Dynamic crop, how to find the same

[hardcity]

Hi,
How to remake the same crop on two series of images? Last year, I made a series of images of ngc6888 in Ha with all PI pre-treatment (I use dynamic_crop). This year I remade a series of ngc6888 in LRGB with the same material. I would stack this series with the series of last year but I can not find the same dynamic_crop. Is this possible without redoing everything? Can you help me? Thank you.

[pfile]

sure, just use your old image as the reference image for the StarAlignment of the new subexposures. you may need to tweak the star detection parameters a little bit since your finished image is stretched, but it should work.

rob

[hardcity]

Indeed! He was thinking! I thought the reference image (which is resized by dynamic_crop) should be the same size as the other news. It works! Thank you!