Best wide angle lens for K-1?

**MASTERFIRE** · 03-06-2019, 09:42 PM

Originally posted by cmohr

HD Pentax-D FA 24-70mm F2.8 ED SDM WR is the FF equivalent in angle of view to the 16-50 with is a APS-C lens.

There is NO manufactureererer , Nikon, Canon, Sigma, Tokina that offers a Full Frame Lens, from ultra wide to standard focal length, the possible closest would be the Canon EF 17-40mm F4.

You've provided the best answer yet to someone that "can't read?" lens designations from PENTAX...well sorta, but it can be confusing. I am going to take your advice and start looking for the 24-70 APS. I've gotta have at least 17mm wide fl on my K 1 to shoot how I like...and then the versatility of a more standard fl. Going from a WA landscape to a close up citizen (whatever) on the fly is not unusual. People and animals are around and make for good takes. Thanks! BTW, (my ignorance is showing again) Who makes PENTAX glass?...PENTAX? Hoya makes the most glass in the world--ground to spec for a number of makers. CANON grinds their own--or so I understand. Any knowledge about what is sometimes proprietary info?

**clackers** · 03-06-2019, 10:01 PM - **1 Like**

Originally posted by MASTERFIRE

I've gotta have at least 17mm wide fl on my K 1 to shoot how I like

Right, and you realize that the K-1 has a full frame sensor that is twice as big in area as any APS-C camera you've shot with before?

Because of that, the same field of view is achieved with around a 24mm focal length, so keep that in mind when you on a spending spree!

It is no accident that a 'standard' zoom on FF like Pentax, Canon and Nikon is 24-70mm, not 16-50.

**MASTERFIRE** · 03-08-2019, 01:02 PM

Originally posted by clackers

Right, and you realize that the K-1 has a full frame sensor that is twice as big in area as any APS-C camera you've shot with before?

Because of that, the same field of view is achieved with around a 24mm focal length, so keep that in mind when you on a spending spree!

It is no accident that a 'standard' zoom on FF like Pentax, Canon and Nikon is 24-70mm, not 16-50.

No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish.

**clackers** · 03-08-2019, 01:21 PM - **1 Like**

Originally posted by MASTERFIRE

No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish.

I have this awful feeling - correct me if I'm wrong - that with all this continuing talk about 17mm - you still don't understand what's been explained to you.

17mm on a K-1 is ridiculously wider than on a K-70.

The usage is entirely different from the 50mm example.

Your Canon and Nikon friends will tell you exactly the same.

pschlute · 03-08-2019, 03:39 PM

Originally posted by MASTERFIRE

Why is PENTAX not producing a lens equivalent to their DA* (star) 16-50mm f/2.8 AL SDM

They are. it is called the D-FA 24-70 f2.8

---------- Post added 03-08-19 at 10:44 PM ----------

Originally posted by MASTERFIRE

and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm

17mm is an Ultra-wide lens, not what one would call a "landscape lens" like a 20/24/28 mm

17-50mm zoom is possible, if you want to sacrifice IQ. Pentax take a different view. They have a 15-30 Zoom, and a 24-70 zoom. They produce lenses that produce the optical results folk want, not lenses that are "convenient"

**felixkh** · 03-10-2019, 08:17 PM

Originally posted by MASTERFIRE

No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish.

You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele.

The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA*16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . .

For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm.

For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use.

I believe that the other have been trying to explain to you the difference already.

Cheers!

**MASTERFIRE** · 03-11-2019, 11:40 PM

Originally posted by felixkh

You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele.

The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA*16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . .

For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm.

For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use.

I believe that the other have been trying to explain to you the difference already.

Cheers!

Understand what a full frame K 1 is capable of, but not totally familiar with lens/sensor science. I made a mistake purchasing the DA 16-50...refund of money done, lesson learned...I'll save up for the 24-70...it will be awhile. However, what I want are lenses made with only the K1 in mind ...Thank you.

**clackers** · 03-12-2019, 12:00 AM

Originally posted by MASTERFIRE

Understand what a full frame K 1 is capable of, but not totally familiar with lens/sensor science. I made a mistake purchasing the DA 16-50...refund of money done, lesson learned...I'll save up for the 24-70...it will be awhile. However, what I want are lenses made with only the K1 in mind ...Thank you.

