Overexposure with fast lenses

Clavius · 06-21-2011, 06:43 AM

Here's another newbie question for you guys!

I've noticed that my K5 works very well together with my slower DA lenses. My kitlens, my DA 16-45, DA 10-17 and the DA 55-300.

Strange thing is, with my faster lenses, the FA 50 f1.4 and the DA 35 f2.8 ltd, it suddenly overexposes.

I've been correcting his issue by adjusting the EV compensation to underexpose -1 and even -2. Only then correctly exposed pictures appear. This solution feels a lot like chimping. Which it is, I have to take a picture first, see what it looks like, and then adjust the EV compensation and take a corrected pic.

Please tell me what I'm doing wrong here.

yusuf · 06-21-2011, 06:52 AM

Does it happens at all the apertures or only at faster aperture? Have you fixed your ISO at higher value? It's possible that light is strong enough and shutter speed is not able to match it.

Clavius · 06-21-2011, 07:04 AM

Originally posted by yusuf

Does it happens at all the apertures or only at faster aperture? Have you fixed your ISO at higher value? It's possible that light is strong enough and shutter speed is not able to match it.

Thanks for you quick reply.

Yes, it happens at all apertures. Also with pictures where the shutter speed is easily able to match. Like 5.6 / 300sec / iso 200.

What do you mean with fix the iso at higher value? I did activate the iso noise reduction in the higher iso's yes.

JeffJS · 06-21-2011, 07:32 AM

He means, are you taking photos at an ISO that is higher than needed? A few more details and even photos (with EXIF in tact) would probably help. Such as, what mode are you using?

yusuf · 06-21-2011, 08:05 AM

Originally posted by Clavius

Thanks for you quick reply.

Yes, it happens at all apertures. Also with pictures where the shutter speed is easily able to match. Like 5.6 / 300sec / iso 200.

What do you mean with fix the iso at higher value? I did activate the iso noise reduction in the higher iso's yes.

Nevermind, I was just wondering if ISO is too high that causing even highest shutter speed to be insufficient (often happens with me when I forget to reset ISO after night shooting).

Since this is not the case with you, you might want to share a few more details like mode, sample pictures.

RonHendriks1966 · 06-21-2011, 08:34 AM

Well some lenses just need a little adjusment and some don't. Part of learning equipement.

MaK5 · 06-21-2011, 09:39 AM

I've never tired FA50 1.4 myself, but my FA31 overexposes about 1.5EV. Other fast lenses I've tried (FA43, FA77, DA*55) seem just fine. I've tried 3 different FA31s, and they all overexpose the same amount. I guess it's lens and body combination issue. It's easy to adjust, so no big deal.

Clavius · 06-21-2011, 09:49 AM

Originally posted by MaK5

I've never tired FA50 1.4 myself, but my FA31 overexposes about 1.5EV. Other fast lenses I've tried (FA43, FA77, DA*55) seem just fine. I've tried 3 different FA31s, and they all overexpose the same amount. I guess it's lens and body combination issue. It's easy to adjust, so no big deal.

Ok, just wanted to make sure it wasn't incorrect settings or something.

Thanks everybody!!

Smeggypants · 06-21-2011, 07:44 PM

I have a FA50/1.4. It doesn't overexpose on my K-5s

pbizarro · 06-22-2011, 01:30 AM

My K5 also overexposes with my 31 Limited. At first I was a bit surprised, but then it is easy enough to adjust.

asp1880 · 06-22-2011, 01:31 AM

Sticky aperture? Try at wide open, f1.4. If it exposes correctly wide open, it might be a sticky aperture. Maybe the K-5 wants to actuate the aperture faster than its predecessors (speculation).

Sincerely,
--Anders.

06-21-2011, 06:43 AM	#1
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,150	Overexposure with fast lenses Here's another newbie question for you guys! I've noticed that my K5 works very well together with my slower DA lenses. My kitlens, my DA 16-45, DA 10-17 and the DA 55-300. Strange thing is, with my faster lenses, the FA 50 f1.4 and the DA 35 f2.8 ltd, it suddenly overexposes. I've been correcting his issue by adjusting the EV compensation to underexpose -1 and even -2. Only then correctly exposed pictures appear. This solution feels a lot like chimping. Which it is, I have to take a picture first, see what it looks like, and then adjust the EV compensation and take a corrected pic. Please tell me what I'm doing wrong here.

