Is there a high quality compact prime around 17-18mm for K1?

peterh337 · 12-31-2016, 01:08 PM

I can see some FF primes but they are not small. In my film days (OM1/OM2/OM4) I had a very compact 17mm... it was not cheap; £250 in 1985, used. It was about the widest lens that preserved straight lines.

I was looking at the 15-30 FA but at over 1kg it is even more massive than my 24-70 f2.8 and since it would be relatively rarely used I am not going to haul a 1kg lens around.

**bobbotron** · 12-31-2016, 01:14 PM

You could check out the Zenit 16mm, they are quite compact and FF.

**pepperberry farm** · 12-31-2016, 01:16 PM - **1 Like**

if you are looking at used, there's the Tamron Adaptall-2 151B - all 17mm of it... Tokina did a 17mm also....

but new - you're looking at Samyang, Irix....

**clackers** · 12-31-2016, 01:28 PM

Originally posted by bobbotron

You could check out the Zenit 16mm, they are quite compact and FF.

It's a fisheye, no?

**bobbotron** · 12-31-2016, 01:54 PM

Yeah, iq is quite good, would probably defish well.

civiletti · 12-31-2016, 02:15 PM

Older wide angle lenses often work poorly on digital because of the low angle with which light hits the sensor edges.

peterh337 · 12-31-2016, 02:54 PM

Samyang don't seem to do anything that's full frame. They do this one
Samyang 16mm F2.0 ED UMC CS Lens - Pentax Fit

Cthulhugan · 12-31-2016, 02:59 PM

The Samyang 16/2.0 is APS-C, but the 14/2.8 is full frame. They are manual focus, though.

BROO · 12-31-2016, 03:03 PM

I picked up a second hand Tokina 17mm RMC . I am quite happy with it. Maybe not top shelf but adequate for landscape and interior photography. I would rate it similar to my Pentax K24/f3.5 in optical quality and size.

**i_trax** · 12-31-2016, 03:04 PM

Originally posted by peterh337

Samyang don't seem to do anything that's full frame. They do this one
Samyang 16mm F2.0 ED UMC CS Lens - Pentax Fit

I have Samyang /Rokinon 14mm 2.8 , it is FF with PKA mount, love it!

peterh337 · 12-31-2016, 04:03 PM

14mm is pretty wide... a rather "special purpose" lens. Even landscapes look slightly un-natural at 14mm.

DeadJohn · 12-31-2016, 09:36 PM

I don't think anyone makes a new 17-18mm for the K mount.

Samyang/Rokinon/Bower has wider or longer lenses, but they emphasize fast aperture and sharpness rather than compactness. Their 20/1.8 and 14/2.8 weigh in the 0.5 kg range (the 16mm is not FF).

**Alex645** · 12-31-2016, 09:40 PM - **1 Like**

Originally posted by peterh337

14mm is pretty wide... a rather "special purpose" lens. Even landscapes look slightly un-natural at 14mm.

IMO anything wider than 20mm for FF is extreme. I agree that the Pentax 15-30mm f/2.8 is a bit of a heavyweight and slow as would be expected with 18 elements in 13 groups, the SDM AF motor, plus WR seals. Would LOVE to see an AF FF 20mm f/1.8 prime under 400g. No doubt itʻs on the lens map, so until then itʻs the Rokinon MF 20mm f/1.8 which is nearly 500g.

Are you sure you want 17-18mm for the K1?

**bobbotron** · 12-31-2016, 11:04 PM

Originally posted by Alex645

IMO anything wider than 20mm for FF is extreme. I agree that the Pentax 15-30mm f/2.8 is a bit of a heavyweight and slow as would be expected with 18 elements in 13 groups, the SDM AF motor, plus WR seals. Would LOVE to see an AF FF 20mm f/1.8 prime under 400g. No doubt itʻs on the lens map, so until then itʻs the Rokinon MF 20mm f/1.8 which is nearly 500g.

Are you sure you want 17-18mm for the K1?

I would second this, it is a very wide field of view.

**Digitalis** · 01-01-2017, 01:08 AM

Originally posted by Alex645

. Would LOVE to see an AF FF 20mm f/1.8 prime under 400g

Under 400g? HA! If pentax ever makes a 20mm f/1.8 will weigh in the vicinity of 500~700g. Personal;ly I'd prefer it to be heavier, as weight is indicative* that there are more corrective elements in use in the optical design - which are a necessity with wide angle lenses to reduce coma,astigmatism, controlling field curvature which all become increasingly problematic with wide lenses

*but by no means a infallible indicator

12-31-2016, 01:08 PM	#1
peterh337 Veteran Member Join Date: Jan 2009 Location: London Posts: 573	Is there a high quality compact prime around 17-18mm for K1? I can see some FF primes but they are not small. In my film days (OM1/OM2/OM4) I had a very compact 17mm... it was not cheap; £250 in 1985, used. It was about the widest lens that preserved straight lines. I was looking at the 15-30 FA but at over 1kg it is even more massive than my 24-70 f2.8 and since it would be relatively rarely used I am not going to haul a 1kg lens around.