It'll be worth the wait, MF, all the best.

niblue · 03-12-2019, 01:05 AM

I cover wide angle with my K1 using a few lenses. My standard lens is a 24-70mm F2.8 (the Sigma one), because 24mm is perhaps my favourite focal length. For wider than that I have couple of Tokina's - one is the 20-35mm F2.8 (which is great) and the other is a consumer spec 19-35. (which is surprisingly decent) If I want to go really wide I've got 14mm primes - originally the Sigma F2.8 (which is rubbish) and now the Samyang 14mm F2.8.

On APS-C I used to use a Sigma 10-20mm and that was very decent as well as being pretty wide (15-30mm equivalent on full-frame). I'd quite like an equivalent to that range on FF to save a bit of lens switching - but I'm not quite ready yet to drop the cash on the Pentax 15-30.

**Merv-O** · 03-12-2019, 06:24 AM

Uncropped example of this lens at 12mm on the K-1 (ignore the exif data--SIGMA is well known for not properly data coding individual lenses). Wide open with the diffuser hood off. A little soft in the corners, but generally pleasant and this was done in my den (note the PF screen on the computer--sharp & clear).

I recommend this lens even though it is not particularly fast because it images nicely on the K-1 series, is quiet, focuses fast, plus its smaller size and relatively light weight for its range makes the K-1 much more totable.

**Merv-O** · 03-12-2019, 06:33 AM

Originally posted by clackers

It'll be worth the wait, MF, all the best.

Agree: I have the Tamron version (28-75mm f/2.8) and like its speed and smooth quiet motor--a great value...sometimes a bit soft, but many telephotos of mid-length are, regardless of manufacture. An example below:

**MASTERFIRE** · 03-12-2019, 06:54 PM

Originally posted by clackers

It'll be worth the wait, MF, all the best.

Thank you!

---------- Post added 03-12-19 at 07:00 PM ----------

Originally posted by felixkh

You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele.

The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA*16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . .

For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm.

For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use.

I believe that the other have been trying to explain to you the difference already.

Cheers!

Thanks A lot!!!

**felixkh** · 03-12-2019, 10:13 PM

Originally posted by MASTERFIRE

Thank you!

---------- Post added 03-12-19 at 07:00 PM ----------

Thanks A lot!!!

You're welcome. I hope you get the DFA24-70/2.8 or the Tamron 28-75/2.8 is also not a bad deal. 4mm difference on the wide end. If you can get your hands on thePentax FA*28-70/2.8, it is also very usable on the K1. There are a few in Singapore who use the FA*28-70/2.8 with the K1.

niblue · 03-13-2019, 01:37 AM

Originally posted by felixkh

You're welcome. I hope you get the DFA24-70/2.8 or the Tamron 28-75/2.8 is also not a bad deal. 4mm difference on the wide end.

That 4mm difference is a big one for me and I find a 24-70 a lot more useful than a 28-75. The Sigma 24-70mm F2.8 is a decent alternative to the Pentax lens and can be found a lot cheaper - I paid £199 for mine.

wanderer2 · 03-13-2019, 03:46 AM

Originally posted by Merv-O

Agree: I have the Tamron version (28-75mm f/2.8) and like its speed and smooth quiet motor--a great value...sometimes a bit soft, but many telephotos of mid-length are, regardless of manufacture. An example below:

I also have the Tamron 28-75 and have found it to be a very useful and capable lens. Also, it's macro performance is surprising, at least to me.

03-06-2019, 10:01 PM - 1 Like	#392
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by MASTERFIRE I've gotta have at least 17mm wide fl on my K 1 to shoot how I like Right, and you realize that the K-1 has a full frame sensor that is twice as big in area as any APS-C camera you've shot with before? Because of that, the same field of view is achieved with around a 24mm focal length, so keep that in mind when you on a spending spree! It is no accident that a 'standard' zoom on FF like Pentax, Canon and Nikon is 24-70mm, not 16-50. Last edited by clackers; 03-06-2019 at 10:30 PM.

