Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-29-2015, 10:09 AM   #1
Loyal Site Supporter
bwDraco's Avatar

Join Date: Jul 2010
Location: New York
Photos: Albums
Posts: 1,015
Let's talk about patents: US5485242 and US5382997 (Hyper-Program)

There are a surprising number of patents covering the devices we use every day—and digital cameras are no exception. This thread is part of a series discussing patents covering various technologies in Pentax and Ricoh cameras. You might be surprised about the technologies covered.

The patent I'll be discussing in this thread covers the Hyper-Program control system introduced in the Pentax Z-1 35mm film SLR. This feature is present in essentially every Pentax SLR camera with two control dials since, and is a cornerstone of the Pentax user experience today.

The relevant patent is US5485242, Exposure control apparatus of camera. Among other things, it covers a light metering system coupled to a means of setting the shutter speed and aperture (including electronic dials), with the exposure mode automatically changing to Tv or Av when the shutter speed or aperture is adjusted, respectively, and a means of returning to program mode, such as by pressing a button (the familiar Green button). It also covers exposure compensation and a means of resetting the exposure compensation to 0 within the Hyper-Program framework (claims 15 to 28) and associated indicators for the current exposure mode (claims 29 to 42). A related, earlier patent also covering Hyper-Program, albeit less comprehensively, is US5382997.

These patents are now expired, but it's interesting to see the patents describing Hyper-Program in the first place.

Questions, thoughts, or comments?

—DragonLord


Last edited by bwDraco; 06-29-2015 at 11:19 AM.
06-29-2015, 11:29 PM   #2
Veteran Member
adwb's Avatar

Join Date: Sep 2009
Location: Bristol UK
Photos: Gallery
Posts: 1,632
One has to wonder why since they have expired that other mfg have not implemented this functionality which is often commented on in camera reviews as being such a great feature ?

For various reasons a bought another brand for a specific job and was surprised how I initially missed that button
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
aperture, camera, compensation, control, dslr, exposure, hyper-program, mode, patent, patents, pentax, photography, shutter
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
SO...Let's Talk About Meters! dubiousone Troubleshooting and Beginner Help 24 04-15-2014 02:21 PM
Let's talk about patents: US8305453 (handheld HDR) bwDraco Pentax DSLR Discussion 5 12-01-2013 10:11 AM
Let's Talk About Teleconverter Bokeh... littledrawe Pentax SLR Lens Discussion 26 10-24-2013 06:24 PM
Let's talk about the Maine GOP's new party platform for a moment... deadwolfbones General Talk 49 05-13-2010 07:17 PM
Poll: Let's talk about bokeh Syb Photographic Technique 21 11-01-2007 12:49 AM



All times are GMT -7. The time now is 08:41 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top