I have done an initial crop of my raw landscape image to a panorama style but cannot find where to choose the correct dimensions at that stage. I think that must be the problem.
I am relatively new to LCC.
Robin

Hi Robin,

When you do your initial crop, make the ratio size 1400 x 450 which is what you require at the end.

In LR
a. Go to the crop tool and select "Enter Custom"
b. Enter 1400 x 450 in the "Custom Aspect Ratio" Box. This is the final ratio that you require.
c. Export the file as jpeg and place 1400 / 450 in the "Image Sizing" area of LR's Export Window. Select your other parameters as required. This will give a final size of 1400 x 450 pixels.

Your other issue of exporting both the RAW and Tiff files is that you have both images selected in LR. Just select the one you wish to export.

Hope this helps
Cheers
Tony

Thank-you very much. That explains where I went wrong. As I suspected it was my first crop.
Secondly I will have to be more careful with the stacks. Maybe I should select for export from the library.
Much appreciated Tony,

As a postcript I discovered that I need to crop the Tiff file rather than the original raw file. I have had a successful upload to the Slides Gallery. Hopefully it will be published.