03-10-2019, 08:17 PM	#396
felixkh Site Supporter Join Date: Nov 2008 Location: Singapore Photos: Gallery Posts: 1,201	Originally posted by MASTERFIRE No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish. You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele. The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . . For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm. For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use. I believe that the other have been trying to explain to you the difference already. Cheers! Last edited by felixkh; 03-10-2019 at 08:27 PM.*

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03-06-2019, 09:42 PM	#391
MASTERFIRE Site Supporter Join Date: Aug 2017 Photos: Gallery Posts: 327	Originally posted by cmohr HD Pentax-D FA 24-70mm F2.8 ED SDM WR is the FF equivalent in angle of view to the 16-50 with is a APS-C lens. There is NO manufactureererer , Nikon, Canon, Sigma, Tokina that offers a Full Frame Lens, from ultra wide to standard focal length, the possible closest would be the Canon EF 17-40mm F4. You've provided the best answer yet to someone that "can't read?" lens designations from PENTAX...well sorta, but it can be confusing. I am going to take your advice and start looking for the 24-70 APS. I've gotta have at least 17mm wide fl on my K 1 to shoot how I like...and then the versatility of a more standard fl. Going from a WA landscape to a close up citizen (whatever) on the fly is not unusual. People and animals are around and make for good takes. Thanks! BTW, (my ignorance is showing again) Who makes PENTAX glass?...PENTAX? Hoya makes the most glass in the world--ground to spec for a number of makers. CANON grinds their own--or so I understand. Any knowledge about what is sometimes proprietary info?

03-08-2019, 01:02 PM	#393
MASTERFIRE Site Supporter Join Date: Aug 2017 Photos: Gallery Posts: 327	Originally posted by clackers Right, and you realize that the K-1 has a full frame sensor that is twice as big in area as any APS-C camera you've shot with before? Because of that, the same field of view is achieved with around a 24mm focal length, so keep that in mind when you on a spending spree! It is no accident that a 'standard' zoom on FF like Pentax, Canon and Nikon is 24-70mm, not 16-50. No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish.

03-08-2019, 01:21 PM - 1 Like	#394
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by MASTERFIRE No shopping spree now...I'll keep my Sigma 17-35 Aspherical for now and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm (give or take) when timing is often everything where people, wildlife, and domestic animals are around. I purchased a K1 not to crop, but to take the best images my abilities and equipment can accomplish. I have this awful feeling - correct me if I'm wrong - that with all this continuing talk about 17mm - you still don't understand what's been explained to you. 17mm on a K-1 is ridiculously wider than on a K-70. The usage is entirely different from the 50mm example. Your Canon and Nikon friends will tell you exactly the same.

03-08-2019, 03:39 PM	#395
pschlute Moderator Loyal Site Supporter Join Date: Mar 2007 Location: Surrey, UK Photos: Gallery Posts: 8,202	Originally posted by MASTERFIRE Why is PENTAX not producing a lens equivalent to their DA* (star) 16-50mm f/2.8 AL SDM They are. it is called the D-FA 24-70 f2.8 ---------- Post added 03-08-19 at 10:44 PM ---------- Originally posted by MASTERFIRE and wonder forever why PENTAX does not offer a lens for K 1 users who want the versatility of a landscape friendly fl of 17mm (give or take) with zoom capability to make images with a more standard fl of 50 mm 17mm is an Ultra-wide lens, not what one would call a "landscape lens" like a 20/24/28 mm 17-50mm zoom is possible, if you want to sacrifice IQ. Pentax take a different view. They have a 15-30 Zoom, and a 24-70 zoom. They produce lenses that produce the optical results folk want, not lenses that are "convenient"

03-11-2019, 11:40 PM	#397
MASTERFIRE Site Supporter Join Date: Aug 2017 Photos: Gallery Posts: 327	Originally posted by felixkh You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele. The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA*16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . . For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm. For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use. I believe that the other have been trying to explain to you the difference already. Cheers! Understand what a full frame K 1 is capable of, but not totally familiar with lens/sensor science. I made a mistake purchasing the DA 16-50...refund of money done, lesson learned...I'll save up for the 24-70...it will be awhile. However, what I want are lenses made with only the K1 in mind ...Thank you.

