Pentax and 3rd party equivelents


mikedefieslife

Link Posted 26/04/2014 - 10:06
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.
Last Edited by mikedefieslife on 26/04/2014 - 10:07

cabstar

Link Posted 26/04/2014 - 10:40
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.
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Currently on a Pentax hiatus until an FF Pentax is released
Last Edited by cabstar on 26/04/2014 - 10:41

mikedefieslife

Link Posted 26/04/2014 - 10:44
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.

matwhittington

Link Posted 26/04/2014 - 12:12
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
Mat W

My Flickr: link

ambient housewife

Link Posted 26/04/2014 - 12:42
mikedefieslife wrote:
I want something that'll be decent for astro shots.

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.

McGregNi

Link Posted 26/04/2014 - 13:20
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
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

Smeggypants

Link Posted 27/04/2014 - 00:26
cabstar wrote:
Nothing in 2.8 at 11-16 in pentax

Except for the wonderful Pentax DA14mm f/2.8





[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283

cabstar

Link Posted 27/04/2014 - 02:17
Smeggypants wrote:
cabstar wrote:
Nothing in 2.8 at 11-16 in pentax

Except for the wonderful Pentax DA14mm f/2.8





Haha if only it zoomed lol
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Currently on a Pentax hiatus until an FF Pentax is released

mikedefieslife

Link Posted 27/04/2014 - 03:24
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.
Last Edited by mikedefieslife on 27/04/2014 - 03:25

McGregNi

Link Posted 27/04/2014 - 08:36
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.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

jemx99

Link Posted 27/04/2014 - 09:28
mikedefieslife wrote:
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.

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!

cabstar

Link Posted 27/04/2014 - 13:48
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
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Concert photography

Currently on a Pentax hiatus until an FF Pentax is released

McGregNi

Link Posted 27/04/2014 - 14:26
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!
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
Last Edited by McGregNi on 27/04/2014 - 14:29

cabstar

Link Posted 27/04/2014 - 14:43
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.
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Concert photography

Currently on a Pentax hiatus until an FF Pentax is released

Mike-P

Link Posted 27/04/2014 - 15:19
My Sigma 12-24mm is all I need but if its not extreme enough for you then what about the Sigma 8-16 mm?
. My Flickr
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