The 15mm Limited controls my mind - club

juristkostya · 12-16-2017, 03:48 AM - **3 Likes**

Croatia, Rovinj

pakinjapan · 12-17-2017, 04:30 PM - **9 Likes**

DA15 + K5 : Golden river with many star

following.eric · 12-19-2017, 03:45 PM

picked up a second hand 15mm prime and have been out a bit to play with it. love the size and image quality. Whats the lens sweet spot as far as aperture goes? and has anyone else notice a slight lack of sharpness in the left upper quarter of the image? the image seems razor sharp except the upper left quarter, I have notice on some other images in the feed. I never really shoot above f8 when I am out shooting. the ones I have seen on the feed shot at f11 look quite good. any advice on where this lens hits its sweet spot hand held?

northcoastgreg · 12-19-2017, 05:26 PM - **3 Likes**

Originally posted by following.eric

Whats the lens sweet spot as far as aperture goes?

Sweet spot is f8 to f11. It can be a tricky lens to use (copious amounts of field curvature), but is capable of great things.

From Cape Blanco State Park in Oregon, with the KP:

Jonathan Mac · 12-19-2017, 10:31 PM

Ditto - f/8 to f/11 to get the corners sharp but before diffraction really sets in. Sounds like your copy is de-centred if one side is softer than the other. That's something that seems to be quite common on the DA 15mm and something you should check for before buying.

following.eric · 12-20-2017, 02:33 AM

Originally posted by Jonathan Mac

Ditto - f/8 to f/11 to get the corners sharp but before diffraction really sets in. Sounds like your copy is de-centred if one side is softer than the other. That's something that seems to be quite common on the DA 15mm and something you should check for before buying.

couldn't check as I bought it online. If it is de-centered which I am pretty sure it might be on the left side. maybe as much as the left quarter. Is there a fix? a service option? only thing I haven't tried yet is on a tripod playing with different apertures. but all the shots i have so far a f8 are exibiting left side lack of sharpness compared to the right.

Jonathan Mac · 12-20-2017, 11:22 PM

Originally posted by following.eric

couldn't check as I bought it online. If it is de-centered which I am pretty sure it might be on the left side. maybe as much as the left quarter. Is there a fix? a service option? only thing I haven't tried yet is on a tripod playing with different apertures. but all the shots i have so far a f8 are exibiting left side lack of sharpness compared to the right.

As far as I know, de-centred lenses can't be fixed. It should never have left the factory.

I would send it back for a refund if possible and wait for another one to turn up.

following.eric · 12-21-2017, 03:16 AM

Originally posted by Jonathan Mac

As far as I know, de-centred lenses can't be fixed. It should never have left the factory.

I would send it back for a refund if possible and wait for another one to turn up.

bought online from the forum. not sure if there is a return policy!

**BruceBanner** · 12-23-2017, 06:40 PM - **2 Likes**

Festive Beers.

juristkostya · 12-24-2017, 07:10 AM - **1 Like**

Croatia, Rovinj

juristkostya · 12-24-2017, 09:55 AM - **3 Likes**

following.eric · 12-25-2017, 04:12 PM - **1 Like**

Here are a few images shot on the 15mm limited and the k70. I think my lens may has a slight de-centered problem. If varies on it's serverity and maybe some of it is due to pixel peeping. I do know however if I am noticing it on my screen, then I will really notice it in print. The winter ones I think it shows up more than the summer/spring ones below. Let me know if you see it too or if I'm loosing my mind. Left side versus right side. Second image and final image show it the most.

[IMG]

[/IMG]
[IMG]

[/IMG]

**savoche** · 12-28-2017, 04:07 PM

Originally posted by Jonathan Mac

The first of these is a stitched panorama from three shots

Nice! Even the 15 can need stitching from time to time

**savoche** · 12-28-2017, 04:08 PM - **6 Likes**

Re-visited some shots from a few years back. These were taken in Isalo national park, Madagascar.

**BruceBanner** · 12-28-2017, 07:28 PM - **7 Likes**

Glenny Gorge Swirl

The swirling lines in the water are leaves as they leave a trail during a 25 sec exposure.

---------- Post added 12-29-17 at 01:30 PM ----------

Originally posted by savoche

Re-visited some shots from a few years back. These were taken in Isalo national park, Madagascar.

