Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-01-2018, 07:58 PM   #31
Veteran Member
Mark Ransom's Avatar

Join Date: Jul 2015
Location: Minneapolis, MN, USA
Photos: Albums
Posts: 496
QuoteOriginally posted by Rondec Quote
The Pentax 24-70 f2.8 uses 82mm filters (they aren't cheap) and the DA *16-50 takes 77mm filters. Not sure how this would be so much smaller. I don't think your math quite works. (The DA 15 f4 is 49mm filter).
The formula I used is the minimum for the outer element size. Obviously there are other factors that go into it. It's far too simplistic to account for zooms or wide-angle primes, but it works well for telephoto primes.

The point was that 200mm was an incredible estimate that had no basis in reality.

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!
body, canon, canon ff milc, milc, milc 28-70 f2.0, rumors
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
a Full-Frame System MILC to boost Pentax market share... geo444 Pentax Full Frame 85 05-23-2018 04:56 PM
rumored Pentax mirrorless camera - something between K1000 and K-01 grahame Pentax News and Rumors 480 01-26-2017 09:36 AM
Canon 5DmkIV @ $3,799 - rumored - early 2015 interested_observer Non-Pentax Cameras: Canon, Nikon, etc. 33 01-10-2015 02:07 PM
Canon as the last MILC player? farhagh Photographic Industry and Professionals 2 05-08-2012 03:56 PM
Canon's Evil Specs are rumored Samsungian Non-Pentax Cameras: Canon, Nikon, etc. 2 01-28-2010 06:37 AM



All times are GMT -7. The time now is 01:23 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