Pentax SMC-DA 14mm f/2.8 ED [IF] Is suddenly recording a dark centre in my frames.

aitrus3 · 07-20-2016, 12:11 PM

I hve the Pentax 14mm f2.8 and it is suddenly recording a dark centre in all my frames. Has anyone experienced this? I don't think it's dirty but will do a thorough cleaning tonight.
Thanks!
go to this link to see the image and a couple others in the thread.

https://www.facebook.com/photo.php?fbid=10157133378780655&set=gm.10153731802...type=3&theater

**W.j.christy** · 07-20-2016, 12:26 PM

You wouldn't happen to have a variable ND filter on the front would you?

Giklab · 07-20-2016, 02:18 PM

Check if something had found its way onto the back of the lens.

Na Horuk · 07-20-2016, 02:27 PM

Check front and back of lens to make sure they are clean. Especially the back element. Also, look inside of the lens, maybe with a flashlight, to check if there is anything odd inside.
Are you shooting raw or jpeg? Lens profiles, either in-camera for jpeg or in raw software, can do all sorts of things. Disable Vignetting correction for starters, as that function literally makes the corners brighter (though, it is not meant to make them so oddly bright that the centre looks dark).
Do any other lenses exhibit similar behaviour on your camera? Can you test this specific lens on another camera?

**Digitalis** · 07-20-2016, 05:19 PM

Originally posted by W.j.christy

You wouldn't happen to have a variable ND filter on the front would you?

...or a polariser.

Fat Albert · 07-20-2016, 05:41 PM

It's a cataract, my friend...all old lenses eventually get them!

aitrus3 · 07-21-2016, 07:15 AM

Haha Fat Albert! Yes, they can!

And thanks gents, I thought about it a lot while working yesterday and when I got home i looked over everything functionally on the lens. After finding nothing wrong, and not seeing the same problem on the back of the camera or with no lens attached, I determined the problem must be in lightroom. I have it set to automatically apply lens correction upon import. It's not applying the 'wrong' profile though, it's the 'correct' one for the lens (as in, it's got the right name), however, it most certainly is different than what it was in Yosemite. I just updated to El Capitain yesterday morning and these are the first images I've imported and edited since. Before El Capitain the lens profile correction was perfect and did not cause this dark band in the centre. I have yet to try it with any of my other lens', but has anyone else experienced this with El Capitain and Lightroom 6 (non CC) with Pentax lens'?

ChatMechant · 07-21-2016, 08:09 AM

Originally posted by Digitalis

...or a polariser.

Yeah, to me it looks like what you get with a uwa + cpl.

aitrus3 · 07-21-2016, 10:34 AM

Originally posted by ChatMechant

Yeah, to me it looks like what you get with a uwa + cpl.

No polarizer used. No filters at all.

emalvick · 07-29-2016, 02:59 PM

You almost need to show us an image... but if it's LR can you just turn off the profile correction to verify this is what's happening. Otherwise, try a different program (Rawtherapee and LightZone are free Raw processors to test with).

Finally, check with other lenses... Make sure you aren't having a camera/sensor problem.

aitrus3 · 07-30-2016, 07:47 AM

Originally posted by emalvick

You almost need to show us an image... but if it's LR can you just turn off the profile correction to verify this is what's happening. Otherwise, try a different program (Rawtherapee and LightZone are free Raw processors to test with).

Finally, check with other lenses... Make sure you aren't having a camera/sensor problem.

Thanks. I've already determined through my own testing that it's the combination of El Capitain and the 14mm profile; Mac and Adobe messed something up. And if you were to follow the link above, the facebook post is public so anyone can see it and the discussion with some of my photo buddies.

emalvick · 08-01-2016, 08:28 AM

Originally posted by aitrus3

Thanks. I've already determined through my own testing that it's the combination of El Capitain and the 14mm profile; Mac and Adobe messed something up. And if you were to follow the link above, the facebook post is public so anyone can see it and the discussion with some of my photo buddies.

Sorry... I don't use Facebook anymore including others posts on it.

Given the discussion in this thread, I didn't think it had been determined thus my reply before.

aitrus3 · 08-02-2016, 07:07 AM

Originally posted by emalvick

Sorry... I don't use Facebook anymore including others posts on it.

Given the discussion in this thread, I didn't think it had been determined thus my reply before.

No prob

I find it hard to post pictures to the forum, especially when pressed for time, so I just did the quickest solution I could find. So annoying El Capitain causes this issue, and no one seems to know why or be offering up a fix. I've heard it happens to some peoples other lens' too, including an 8mm nikon.

07-20-2016, 12:11 PM	#1
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432	Pentax SMC-DA 14mm f/2.8 ED [IF] Is suddenly recording a dark centre in my frames. I hve the Pentax 14mm f2.8 and it is suddenly recording a dark centre in all my frames. Has anyone experienced this? I don't think it's dirty but will do a thorough cleaning tonight. Thanks! go to this link to see the image and a couple others in the thread. https://www.facebook.com/photo.php?fbid=10157133378780655&set=gm.10153731802...type=3&theater

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07-20-2016, 12:26 PM	#2
W.j.christy Site Supporter Join Date: Oct 2015 Location: Texas Photos: Albums Posts: 558	You wouldn't happen to have a variable ND filter on the front would you?