Lovely sun bursts, I don't think my HD DA 15mm is up to that :'(

12-25-2017, 04:12 PM - 1 Like	#10722
following.eric Veteran Member Join Date: Dec 2016 Location: Hertford, UK Photos: Gallery Posts: 319	Here are a few images shot on the 15mm limited and the k70. I think my lens may has a slight de-centered problem. If varies on it's serverity and maybe some of it is due to pixel peeping. I do know however if I am noticing it on my screen, then I will really notice it in print. The winter ones I think it shows up more than the summer/spring ones below. Let me know if you see it too or if I'm loosing my mind. Left side versus right side. Second image and final image show it the most. [IMG][/IMG] [IMG][/IMG] [IMG][/IMG] [IMG][/IMG]

12-28-2017, 07:28 PM - 7 Likes	#10725
BruceBanner Site Supporter Join Date: Dec 2015 Posts: 5,404	Glenny Gorge Swirl The swirling lines in the water are leaves as they leave a trail during a 25 sec exposure. ---------- Post added 12-29-17 at 01:30 PM ---------- Originally posted by savoche Re-visited some shots from a few years back. These were taken in Isalo national park, Madagascar. Lovely sun bursts, I don't think my HD DA 15mm is up to that :'( Last edited by BruceBanner; 12-30-2017 at 02:36 PM.

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following.eric Veteran Member Join Date: Dec 2016 Location: Hertford, UK Photos: Gallery Posts: 319	picked up a second hand 15mm prime and have been out a bit to play with it. love the size and image quality. Whats the lens sweet spot as far as aperture goes? and has anyone else notice a slight lack of sharpness in the left upper quarter of the image? the image seems razor sharp except the upper left quarter, I have notice on some other images in the feed. I never really shoot above f8 when I am out shooting. the ones I have seen on the feed shot at f11 look quite good. any advice on where this lens hits its sweet spot hand held?

12-19-2017, 05:26 PM - 3 Likes	#10714
northcoastgreg Pentaxian Join Date: Feb 2010 Location: Northern Michigan Photos: Gallery \| Albums Posts: 6,173	Originally posted by following.eric Whats the lens sweet spot as far as aperture goes? Sweet spot is f8 to f11. It can be a tricky lens to use (copious amounts of field curvature), but is capable of great things. From Cape Blanco State Park in Oregon, with the KP:

12-19-2017, 10:31 PM	#10715
Jonathan Mac Pentaxian Join Date: Apr 2009 Location: Madrid, Spain Posts: 10,894	Ditto - f/8 to f/11 to get the corners sharp but before diffraction really sets in. Sounds like your copy is de-centred if one side is softer than the other. That's something that seems to be quite common on the DA 15mm and something you should check for before buying.

12-20-2017, 02:33 AM	#10716
following.eric Veteran Member Join Date: Dec 2016 Location: Hertford, UK Photos: Gallery Posts: 319	Originally posted by Jonathan Mac Ditto - f/8 to f/11 to get the corners sharp but before diffraction really sets in. Sounds like your copy is de-centred if one side is softer than the other. That's something that seems to be quite common on the DA 15mm and something you should check for before buying. couldn't check as I bought it online. If it is de-centered which I am pretty sure it might be on the left side. maybe as much as the left quarter. Is there a fix? a service option? only thing I haven't tried yet is on a tripod playing with different apertures. but all the shots i have so far a f8 are exibiting left side lack of sharpness compared to the right.

12-20-2017, 11:22 PM	#10717
Jonathan Mac Pentaxian Join Date: Apr 2009 Location: Madrid, Spain Posts: 10,894	Originally posted by following.eric couldn't check as I bought it online. If it is de-centered which I am pretty sure it might be on the left side. maybe as much as the left quarter. Is there a fix? a service option? only thing I haven't tried yet is on a tripod playing with different apertures. but all the shots i have so far a f8 are exibiting left side lack of sharpness compared to the right. As far as I know, de-centred lenses can't be fixed. It should never have left the factory. I would send it back for a refund if possible and wait for another one to turn up.

12-21-2017, 03:16 AM	#10718
following.eric Veteran Member Join Date: Dec 2016 Location: Hertford, UK Photos: Gallery Posts: 319	Originally posted by Jonathan Mac As far as I know, de-centred lenses can't be fixed. It should never have left the factory. I would send it back for a refund if possible and wait for another one to turn up. bought online from the forum. not sure if there is a return policy!

12-23-2017, 06:40 PM - 2 Likes	#10719
BruceBanner Site Supporter Join Date: Dec 2015 Posts: 5,404	Festive Beers.

12-24-2017, 07:10 AM - 1 Like	#10720
juristkostya Pentaxian Join Date: Apr 2016 Location: Ukraine, Kharkov Posts: 1,225	Croatia, Rovinj

12-24-2017, 09:55 AM - 3 Likes	#10721
juristkostya Pentaxian Join Date: Apr 2016 Location: Ukraine, Kharkov Posts: 1,225

12-28-2017, 04:07 PM	#10723
savoche Master of the obvious Join Date: Jun 2011 Location: Lowlands of Norway Posts: 18,311	Originally posted by Jonathan Mac The first of these is a stitched panorama from three shots Nice! Even the 15 can need stitching from time to time

12-28-2017, 04:08 PM - 6 Likes	#10724
savoche Master of the obvious Join Date: Jun 2011 Location: Lowlands of Norway Posts: 18,311	Re-visited some shots from a few years back. These were taken in Isalo national park, Madagascar.

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