Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-24-2013, 01:40 PM   #1
Inactive Account

Join Date: Jun 2008
Location: St. Louis, MO
Photos: Albums
Posts: 2
D FA Macro 100mm F2.8 lens

I have a D FA Macro 100mm F2.8 lens. It is not a WA. I would like to learn how to use this lens but can not find anything that could help me. Do you know where I can go to get information on what all the numbers mean and I how can best utilize this lens.

04-24-2013, 01:49 PM   #2
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,156
The numbers on the distance scale represent the magnification ratio. At 1:1, the size of the object in real life matches the size of the image projection on your sensor. At 1:2, the image is half the size of the real thing, and so on.

The best way to familiarize yourself with the lens is to cut loose and shoot things very close to it

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:


  • 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!
100mm, f2.8, fa, fa macro 100mm, k-mount, lens, macro, macro 100mm f2.8, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax D-FA 100mm f2.8 Macro WR & DA* 200mm F2.8 ED [IF] SDM jurysi Sold Items 11 09-17-2012 05:27 PM
For Sale - Sold: FA 50mm f1.4 / D FA 100mm f2.8 Macro / FA 77mm 1.8 Ltd / TAMRON 28-75mm f2.8 trustkor Sold Items 7 07-13-2012 10:43 PM
For Sale - Sold: Pentax D/FA 100mm f2.8 Macro lens GaryH Sold Items 5 04-28-2012 07:30 PM
Pentax-D FA 100mm F2.8 Macro WR or Pentax-FA 100mm F2.8 Macro jkobleur Pentax SLR Lens Discussion 3 09-05-2011 06:47 PM
For Sale - Sold: SMC Pentax-D FA 100mm F2.8 Macro Lens (Worldwide) dgaies Sold Items 2 06-07-2011 03:07 AM

All times are GMT -7. The time now is 11:15 PM. | 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]