I was using 6400 ISO with a f2.8, 28 mill lens with a .46 adaptor on a canon m50 for about 15" for this photo. I tried a 1.8 50 mill, 28 mill w/o adaptor, longer exposure, shorter exposure, higher/lower ISO but to no avail. I was wondering why the milky way is so hidden in these photos. I can barely see it but it runs vertically. Is it something I did during the photo taking? Or post-processing? Thank you guys.
Amateur astronomer here. Most images of the Milky Way we see around are the results of multiple exposures combined in Photoshop or another image-editing software. However, it is indeed possible to get some nice single-shot images, but as xenoid pointed out, you’ll need to play in the curves or otherwise enhance your image in postprocessing.
One thing I suggest you acquire is a light pollution–reduction filter. They are not very expensive (maybe $80 if I remember well, but you might find for cheaper on the second-hand market) and give good results at removing all the light that comes from human technology.
'Photo stacking' is a method in which you take multiple images from the same orientation and location, and 'merge' them in post-processing. This enhances the starlight, and reduces the light pollution (very intuitive explanation, not scientifically complete). Using this method enhances the images in a much better way.
You can still use post-processing to do all of this, but photo-stacking is much much better than this.
A wonderful tool for doing all of this is Sequator. It is specifically made for editing star images (Astrophotography), and has an option called 'Reduce Light Pollution'.
After that, simple contrast and saturation boosting gives you the desired results!