Free Shipping on ALL Products
camera reviewsbest cameraslens reviewsphotography tipscamera forumvideo toursphotography bookssupport me
It is currently Sat Apr 19, 2014 8:53 pm

All times are UTC




Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Mon May 19, 2008 9:17 pm 
Offline
User avatar

Joined: Tue Jan 15, 2008 11:27 pm
Posts: 351
Here's the link:

http://www.amazon.com/HOYA-72mm-Circula ... 310&sr=1-2


What do you guys think of just a basic filter from a decent Brand name like Hoya. I know its not Multi-coated but prices just fly off the the deep end quick. I was trying to stay away from really generic brands, and sunpack at least.

Well do you think this will do OK. I'm thinking of this on my 28-135mm and a step-up ring for my nifty-fifty.

Any closer competitors let me know.

Thanks

_________________
Canon 40D kit Lens 28-135mm IS, Canon 50mm F/1.8, 10-22mm, 100 2.8 macro, 580 Ex.


Top
 Profile  
 
 Post subject:
PostPosted: Wed May 21, 2008 9:58 pm 
Offline

Joined: Sun May 11, 2008 6:18 pm
Posts: 10
Location: Athens, Greece
I have a question.

What does a photographer need a polarizing filter while using image post processing can fix everything? Especially if you shoot in RAW...

_________________
Canon EOS 450D Rebel XSi ... Canon EF-S 17-85mm f/4-5.6 IS USM


Top
 Profile  
 
 Post subject:
PostPosted: Wed May 21, 2008 10:17 pm 
Offline
Moderator
User avatar

Joined: Sat Sep 30, 2006 4:30 pm
Posts: 9784
Location: UK
Nightwolf wrote:
I have a question.

What does a photographer need a polarizing filter while using image post processing can fix everything? Especially if you shoot in RAW...

I think that the effect of a polarising filter is the one effect it is very difficult to replicate in post-processing. See the sky in my post here as an example.

Bob.

_________________
OM-D E-M1 + ED 12-40mm f/2.8, H-F007014E, M.ZUIKO DIGITAL 45mm 1:1.8, M.ZUIKO DIGITAL ED 75mm 1:1.8, L-RS014150E.
OM-D E-M5, H-PS14042E, Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.


Top
 Profile  
 
 Post subject:
PostPosted: Wed May 21, 2008 10:35 pm 
Offline

Joined: Mon Feb 18, 2008 1:05 am
Posts: 421
Location: Turkey
Nightwolf wrote:
I have a question.

What does a photographer need a polarizing filter while using image post processing can fix everything? Especially if you shoot in RAW...


Megahertz and nanoseconds aside, a polarizer basically does the following:

1. Darkens your exposure by about 2/3 stops (depends on the brand and the type/amount of coating, though) to prevent blown-out highlights. An ND-grad is apparently better suited for this, however. This effect can be simulated in post-processing to a certain extent, using curves and highlight recovery, though the result may be too dull for comfort.

2. By definition, a 'polarizer' has the ability to shift the polarization of the light reflected from your subject (and anything nearby, at that) so much that it can rid the subject (or the surroundings) of any reflections whatsoever. For instance, it can completely eliminate reflections from the surface of a lake, allowing you to see (and shoot) something down below in absolute clarity. However, this really works if you have the light coming from your side, and on non-metallic surfaces only. This effect, AFAIK, can not be simulated in post-processing.

_________________
"Shoot RAW, ask questions later"
My Flickr Photostream. C&C Welcome!
Nikon D80 | AF-S Nikkor DX 18-135 mm f/3.5-5.6G ED | AF Nikkor 50 mm f/1.8D | AF Nikkor 70-210 mm f/4


Top
 Profile  
 
 Post subject:
PostPosted: Wed May 21, 2008 11:11 pm 
Offline
User avatar

Joined: Tue Jan 15, 2008 11:27 pm
Posts: 351
thanks for the reply's. The descriptions help to support my reason to buy one. I am traveling to Rivera Maya, Mexico in 3 weeks and am wanting a polarizer for all the water, sky, and possibly help with washing out pictures.


But, for my kit lens, do you think a basic Hoya like mentioned above will do the job? trying to stay away from some low budget filters, but can't really swing the big $$$ for some of these other ones.

thanks

_________________
Canon 40D kit Lens 28-135mm IS, Canon 50mm F/1.8, 10-22mm, 100 2.8 macro, 580 Ex.


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 22, 2008 9:22 am 
Offline

Joined: Tue Mar 11, 2008 7:09 pm
Posts: 96
I'm buying this one ND: LINK

and this CP: LINK

would like to know what's the difference between them because they say they both remove reflections and increase contrast...


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 22, 2008 11:21 am 
Offline

Joined: Tue Jul 31, 2007 11:45 pm
Posts: 73
Location: Belgium
Hailstorm wrote:


1. Darkens your exposure by about 2/3 stops (depends on the brand and the type/amount of coating, though) to prevent blown-out highlights. An ND-grad is apparently better suited for this, however. This effect can be simulated in post-processing to a certain extent, using curves and highlight recovery, though the result may be too dull for comfort.




By my knowledge most polarizers hold back 1.5 - 2 stops of light. Polarizers do not prevent blown out highlights. Your camera will just slow down in shutterspeed to about 1.5 or 2 stops (the same amount that the polafilter holds back)....so the exposure of the whole scene stays exactly the same because the camera compensates the loss of light. Unless you lower the exposure compensation manually...your highlights will be equal to a photo taken without the polarizer. A polarizer does lower reflection on non metallic surfaces and this adds to the overall more saturated look that you get using a polarizer. Leafs look greener because they do not reflect , skies look more blue ....watersurfaces become transparent( if the water is clean that is :) ). You can enhance saturation in parts of a photo with photoshop.....but, you can not filter reflections out of the photo with photoshop.


Top
 Profile  
 
 Post subject:
PostPosted: Thu May 22, 2008 11:38 am 
Offline

Joined: Tue Jul 31, 2007 11:45 pm
Posts: 73
Location: Belgium
kno3 wrote:
I'm buying this one ND: LINK

and this CP: LINK

would like to know what's the difference between them because they say they both remove reflections and increase contrast...


A polarizer will remove most of the reflections in a scene. The effect depends on the angle that its used to the sun. If you use a polarizer on an angle thats about 90° to the sun the effect will be most visible.(if you keep the sun to your right or left side) If you photograph in the direction of the sun or if you stand with your back to the sun the effect is almost non existing.

An nd filter will not remove reflection or enhance contrast......nd -filters are used to slow down the exposure time by the filter-factor.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  

All words, images, videos and layout, copyright 2005-2012 Gordon Laing. May not be used without permission.
/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs

Webdesign by Alphabase IT
Powered by phpBB® Forum Software © phpBB Group