My camera is Canon 6D Mk 2 (full frame). I already have Canon 24-70mm f/4 and Tamron 70-210mm f/4 lenses and I'm planning to get a landscape lens in the range of 10-24mm. I want to shoot astro photos and normal landscape photos as well. I am leaning towards a f/2.8 lense due to the interest in astro photography. I liked what I saw in Tamron 15-30 f/2.8 but it needs external filter kit which is expensive. Canon 16-35 f/4 again looks decent but f/4 is worrying me due to my interest in astro photography. Can anyone help me to sort this out? I am open to other brands out of Canon as well. I loved my tamron 70-210.

My camera is Canon 6D Mk 2 (full frame). I already have Canon 24–70 mm f/4 and Tamron 70–210 mm f/4 lenses and I'm planning to get a landscape lens in the range of 10–24 mm. I want to shoot astro photos and normal landscape photos as well. I am leaning towards a f/2.8 lens due to the interest in astro photography. I liked what I saw in Tamron 15–30 mm f/2.8 but it needs external filter kit which is expensive. Canon 16–35 mm f/4 again looks decent, but f/4 is worrying me due to my interest in astro photography. Can anyone help me to sort this out? I am open to other brands out of Canon as well. I loved my Tamron 70-210mm.

My camera is Canon 6D Mk 2 full frame. I already have 24-70 F4(canon) and 70-210 f4 (tamron) lenses and planning to get a landscape lense (in the range of 10-24). I want to take astro photos and normal landscape photos as well. I am leaning towards a F 2.8 lense due to the interest in astro photography. Liked what I saw in Tamron 15-30 f2.8 but it needs external filter kit which is expensive. Canon 16-35 F4 again looks decent but F4 is worrying me due to my interest in astro photography.Can anyone help me to sort this out? I am open to other brands out of canon as well. I loved my tamron 70-210.

My camera is Canon 6D Mk 2 (full frame). I already have Canon 24-70mm f/4 and Tamron 70-210mm f/4 lenses and I'm planning to get a landscape lens in the range of 10-24mm. I want to shoot astro photos and normal landscape photos as well. I am leaning towards a f/2.8 lense due to the interest in astro photography. I liked what I saw in Tamron 15-30 f/2.8 but it needs external filter kit which is expensive. Canon 16-35 f/4 again looks decent but f/4 is worrying me due to my interest in astro photography. Can anyone help me to sort this out? I am open to other brands out of Canon as well. I loved my tamron 70-210.