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06-21-2011, 06:52 AM	#2
yusuf Pentaxian Join Date: Nov 2008 Location: Palo Alto, CA Photos: Gallery Posts: 2,497	Does it happens at all the apertures or only at faster aperture? Have you fixed your ISO at higher value? It's possible that light is strong enough and shutter speed is not able to match it.

06-21-2011, 07:04 AM	#3
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,150 Original Poster	Originally posted by yusuf Does it happens at all the apertures or only at faster aperture? Have you fixed your ISO at higher value? It's possible that light is strong enough and shutter speed is not able to match it. Thanks for you quick reply. Yes, it happens at all apertures. Also with pictures where the shutter speed is easily able to match. Like 5.6 / 300sec / iso 200. What do you mean with fix the iso at higher value? I did activate the iso noise reduction in the higher iso's yes.

06-21-2011, 07:32 AM	#4
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	He means, are you taking photos at an ISO that is higher than needed? A few more details and even photos (with EXIF in tact) would probably help. Such as, what mode are you using?

06-21-2011, 08:05 AM	#5
yusuf Pentaxian Join Date: Nov 2008 Location: Palo Alto, CA Photos: Gallery Posts: 2,497	Originally posted by Clavius Thanks for you quick reply. Yes, it happens at all apertures. Also with pictures where the shutter speed is easily able to match. Like 5.6 / 300sec / iso 200. What do you mean with fix the iso at higher value? I did activate the iso noise reduction in the higher iso's yes. Nevermind, I was just wondering if ISO is too high that causing even highest shutter speed to be insufficient (often happens with me when I forget to reset ISO after night shooting). Since this is not the case with you, you might want to share a few more details like mode, sample pictures.

06-21-2011, 08:34 AM	#6
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Well some lenses just need a little adjusment and some don't. Part of learning equipement.

06-21-2011, 09:39 AM	#7
MaK5 Forum Member Join Date: Mar 2011 Location: Maryland Photos: Gallery Posts: 81	I've never tired FA50 1.4 myself, but my FA31 overexposes about 1.5EV. Other fast lenses I've tried (FA43, FA77, DA*55) seem just fine. I've tried 3 different FA31s, and they all overexpose the same amount. I guess it's lens and body combination issue. It's easy to adjust, so no big deal.

06-21-2011, 09:49 AM	#8
Clavius Veteran Member Join Date: Feb 2011 Location: De Klundert Photos: Gallery Posts: 4,150 Original Poster	Originally posted by MaK5 I've never tired FA50 1.4 myself, but my FA31 overexposes about 1.5EV. Other fast lenses I've tried (FA43, FA77, DA*55) seem just fine. I've tried 3 different FA31s, and they all overexpose the same amount. I guess it's lens and body combination issue. It's easy to adjust, so no big deal. Ok, just wanted to make sure it wasn't incorrect settings or something. Thanks everybody!!

06-21-2011, 07:44 PM	#9
Smeggypants Veteran Member Join Date: Sep 2010 Posts: 1,536	I have a FA50/1.4. It doesn't overexpose on my K-5s

06-22-2011, 01:30 AM	#10
pbizarro New Member Join Date: Jun 2011 Location: Lisbon Photos: Albums Posts: 10	My K5 also overexposes with my 31 Limited. At first I was a bit surprised, but then it is easy enough to adjust.

06-22-2011, 01:31 AM	#11
asp1880 Veteran Member Join Date: Jul 2010 Location: Lyngby, Copenhagen Photos: Albums Posts: 742	Sticky aperture? Try at wide open, f1.4. If it exposes correctly wide open, it might be a sticky aperture. Maybe the K-5 wants to actuate the aperture faster than its predecessors (speculation). Sincerely, --Anders.