Photoshop alignment tips required

Question

Hi all,

I'm a complete beginner when it comes to astrophotography and wondered if anyone could help me.

I've got around 10 images of the milky way above a nice foreground subject. I'm hoping to separate the sky from the foreground and stack in Photoshop to remove noise.

So far I have successfully stacked my foreground portion of the image and I'm happy with the result, however when I try to stack the images to remove noise from the sky.. stars in the corners of the image are blurred.

I have tried the following process:

- get frames and mask to remove foreground

- auto align layers (I have also tried with the distortion setting enabled and manually aligning but still no luck) * - this is the problem step, when changing the visibility of the different layers there is a noticeable difference in alignment but this process has worked for other images with this lens

- remove mask

- concert layers to smart object

- use median stacking mode

Can anyone tell me what I'm doing wrong? Or send a link to some different instructions?

Thank you in advance

Bojan Živković11378569 · Answer

stars in the corners of the image are blurred.

By @jadei36511817

Do you have sharp stars on some image(s)? Do you understand why this is happening? Use masks to reveal layer(s) content where stars are sharp instead of some other where stars are blurry.

Do not remove mask(s) but rather change/modify them.

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