Resolution lost when resizing image

[Felipe Milori]

Why I am not able to maintain high resolution when resizing an big image?
I have a pretty big image that I took straight from my camera (4912 x 2760 px) and I need to change size to 700 x 300 px to upload it as a website banner.

The problem I am having is that when I try to do that, my image gets completely pixelated, like a very low resolution image.

I was able to do the exact same task flawlesly with Photoshop and even Pixlr. Why Affinity Photo can't do that basic task?

Am I doing something wrong?

[carl123]

Can you zip that image and upload it to the forum

(the original image not one you have resized)

[Alfred]

What resizing algorithm have you used? ‘Nearest Neighbour’ will always yield blocky results.

By the way, you can’t resize from 4912 px × 2760 px to 700 px × 300 px without significantly distorting the image.

[dutchshader]

The image is zoomed in at 555% , 

[Felipe Milori]

Sorry guys, it seems that when I switch to Resample "Lanczos 3 Non-Separable" the result I got is much better.

And also, with the same zoom (200%) Photoshop and Affinity Photo look pretty similar.

Thanks for all the replies.

[John Rostron]

You should assess your final image at 100%. This is how your target viewers will see it.

John