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12-31-2016, 01:14 PM	#2
bobbotron Site Supporter Join Date: Jan 2015 Location: Ottawa, ON Photos: Gallery Posts: 3,349	You could check out the Zenit 16mm, they are quite compact and FF.

12-31-2016, 01:16 PM - 1 Like	#3
pepperberry farm amateur dirt farmer Join Date: Dec 2014 Location: probably out in a field somewhere... Photos: Gallery \| Albums Posts: 41,659	if you are looking at used, there's the Tamron Adaptall-2 151B - all 17mm of it... Tokina did a 17mm also.... but new - you're looking at Samyang, Irix....

12-31-2016, 01:28 PM	#4
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by bobbotron You could check out the Zenit 16mm, they are quite compact and FF. It's a fisheye, no?

12-31-2016, 01:54 PM	#5
bobbotron Site Supporter Join Date: Jan 2015 Location: Ottawa, ON Photos: Gallery Posts: 3,349	Yeah, iq is quite good, would probably defish well.

12-31-2016, 02:15 PM	#6
civiletti Pentaxian Join Date: Jul 2010 Location: Oregon Photos: Albums Posts: 1,435	Older wide angle lenses often work poorly on digital because of the low angle with which light hits the sensor edges.

12-31-2016, 02:54 PM	#7
peterh337 Veteran Member Join Date: Jan 2009 Location: London Posts: 573 Original Poster	Samyang don't seem to do anything that's full frame. They do this one Samyang 16mm F2.0 ED UMC CS Lens - Pentax Fit

12-31-2016, 02:59 PM	#8
Cthulhugan Senior Member Join Date: Dec 2015 Location: Calgary Alberta Canada Photos: Gallery Posts: 227	The Samyang 16/2.0 is APS-C, but the 14/2.8 is full frame. They are manual focus, though.

12-31-2016, 03:03 PM	#9
BROO Veteran Member Join Date: Feb 2016 Photos: Gallery \| Albums Posts: 655	I picked up a second hand Tokina 17mm RMC . I am quite happy with it. Maybe not top shelf but adequate for landscape and interior photography. I would rate it similar to my Pentax K24/f3.5 in optical quality and size.

12-31-2016, 03:04 PM	#10
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621	Originally posted by peterh337 Samyang don't seem to do anything that's full frame. They do this one Samyang 16mm F2.0 ED UMC CS Lens - Pentax Fit I have Samyang /Rokinon 14mm 2.8 , it is FF with PKA mount, love it!

12-31-2016, 04:03 PM	#11
peterh337 Veteran Member Join Date: Jan 2009 Location: London Posts: 573 Original Poster	14mm is pretty wide... a rather "special purpose" lens. Even landscapes look slightly un-natural at 14mm.

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12-31-2016, 09:36 PM	#12
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,833	I don't think anyone makes a new 17-18mm for the K mount. Samyang/Rokinon/Bower has wider or longer lenses, but they emphasize fast aperture and sharpness rather than compactness. Their 20/1.8 and 14/2.8 weigh in the 0.5 kg range (the 16mm is not FF).

12-31-2016, 09:40 PM - 1 Like	#13
Alex645 Site Supporter Join Date: May 2015 Location: Kaneohe, HI Photos: Albums Posts: 3,526	Originally posted by peterh337 14mm is pretty wide... a rather "special purpose" lens. Even landscapes look slightly un-natural at 14mm. IMO anything wider than 20mm for FF is extreme. I agree that the Pentax 15-30mm f/2.8 is a bit of a heavyweight and slow as would be expected with 18 elements in 13 groups, the SDM AF motor, plus WR seals. Would LOVE to see an AF FF 20mm f/1.8 prime under 400g. No doubt itʻs on the lens map, so until then itʻs the Rokinon MF 20mm f/1.8 which is nearly 500g. Are you sure you want 17-18mm for the K1?

12-31-2016, 11:04 PM	#14
bobbotron Site Supporter Join Date: Jan 2015 Location: Ottawa, ON Photos: Gallery Posts: 3,349	Originally posted by Alex645 IMO anything wider than 20mm for FF is extreme. I agree that the Pentax 15-30mm f/2.8 is a bit of a heavyweight and slow as would be expected with 18 elements in 13 groups, the SDM AF motor, plus WR seals. Would LOVE to see an AF FF 20mm f/1.8 prime under 400g. No doubt itʻs on the lens map, so until then itʻs the Rokinon MF 20mm f/1.8 which is nearly 500g. Are you sure you want 17-18mm for the K1? I would second this, it is a very wide field of view.

01-01-2017, 01:08 AM	#15
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by Alex645 . Would LOVE to see an AF FF 20mm f/1.8 prime under 400g Under 400g? HA! If pentax ever makes a 20mm f/1.8 will weigh in the vicinity of 500~700g. Personal;ly I'd prefer it to be heavier, as weight is indicative* that there are more corrective elements in use in the optical design - which are a necessity with wide angle lenses to reduce coma,astigmatism, controlling field curvature which all become increasingly problematic with wide lenses *but by no means a infallible indicator