03-12-2019, 12:00 AM	#398
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	Originally posted by MASTERFIRE Understand what a full frame K 1 is capable of, but not totally familiar with lens/sensor science. I made a mistake purchasing the DA 16-50...refund of money done, lesson learned...I'll save up for the 24-70...it will be awhile. However, what I want are lenses made with only the K1 in mind ...Thank you. It'll be worth the wait, MF, all the best.

03-12-2019, 01:05 AM	#399
niblue Senior Member Join Date: Nov 2018 Posts: 181	I cover wide angle with my K1 using a few lenses. My standard lens is a 24-70mm F2.8 (the Sigma one), because 24mm is perhaps my favourite focal length. For wider than that I have couple of Tokina's - one is the 20-35mm F2.8 (which is great) and the other is a consumer spec 19-35. (which is surprisingly decent) If I want to go really wide I've got 14mm primes - originally the Sigma F2.8 (which is rubbish) and now the Samyang 14mm F2.8. On APS-C I used to use a Sigma 10-20mm and that was very decent as well as being pretty wide (15-30mm equivalent on full-frame). I'd quite like an equivalent to that range on FF to save a bit of lens switching - but I'm not quite ready yet to drop the cash on the Pentax 15-30.

03-12-2019, 06:54 PM	#402
MASTERFIRE Site Supporter Join Date: Aug 2017 Photos: Gallery Posts: 327	Originally posted by clackers It'll be worth the wait, MF, all the best. Thank you! ---------- Post added 03-12-19 at 07:00 PM ---------- Originally posted by felixkh You look like someone who was using a crop sensor camera body BEFORE the K1. The K1 is a Full Frame camera, thus they do have UWA DFA 15-30/2.8 and the normal DFA 24-70/2.8 lenses to cover Ultra wide to short tele. The DFA 15-30 is 2mm wider than the Sigma 17-35. The DA*16-50/2.8 is a crop sensor lens and is NOT usable on the K1. In 35mm FF terms the lens FL translates to 24 - 75mm thereabouts on the K3, K5, K7, K30, K50, K70, KP, etc. . . For the Sigma 17-35 on a K70 the FL is 25.5mm to 52.5mm. When you put the Sigma on to the K1, 17mm is 17mm and 35mm is 35mm. For myself, I have the Samyang 14/2.8 for ultra wide and the DFA24-70 for normal use. I believe that the other have been trying to explain to you the difference already. Cheers! Thanks A lot!!!

03-12-2019, 10:13 PM	#403
felixkh Site Supporter Join Date: Nov 2008 Location: Singapore Photos: Gallery Posts: 1,201	Originally posted by MASTERFIRE Thank you! ---------- Post added 03-12-19 at 07:00 PM ---------- Thanks A lot!!! You're welcome. I hope you get the DFA24-70/2.8 or the Tamron 28-75/2.8 is also not a bad deal. 4mm difference on the wide end. If you can get your hands on thePentax FA28-70/2.8, it is also very usable on the K1. There are a few in Singapore who use the FA28-70/2.8 with the K1.

03-13-2019, 01:37 AM	#404
niblue Senior Member Join Date: Nov 2018 Posts: 181	Originally posted by felixkh You're welcome. I hope you get the DFA24-70/2.8 or the Tamron 28-75/2.8 is also not a bad deal. 4mm difference on the wide end. That 4mm difference is a big one for me and I find a 24-70 a lot more useful than a 28-75. The Sigma 24-70mm F2.8 is a decent alternative to the Pentax lens and can be found a lot cheaper - I paid £199 for mine.

03-13-2019, 03:46 AM	#405
wanderer2 Veteran Member Join Date: Jul 2016 Posts: 301	Originally posted by Merv-O Agree: I have the Tamron version (28-75mm f/2.8) and like its speed and smooth quiet motor--a great value...sometimes a bit soft, but many telephotos of mid-length are, regardless of manufacture. An example below: I also have the Tamron 28-75 and have found it to be a very useful and capable lens. Also, it's macro performance is surprising, at least to me.