Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Pentax / Samsung dSLR, K Mount Mirrorless

Reply
 
Thread Tools Search this Thread
Old Dec 24, 2007, 11:05 AM   #21
Senior Member
 
Robert Barnett's Avatar
 
Join Date: Mar 2007
Posts: 323
Default

Thanks for the info on the filters. Very useful stuff.

Robert
Robert Barnett is offline   Reply With Quote
Old Dec 24, 2007, 12:22 PM   #22
Senior Member
 
bigdawg's Avatar
 
Join Date: Feb 2005
Location: Thach Alabama
Posts: 14,981
Default

Robert Barnett wrote:
Quote:
Thanks for the info on the filters. Very useful stuff.

Robert
You are most welcome. Just remember..All things being optimum...You will get sharper photos without a filter between the sensor and the subject....They are just a useful tool, nothing more or less!

Dawg
bigdawg is offline   Reply With Quote
Old Dec 26, 2007, 8:06 PM   #23
Senior Member
 
Monza76's Avatar
 
Join Date: Jul 2004
Posts: 4,095
Default

Here is an example of ghosting caused by a Tiffen UV filter attached to a kit lens.



Notice the "green ghost" of the reading light "projected on the sheets. The same shot without the filter had no trace of this ghost and was of generally better contrast. (sorry, I deleted the "clean" shot without thinking, but if you are curious enough it is easy to duplicate).

Ira
Monza76 is offline   Reply With Quote
Old Dec 26, 2007, 8:19 PM   #24
Senior Member
 
Robert Barnett's Avatar
 
Join Date: Mar 2007
Posts: 323
Default

Thanks for the demo.

Robert
Robert Barnett is offline   Reply With Quote
Old Dec 26, 2007, 8:53 PM   #25
Senior Member
 
bigdawg's Avatar
 
Join Date: Feb 2005
Location: Thach Alabama
Posts: 14,981
Default

Usually will happen when you shoot a very bright light or reflection...I get those at night with a kit lens and no filter on it! It's not just a filter then that will do it...Here is one with a Pentax 50mm 1:1.7 kit lens and it has no filter in front of it..

Here is one with sunlight!



Moonlight.


And moonlight again.


Ghosting is caused by the bright light hitting the lens at an angle thus the lens works like a prism causing the varicolored "ghost". The filters are not the cause but an uncoated filter will make it happen more frequently and worse than an uncovered lens but it isn't the cause of the ghosting. When I have a filter on and I get ghosting I remove the filter then see if the ghosting goes away...If not I put the filter on and move to a different angle to the light source! Coated lenses will help the ghosting be less frequent and allow a sharper angle to a bright light but they won't totally eliminate it. Just cause less of it and at sharper angles to a bright light source! My Two Cents!!

Dawg


bigdawg is offline   Reply With Quote
Old Dec 26, 2007, 11:33 PM   #26
Senior Member
 
Robert Barnett's Avatar
 
Join Date: Mar 2007
Posts: 323
Default

Well whatever their source they are ugly.

Robert
Robert Barnett is offline   Reply With Quote
Old Dec 27, 2007, 12:05 AM   #27
Senior Member
 
bigdawg's Avatar
 
Join Date: Feb 2005
Location: Thach Alabama
Posts: 14,981
Default

But the small ones are easily Cloned out in Photoshop!

Dawg
bigdawg is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 7:44 PM.