Weird night behavior of pentax-a 50/1.7?

malenisjaj · 03-12-2014, 02:21 PM

Hi,

I noticed some strange irregularities in pictures which were taken with pentax-a 50/1.7. I was thinking maybe this is something that goes with this vintage lens.
Is this normal and what's the proper name for this issue (flares?)?

Thank you!

Attached Images

aurele · 03-12-2014, 02:25 PM

It's some internal reflection. Nothing to worry about.

fgaudet · 03-12-2014, 02:26 PM

If you're talking about the greenish thingy in the sky, to me it looks like plain old lens flare

malenisjaj · 03-12-2014, 02:29 PM

Wow, really fast answers!

Yup, I'm talking about that greenish thingy in the sky. So, there's no way to avoid this kind of flare with vintage lenses like this one?

fgaudet · 03-12-2014, 02:36 PM

Even with a modern lens you'll get some flare, maybe only to a lesser extent. It probably comes from the street lights. The only real way to avoid it is to recompose your shot trying to keep direct light away from shining on your lens

---------- Post added 03-12-14 at 17:37 ----------

Or try to put a simple lens hood, it might get rid of some.

Adam · 03-12-2014, 02:55 PM

Modern coatings are much better than older ones, so you'll see more ghosts and flare when using older lenses. Your best defense is a lens hood and adjusting the angle of the shot.

**crewl1** · 03-12-2014, 02:56 PM - **1 Like**

I'm going with UFOs

demp10 · 03-12-2014, 02:58 PM

Are you by any chance using a protective filter like UV? If you are, try it without, it may be the reflections from the filter.

malenisjaj · 03-12-2014, 03:03 PM

Originally posted by demp10

Are you by any chance using a protective filter like UV? If you are, try it without, it may be the reflections from the filter.

No I'm not. I did try with it but then there were to many of flares.

nightfly · 03-12-2014, 04:23 PM

My 50/1.7 does the same thing. Try bright stars, or better yet, the Moon to reveal further flare. Bothersome to be sure.

03-12-2014, 02:21 PM	#1
malenisjaj Senior Member Join Date: Dec 2013 Posts: 166	Weird night behavior of pentax-a 50/1.7? Hi, I noticed some strange irregularities in pictures which were taken with pentax-a 50/1.7. I was thinking maybe this is something that goes with this vintage lens. Is this normal and what's the proper name for this issue (flares?)? Thank you! Attached Images

03-12-2014, 02:55 PM	#6
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Modern coatings are much better than older ones, so you'll see more ghosts and flare when using older lenses. Your best defense is a lens hood and adjusting the angle of the shot. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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03-12-2014, 02:25 PM	#2
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	It's some internal reflection. Nothing to worry about.

03-12-2014, 02:26 PM	#3
fgaudet Veteran Member Join Date: Oct 2013 Location: Ontario Posts: 726	If you're talking about the greenish thingy in the sky, to me it looks like plain old lens flare

03-12-2014, 02:29 PM	#4
malenisjaj Senior Member Join Date: Dec 2013 Posts: 166 Original Poster	Wow, really fast answers! Yup, I'm talking about that greenish thingy in the sky. So, there's no way to avoid this kind of flare with vintage lenses like this one?

03-12-2014, 02:36 PM	#5
fgaudet Veteran Member Join Date: Oct 2013 Location: Ontario Posts: 726	Even with a modern lens you'll get some flare, maybe only to a lesser extent. It probably comes from the street lights. The only real way to avoid it is to recompose your shot trying to keep direct light away from shining on your lens ---------- Post added 03-12-14 at 17:37 ---------- Or try to put a simple lens hood, it might get rid of some.

03-12-2014, 02:56 PM - 1 Like	#7
crewl1 Site Supporter Join Date: Jul 2010 Location: Los Angeles, CA Photos: Gallery \| Albums Posts: 9,807	I'm going with UFOs

03-12-2014, 02:58 PM	#8
demp10 Veteran Member Join Date: Jun 2011 Location: Atlanta Photos: Albums Posts: 602	Are you by any chance using a protective filter like UV? If you are, try it without, it may be the reflections from the filter.

03-12-2014, 03:03 PM	#9
malenisjaj Senior Member Join Date: Dec 2013 Posts: 166 Original Poster	Originally posted by demp10 Are you by any chance using a protective filter like UV? If you are, try it without, it may be the reflections from the filter. No I'm not. I did try with it but then there were to many of flares.

03-12-2014, 04:23 PM	#10
nightfly Senior Member Join Date: Nov 2008 Location: Maine, USA Photos: Gallery Posts: 251	My 50/1.7 does the same thing. Try bright stars, or better yet, the Moon to reveal further flare. Bothersome to be sure.