Digital BW, The Print

Richard,

I used a Heliopan KR15 plus polarizer on a number of shots this last week.
In the few comparisons I've looked at the highlights and shadows were
slightly improved.  Of course, the effective speed also dropped -- almost 2
stops for the amber KR15 (Wratten 85b) and another 1 2/3 for the polarizer
(B+W circular).  (These German & Kodak Wratten [gel] filters are the only
ones I trust to be stacked without any significant image quality problems.)


This combination was also used where I needed slower speeds for water
motion.  So, I didn't need my ND filter at all.

The camera's meter adjusted appropriately to the filtration.  (I used a
Pentax spot meter also to learn what the camera's meter can and cannot do
well.)

I had previously used a yellow + magenta to get a more substantial dynamic
range increase.  However, I have not had time to do more with this.

Paul
www.PaulRoark.com 


> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Richard
> Smallfield
> Sent: Monday, July 18, 2005 5:02 PM
> To: Digital BW Print
> Subject: [Digital BW] Digital contrast filtration
> 
> Hello,
> I followed a thread on putting filters on your DSLR, but somehow lost the
> emails.
> 
> I have thought of putting orange or red filters on my D70 because
> selecting the red channel adds a huge amount of
> noise.
> 
> I have used a polarising filter to good effect, however.
> 
> Any thoughts on what approach works best on a DSLR would be appreciated.
> 
> thanks,
> Richard
> --
> Portraiture and Location Photography
> http://smallfield.vze.com
> http://photos.smallfield.vze.com
> 
> 
> 
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