Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-13-2009, 08:03 AM   #1
Inactive Account




Join Date: Oct 2009
Photos: Albums
Posts: 79
K-x: ghosting in image

Hi,

I noticed last night that if I take a picture with my K-x where bottom half of the pic is the TV (on), then I could see some part of what is on the TV on the upper half. The ghosting on the upper half seems to be upside-down reverse of what's on the TV. The shutter speed was 1/20 or so. This does not happen when taking normal picture. Has anyone experienced this? I assume that it's normal but it's quite weird.

12-13-2009, 08:15 AM   #2
Veteran Member




Join Date: Jan 2008
Location: Ste-Anne des Plaines, Qc., Canada
Posts: 2,014
You are likely getting a reflection from somewhere in the lens.
12-13-2009, 08:19 AM   #3
Inactive Account




Join Date: Oct 2009
Photos: Albums
Posts: 79
Original Poster
So you think it's a lens issue, as in everyone has that problem or something wrong with my lens? I can try with my other lens to see. Btw, the lens I used has an old UV filter on it. I'm not sure if that could be the issue too either.

Should I be worry or it's fine?
12-13-2009, 08:25 AM   #4
New Member




Join Date: Dec 2009
Location: Canada
Posts: 19
I saw a similar issue in one of my pictures shot the day I bought my K-x. It was a night shot of the outside of a restaurant where a bright sign at the top of the image was reflected upside down on the bottom of the image. This was with the kit zoom and a B&W UV filter. I wonder at the cause as well.

12-13-2009, 09:09 AM   #5
Dom
Guest




Your filter is causing your ghosting and double images.
12-13-2009, 09:32 AM   #6
Veteran Member




Join Date: May 2009
Location: Twin Cities, MN
Posts: 2,869
yep, old UV filter, plus high contrast areas (the TV) equals ghosting 100% of the time.

edit: ANY filter will give this effect - reason I stopped using them. If you have a high contrast scene the filter will reflect light between itself and the lens, causing a reverse or double reflection in the image.
12-13-2009, 09:35 AM   #7
Inactive Account




Join Date: Oct 2009
Photos: Albums
Posts: 79
Original Poster
Thanks guys! Filter will go off in such situations.
12-13-2009, 10:29 AM   #8
Junior Member




Join Date: Jul 2009
Location: London
Photos: Gallery
Posts: 42
I had the same thing with my new Sigma 30 f1.4... Thought I was doing the right thing putting a UV filter to protect it, but I was getting this ghosting with almost any light source even candles. Filter is off now and keeping my drink from staining the coffee table.

However a really nice Hoya Pro HD fitler on my 12-24 with no ill effects so far so I think I'll just leave it.

12-13-2009, 04:32 PM   #9
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,660
Ugh. I have also had bad experiences with filters causing ghosting and flare. Eg the Tiffen UV filter that came as a freebie with my FA 50 1.4 was a ghosting monster. The lens was literally unusable in low light because of it. If you have to use filters, choose them with care.

I recommend this technical review of UV filters for good advice on which to get:
UV filters test - Introduction - Lenstip.com

Summary page:
UV filters test - Description of the results and summary - Lenstip.com

Also useful to note: price does not equal quality when it comes to filters. One of the cheapest filters (the Hoya HMC UV-0) also rates the best.
12-13-2009, 11:03 PM   #10
Veteran Member




Join Date: May 2009
Location: Twin Cities, MN
Posts: 2,869
Rawr, that is a nice site with a good summary of your best bets for filters. I personally dont find a need for them, but it is good to have a resource for finding the best value! In the case of that tiffen filter, you might as well be taping a pane of glass in front of the lens as it seems to be rated as such!
12-14-2009, 05:26 AM   #11
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,660
Yeah, I like that site and that series of tests. The Hitachi U-2900 series spectrophotometer doesn't lie!
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, half, k-x, photography, picture, tv
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax K7 LCD Screen flickers and ghosting redeleon Pentax DSLR Discussion 9 06-23-2012 04:17 PM
Ghosting - Due to UV? ManhattanProject Pentax SLR Lens Discussion 5 08-11-2010 03:00 PM
SMC A 35 - 105mm 3.5 and ghosting on digital c a sugg Pentax SLR Lens Discussion 11 04-15-2010 12:05 AM
weird ghosting and very bright poppinfizz Troubleshooting and Beginner Help 18 07-09-2009 05:05 AM
Filter ghosting? I GOT PROOF! rburgoss Photographic Technique 31 06-23-2008 02:02 PM



All times are GMT -7. The time now is 10:52 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top