Pentax and 3rd party equivelents

Excuse my ignorance a little here. Just wondering what the closet Pentax fit equivalents to to the lenses below, in terms of focal length, f-stop, and of course sharpness.

Tokina 11-16 2.8 (I think Pentax struggles at the wider end a bit)
Nikon 35mm 1.8 (seen the 31mm 1.8 limited but it's down very slightly on sharpness and is a lot more expensive)
Tamron 17-50 2.8 non VC (I think this one exists in Pentax format)
Nikon 85mm 1.8(70mm 2.4?)


Is there anything out there in Pentax land that matches the Nikon 14-24mm optically? Despite it's 1kg weight and hefty price tag, a quick play with one made it the lens I aspired to get.

Nothing in 2.8 at 11-16 in pentax
35mm 1.8 Pentax 35mm 2.4
Tamron 17-50mm Pentax DA* 16-50mm
85mm 1.8 correct da 70mm 2.4 around the same price point or 77mm limited in Pentax for more cash

The Nikon 12-24mm is an amazing peice of glass and nothing in Pentax yet to match that range and speed, that zoom is also a full frame zoom lens.

Thanks.

Just want to make sure that all/most of my bases are covered.

I am keen for an UWA lens though. I just sold a Sigma 12-24mm so not keen on getting another.

I want something that'll be decent for astro shots.

In terms of third party lenses...

In K mount you can get 10-20 and (I think still) 8-16 from Sigma, although neither are as fast as f2.8. I think the pentax prime 14mm is f2.8:, and there is the limited 15mm (again slower than f2..

Sigma do a 35mm f1.4 in Pentax mount, which gets stellar reviews

Cabstar has covered the 17-50 lengths at f2.8

Sigma also do an 85mm f1.4, which is rather wonderful (I do have one of those), and Pentax previously an did A* and FA* 85mm f1.4 as well, which is discontinued but come up for sale from time to time and are very highly regarded as well

Hope that helps

What about the Samyang 10mm f2.8 or the Sigma 10-20 f3.5? The Pentax 12-24 is similar to the Tokina version but very pricey now. There are rumours about Samyang creating a new AF range tba later this month as well, but the lack of AF may not be such a big deal for wide angle starfields. I am about to put a 10-20 up for sale, but it is not the f3.5 HSM version.

Both the Samyang 14mm f2.8 and 85mm f1.8 are highly regarded, and are 'full' image circle. They recently introduced a 24mm tilt/shift for Pentax, which I am sure will tempt quite a few of us - once FF comes

Except for the wonderful Pentax DA14mm f/2.8

Haha if only it zoomed lol

Well the 11-16mm zoom of the tokina isn't that useful really.

I recently sold a sigma 12-24 and almost exclusively used it at 12mm.

The reason I bought an UWA in the first place was for some crazy perspectives of close foregrounds and massive skies.

I found that 12mm on ASP-C wasn't really that extreme and ended up using it more as a walk around landscape lens.

The 14mm 2.8 would work great for astro stuff though.

Now a 12mm walkaround for landscapes would be challenging! I would benefit from seeing some results of that, as it would really make you think hard about foreground interest.

I'm a fan of a prime for wide - angle (I use a 14mm) - I think its good to have to move to frame, and I felt when looking to buy that there were IQ compromises in the zooms that were within the same budget.

Just lately the Pentax DA 10-17 has had a lot of praise on this forum and some great example shots from it posted - it's quite reasonable in price too!

I can imagine Pentax bringing out a fast 2.8 ultra wide when the ff comes out along with a 24-70mm 2.8 and 70-200mm 2.8

We'll I hope anyhow

So what is a good 'ultra-wide' on FF? Do you mean maybe a 20mm or 21mm prime? Am I right that Pentax had an old 15mm in the film days? If so, wouldn't that just be a ridiculously wide angle on FF? I appreciate that many must have actually used it!

No I am referring to zooms Pentax already have plenty of primes for full frame in their line up already. I can imagine Pentax rebadging one of the tokina ultra wides as they did with the 50-135 and make them slightly better with their coatings and tweaks.

I use a 19-35mm on ff and that is wide, so any zoom under 19mm would be considered ultra wide.

My Sigma 12-24mm is all I need but if its not extreme enough for you then what about the Sigma 8-16 mm?