Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-28-2010, 06:01 PM   #1
New Member

Join Date: Apr 2010
Location: Bellingham WA
Posts: 7
Fantasy lens: 200-400mm compact F8 apo WR for high ISO future cameras

As ISO creeps up we could have great mini "long" lenses--- e.g. if the K7 "super" gets us up to ISO 25K or higher this kind of lens would be a shoe-in. -Sure, Bokeh is cool, but a 1970's 50mm F1.x will always provide Bokeh. Anybody else want compact and long?

05-28-2010, 11:59 PM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,032
I have a feeling that AF and metering would be quite unreliable with such a lens- whether it be F8 or F5.6-8. Can't defeat the laws of optics by increasing sensitivity! Then again, if Pentax can come up with a better AF sensor and winder metering range while they were at it, then we might be in business

Adam Webmaster (Site Usage Guide | Site Help | My Photography)'s high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-29-2010, 12:06 AM   #3
Veteran Member

Join Date: Aug 2009
Location: New England
Photos: Albums
Posts: 689
This makes me wonder... How did Minolta manage to make an AF 500mm f/8 mirror lens?

  • 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!
bokeh, iso, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Compact cameras? PHOTOCOP Pentax Compact Cameras 21 05-29-2010 09:28 PM
Sigma APO 400mm f5.6 Telephoto Lens that is foggy jack56 Pentax SLR Lens Discussion 6 07-30-2009 11:16 AM
k20d High ISO test shots 200-6400 PentaxPoke Pentax DSLR Discussion 44 04-27-2009 08:02 PM
Info on 400mm Sigma APO telephoto lens SOldBear Pentax SLR Lens Discussion 7 04-06-2009 09:56 PM
Does K20 (high ISO)+ F4 lens = no need for 2.8 vievetrick Pentax SLR Lens Discussion 16 04-10-2008 02:35 AM

All times are GMT -7. The time now is 07:00 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]