All in 1 or 2 lenses? What to buy.....

Hello
I am looking for a wide-angle zoom that delivers both landscapes and astro photography. I have previously stayed at f4 lens but at astrophotography it will not be optimal. I will now buy a wide-angle zoom lens.

The question is ... which solution is the best?

alt.1
Tamron 15-30 / 2.8 VC who now also have third-party solutions for filter
Price: 1090 USD

alt.2
Canon EF 16-35mm f / 4L IS + Used Rokinon 14 / 2.8
Price: 1250 USD

I have no problem with the weight or size of Tamron.
My bag is not too big so the fewer lenses the better.

I would go with the 14 and 16-35. I've heard nothing but rave reviews for them within the genres you're looking for.

For astro photography.. I wouldn't go with a zoom. Corner softness and comma's will be more noticeable on a zoom. The sigma art 35mm for $800 is probably a great pick for a 1.4 lens. Prime is the way to go for astro and better corner sharpness on landscapes. JMHO.

Heya,

On a full frame, for wide, I'd go with the Samyang 24mm F1.4 manual lens. Best performance and best coma control. It's plenty wide for milky way size objects and sky.

If you need ultrawide, then the Rokinon 14mm F2.8 is the way to go.

If you feel you need an ultrawide zoom, that's fine, but it's coma is going to be pretty noticeable. And really, do you need 16, 17, 18, 19mm? You know? When you really could just have 14mm and 24mm and be done with ultrawide to wide, with the better overall performance in terms of nightsky (coma especially) for less than $700 USD for both.

Beyond that, if you want less lenses, just get a tracker and use any lens you want. Cheaper and ultimately does more.

Very best,

In a week or so, Sigma's 20mm f/1.4 Art lens should be released. Looks good for astro work to me.

+1 for option 2. Also easier to use polarizers for landscapes with the 16-35. Astro with the 14.

I don't do astro, but isn't f/2.8 considered kind of slow by those who do? Seems to me that if you are shooting at ISO 3200-6400 just to keep the shutter speed as fast as possible, the difference between f/2.8 and f/1.4 is really large.