BUTTERWORTH NOTCH FILTER - NOTCH FILTER


Butterworth notch filter - Poly filter media



Butterworth Notch Filter





butterworth notch filter






    notch filter
  • A circuit that takes a small "slice" out of the bandpass tuned by a receiver; this is useful for reducing interference from narrow bandwidth signals.

  • A specialized kind of equalizer that can be tuned to "notch out" problem frequencies without affecting neighboring frequency bands. Usually used to kill feedback frequencies. Equinox features two switchable notch filters.

  • A filter that attenuates signals within a very narrow band of frequencies

  • In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of a band-pass filter.





    butterworth
  • Best in-band amplitude flatness, lower stopband attenuation than Chebyshev, better than Chebyshev for group delay flatness and overshoot (usually used as a compromise). All of the above are realizable in parallel-coupled, direct-coupled, and interdigital filter topologies.

  • a washing process used to gas free or clean a cargo tank, employing hot water or chemicals, sprayed through a patented rotating nozzle. ¬†back

  • Butterworth was a township occupying the southeastern part of the parish of Rochdale, in the hundred of Salford, Lancashire, England. The centre of Butterworth was east of the market town of Rochdale











Erie Pennsylvania Dramatic Marina




Erie Pennsylvania Dramatic Marina





Erie Pennsylvania Marina located on the bayfront.

This is ( SOOC ) straight out of the camera with no processing done at all. I have captured this during one of the really cool moments over the bay with just using my Grad ND filter. I could never capture anything nice crisp and sharp like this before with any filters... but I learned a trick that you need to have top notch filter and lens to start with. I am pretty happy with Nikkor 18-55mm VR lens' performance. :-)

I kept this all original since it already looked like a post card and I wanted it to serve more like an editorial shot for local interests as well.

~Have a wonderful weekend everyone!~

© 2008 Igor Borisenko Photography. All Rights Reserved.











Moon (HDR filter) Pentax K-M, smc PENTAX-FA 80-320mm F4.5-5.6 14-05-11 IMGP8077




Moon (HDR filter) Pentax K-M, smc PENTAX-FA 80-320mm F4.5-5.6 14-05-11 IMGP8077





This was to try the in-camera HDR filter (one notch) to improve the dynamic range across the grey areas.

Date
Taken on May 14, 2011 at 12.29am BST (edit)

Exif data
Camera Pentax K-m
Exposure 0.008 sec (1/125)
Aperture f/9.0
Focal Length 320 mm
ISO Speed 100
Exposure Bias 0 EV
Picture Mode Manual; 1/3 EV steps
Drive Mode Continuous (Hi); No Timer; Shutter Button; Single Exposure
Lens Type smc PENTAX-FA 80-320mm F4.5-5.6










butterworth notch filter







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