Search results for 'uv filter' - page 299
Circular Polarising Filter help.
Ray, I wouldn't buy those to be honest. The lens you will put it on cost a lot so it's worth to put a high quality filter on it or else you will most like degrade the quality of your photos, even those high grades do that. Get B+W or Hoya, they are the best and worth the money. I like B+W since...
Posted by Anvh on 01/05/2009 - 19:03
Circular Polarising Filter help.
Agreed, B+W are superb filters.
Posted by johnriley on 01/05/2009 - 19:09
Circular Polarising Filter help.
Yes you can turn them, i believe all do to be honest. It's worth to get the coated ones. i've a b+w pol mrc for my macro and it's on it 24/7 so the bit more protection and repelend against dirt and moist is welcome.
Posted by Anvh on 03/05/2009 - 19:47
Circular Polarising Filter help.
I vote for Hoya Pro1D, just ordered one (costs 38 Euro). Laszlo
Posted by Me on 03/05/2009 - 21:42
Circular Polarising Filter help.
I vote for Hoya Pro1D, just ordered one (costs 38 Euro). Laszlo Do you have a link for this please. Thanks for all your help and advice.much appreciated.:)
Posted by Rae000 on 04/05/2009 - 07:10
Circular Polarising Filter help.
I vote for Hoya Pro1D, just ordered one (costs 38 Euro). Laszlo Do you have a link for this please. Thanks for all your help and advice.much appreciated.:) It seems they have only 52 and 58 mm at the moment :cry:
Posted by Me on 05/05/2009 - 16:32
Circular Polarising Filter help.
"Agreed, B+W are superb filters" Agreed. However, everyone forgets (or does not know) that HELIOPAN are just as good. Same Schott (Zeiss) glass, same brass mouns, same superb construction and materials and also German made.
Posted by bretbysteve on 05/05/2009 - 18:07
Circular Polarising Filter help.
Yes, Heliopan as well, although we don't often see them around.
Posted by johnriley on 05/05/2009 - 18:29
Noise Removal Software
I find Helicon Filter http://www.heliconsoft.com/heliconfilter.html pretty good, I've had it years since Beta and it has developed into quite a capable package.
Posted by Greytop on 06/05/2009 - 22:08
Mono conversion questions
Simply black & white filter layer in photoshop, sorry that it ain't anything special :? :)
Posted by Anvh on 09/05/2009 - 19:49
Filters & Sigma 10-20
I have purchased a used Sigma 10-20, which came with a UV and CPL. I have used a circular grad filter on my Tamron 18-250, but from what I have read the Cokin system is superior to the circular ones. So my question is do the Cokin system work with the Sigma (using a wide-angle holdall), and with...
Posted by bychan on 17/05/2009 - 20:26
Filters & Sigma 10-20
CPL's can be used with the 10-20. They may be an uneven effect from polarisation due to the vast angle of the lens. There may be some vignetting from a thick filter. The Hoya Pro ones are thin. Cokin P and similar systems can also be used with this lens, though with vignetting at the wide end, un...
Posted by iceblinker on 17/05/2009 - 20:55
Filters & Sigma 10-20
Ther is also a Z-pro serie from cokin, you can reverse mount the filter holder so that you get a slim filter. The filters are also 100mm wide so filters from other systems also fit in it. Z-pro is more expensive though but the filters are higher qualty then the P ones also.
Posted by Anvh on 18/05/2009 - 01:03
Sensor cleaning
I doubt one of those things is powerful enough without touching the nozzle against the sensor*, which is something you would want to aovoid. * or putting it so close that there would be a risk of accidental contact. The nozzle could mark the sensor filter even if made of soft material. The slight...
Posted by iceblinker on 27/05/2009 - 13:20
Black and White Filters - Digital and Physical
What techniques do people use for recreating the look of black and white filters? There are a lot of techniques and plug-ins, and in-camera options, but I always struggled with noise in my black and white shots, esp the skies. I wondered whether restricting the actual light going to the sensor...
Posted by Pentaxophile on 05/06/2009 - 21:27
Black and White Filters - Digital and Physical
... to be honest I can't follow your reasoning. Those are both taken with digital right? digital sensor capture only! red green and blue light. This a good example how an sensor sees the world. So if you're using a colour filter infront of the lens, you will reduce the effectiveness ...
Posted by Anvh on 05/06/2009 - 22:26
Black and White Filters - Digital and Physical
I use Channel Mixer in Photoshop when I want black and white filter effects.
Posted by johnriley on 05/06/2009 - 22:27
Black and White Filters - Digital and Physical
...So if you're using a colour filter infront of the lens, you will reduce the effectiveness of the pixel. Orange light is mostly red and a bit of green so no blue. so your resolution drops with 1/4th because you can't use the blue pixel and probable also that amount with green, you're basicly worki...
Posted by Pentaxophile on 05/06/2009 - 23:14
Black and White Filters - Digital and Physical
I know that most of the noise is made by the blue pixels so if you can filter those out that might save quite a lot in the noise. you can only select the blue layer in photoshop and blur it a lot or remove it... don't know what effect it would have on the photo.
Posted by Anvh on 05/06/2009 - 23:38
Black and White Filters - Digital and Physical
There are many more filters than red, orange, yellow or green, but they are the most common ones. Current BW films are certainly panchromatic, but the problem is that their sensitivity is not the same as the human eye. We use filters to correct the reproduction of different colours so that we eit...
Posted by johnriley on 06/06/2009 - 09:12