07-20-2016, 02:18 PM	#3
Giklab Veteran Member Join Date: Jan 2012 Location: Slovenia Photos: Gallery Posts: 2,182	Check if something had found its way onto the back of the lens.

07-20-2016, 02:27 PM	#4
Na Horuk Veteran Member Join Date: Feb 2012 Location: Slovenia, probably Photos: Gallery \| Albums Posts: 11,186	Check front and back of lens to make sure they are clean. Especially the back element. Also, look inside of the lens, maybe with a flashlight, to check if there is anything odd inside. Are you shooting raw or jpeg? Lens profiles, either in-camera for jpeg or in raw software, can do all sorts of things. Disable Vignetting correction for starters, as that function literally makes the corners brighter (though, it is not meant to make them so oddly bright that the centre looks dark). Do any other lenses exhibit similar behaviour on your camera? Can you test this specific lens on another camera?

07-20-2016, 05:19 PM	#5
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	Originally posted by W.j.christy You wouldn't happen to have a variable ND filter on the front would you? ...or a polariser.

07-20-2016, 05:41 PM	#6
Fat Albert Veteran Member Join Date: Jul 2013 Posts: 966	It's a cataract, my friend...all old lenses eventually get them!

07-21-2016, 07:15 AM	#7
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	Haha Fat Albert! Yes, they can! And thanks gents, I thought about it a lot while working yesterday and when I got home i looked over everything functionally on the lens. After finding nothing wrong, and not seeing the same problem on the back of the camera or with no lens attached, I determined the problem must be in lightroom. I have it set to automatically apply lens correction upon import. It's not applying the 'wrong' profile though, it's the 'correct' one for the lens (as in, it's got the right name), however, it most certainly is different than what it was in Yosemite. I just updated to El Capitain yesterday morning and these are the first images I've imported and edited since. Before El Capitain the lens profile correction was perfect and did not cause this dark band in the centre. I have yet to try it with any of my other lens', but has anyone else experienced this with El Capitain and Lightroom 6 (non CC) with Pentax lens'?

07-21-2016, 08:09 AM	#8
ChatMechant Pentaxian Join Date: Jun 2010 Location: Matsuyama Photos: Gallery Posts: 1,284	Originally posted by Digitalis ...or a polariser. Yeah, to me it looks like what you get with a uwa + cpl.

07-21-2016, 10:34 AM	#9
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	Originally posted by ChatMechant Yeah, to me it looks like what you get with a uwa + cpl. No polarizer used. No filters at all.

07-29-2016, 02:59 PM	#10
emalvick Veteran Member Join Date: Feb 2008 Location: Davis, CA Photos: Gallery Posts: 1,642	You almost need to show us an image... but if it's LR can you just turn off the profile correction to verify this is what's happening. Otherwise, try a different program (Rawtherapee and LightZone are free Raw processors to test with). Finally, check with other lenses... Make sure you aren't having a camera/sensor problem.

07-30-2016, 07:47 AM	#11
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	Originally posted by emalvick You almost need to show us an image... but if it's LR can you just turn off the profile correction to verify this is what's happening. Otherwise, try a different program (Rawtherapee and LightZone are free Raw processors to test with). Finally, check with other lenses... Make sure you aren't having a camera/sensor problem. Thanks. I've already determined through my own testing that it's the combination of El Capitain and the 14mm profile; Mac and Adobe messed something up. And if you were to follow the link above, the facebook post is public so anyone can see it and the discussion with some of my photo buddies.

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08-01-2016, 08:28 AM	#12
emalvick Veteran Member Join Date: Feb 2008 Location: Davis, CA Photos: Gallery Posts: 1,642	Originally posted by aitrus3 Thanks. I've already determined through my own testing that it's the combination of El Capitain and the 14mm profile; Mac and Adobe messed something up. And if you were to follow the link above, the facebook post is public so anyone can see it and the discussion with some of my photo buddies. Sorry... I don't use Facebook anymore including others posts on it. Given the discussion in this thread, I didn't think it had been determined thus my reply before.

08-02-2016, 07:07 AM	#13
aitrus3 Pentaxian Join Date: Mar 2010 Location: Kamloops B.C. Photos: Gallery \| Albums Posts: 1,432 Original Poster	Originally posted by emalvick Sorry... I don't use Facebook anymore including others posts on it. Given the discussion in this thread, I didn't think it had been determined thus my reply before. No prob I find it hard to post pictures to the forum, especially when pressed for time, so I just did the quickest solution I could find. So annoying El Capitain causes this issue, and no one seems to know why or be offering up a fix. I've heard it happens to some peoples other lens' too, including an 8mm nikon.