Best astrophotography lens for Canon EOS R5 Mark II?

Honestly, jumping in here as someone who's spent years hauling gear into the desert for those perfect dark sky shots, you've got a great budget to work with. But before you pull the trigger on something based on price alone, I really need to ask a couple of things to help narrow down what will actually stay in your kit long-term. * Are you planning to use a star tracker (like a Star Adventurer or similar), or are you looking for a lens fast enough for untracked single exposures? * How much do you value filter compatibility? Do you need screw-on filters for daytime work too, or are you cool with those massive bulbous front elements that require a specialized (and pricey) filter holder setup? Basically, the R5 Mark II is a beast of a sensor, and it really exposes any lens flaws like coma or heavy vignetting. If you're planning on tracking, you can afford to be a bit more flexible on aperture, but if you're shooting static, we're looking at a totally different tier of glass. Let me know what your workflow looks like!

I'm new to this, but the Rokinon 14mm f/2.8 is AMAZING! Got mine used for $250. Worth a look!

Before dropping $1500, consider a used Rokinon 14mm f/2.8. It's a decent option for wide-field at around $300. See if astro is *really* your thing before committing serious cash. Remember proper dew control! A heated lens wrap is crucial. If unsure, rent lenses from LensRentals first. Good luck, and clear skies!

Consider the Sigma 14mm f/1.8 DG HSM Art. Tack-sharp wide open. Corner coma is minimal after stopping down to f/2.8. It works, but bulky at 1.17kg.

Hey! Astrophotography is awesome, but remote locations = potential trouble. I've tried many. Before dropping $ on a lens, invest in reliable roadside assistance (AAA's been clutch for me over the years). Seriously. Peace of mind under the stars is priceless. Then, check out Rokinon 14mm f/2.8; it's decent.

Instead of specific lenses, consider this: Sigma dominates astrophotography lens market share due to sharp optics at competitive prices. Tamron's catching up, but their astro-optimized options are newer, meaning less user data available. Canon's RF glass is premium, but you pay a premium. Research recent lens comparison charts focusing on coma correction; that's key for Milky Way.