Zoom in to a selection only

[pmcabinet]

Is there a way to zoom in on a selection as if using a magnifying glass over the selected object? Leaving the background at its native resolution, that is.

I created a donut shape, selected it, inverted the selection and used a live filter to blur the background, as shown. But I'm curious whether it's possible to zoom in on just the area inside the donut - and how I would deal with the donut if such a method exists?

Maybe isolating the subject, saving it, then placing the image on the blurred background?

[v_kyr]

1 hour ago, pmcabinet said:

Is there a way to zoom in on a selection as if using a magnifying glass over the selected object? Leaving the background at its native resolution, that is.

No.

1 hour ago, pmcabinet said:

I created a donut shape, selected it, inverted the selection and used a live filter to blur the background, as shown. But I'm curious whether it's possible to zoom in on just the area inside the donut - and how I would deal with the donut if such a method exists?

AFAIK such a direct method doesn't exist. You would have to use an external third party magnifier tool instead, which you then place on top the area you want to show up magnifed. - Or you would create a circle selection copy of the wanted area, then magnify/enlarge that area copy and then place it on top of your image in a layer.

1 hour ago, pmcabinet said:

Maybe isolating the subject, saving it, then placing the image on the blurred background?

Yes, basically you would copy/extract the wanted image area (aka making a circle selection and taking a copy of just that area), then seperately enlarge/magnify/zoom that copied image area and finally place that enlarged image area portion back on top of your initial image where you want it to be.

[JimmyJack]

1) Position an un-blurred copy of the motor as a child of the circle. (don't think you need a donut here)
2) Enlarge. To enlarge the image from a specific spot (in this case I'm assuming the circle center), enable and move the transform origin to where you want it and hold CMD when resizing.
(I also have a pretty cool INTERACTIVE version of this effect if interested.... like moving a loupe over the image in real time. But that's a different post I guess)

This should do what you want:

[RichardMH]

If you're on a PC might be easier to create a New View and float the window. The zoom in in one window. I have 2 screens though which makes this easier.

[pmcabinet]

Thanks everyone for your suggestions; I should have enough to work on for now!

PS: JimmyJack, where can I see this 'pretty cool interactive version'?!

[JimmyJack]

On 4/2/2022 at 12:51 PM, pmcabinet said:

PS: JimmyJack, where can I see this 'pretty cool interactive version'?!

How about right here 😃.

Couple of notes:
• Requires filter(s) in Photo. It's not using actual zoom. It's using either a Spherical or Punch filter, and therefore is limited to their 100% values.
• To set a custom center point for the chosen effect click on canvas when it's panel is active.
• The three elements need to be selected as separate entities and moved together. Grouping them destroys the different "lock children" attributes needed.
• I'm not sure how useful it is. It's not really a tool per se. And Affinity doesn't do animation, so... there are faster ways to get to the same end result, without limitations, for a static output (see my post above). Although, the slight curve of the filters sells the effect nicely 🤔.
• So it's really just kinda more of a fun trick. That being said.... have a play.

live loupe AP.afphoto

[NotMyFault]

The perspective live filter can be used as magnifying glass.

unlimited zoom level.