Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-28-2011, 03:59 PM   #46
Veteran Member
glasbak's Avatar

Join Date: Apr 2009
Location: Netherlands
Posts: 344
Beyond telecentric

Did forget how I did this, but an easy way to get something telecentric, is reversing a 50/1.7 before a short tele (90..135mm) lens.

05-29-2011, 12:28 AM   #47
Junior Member
waxsage's Avatar

Join Date: Dec 2010
Location: near Shefield
Photos: Gallery
Posts: 25

This is a link that shows the theory for a telecentric lens on both image and object side.

You really need that stop in between the front and back lens and it has to be the right size and the right distance between the two lenses to make the lens truly telecentric.

At that point you would have a chance of capturing a sharp focus stack all the way through an object of 2 - 3 centimetres.

Last edited by waxsage; 05-29-2011 at 12:30 AM. Reason: misread last post!
05-29-2011, 12:01 PM   #48
New Member

Join Date: Sep 2008
Location: Hamburg, Germany
Posts: 11
Original Poster
Luckily, for people like myself that are not currently up to building a telecentric lens system, photoshop takes care of the distortions in layer stack. So not all is lost... This is a result with 6 layers, once more with the reversed 80mm Rodenstock enlarger lens at f/5.6...


  • 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!
extension, k-mount, lens, macro, magnification, pentax lens, slr lens, tubes
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax primes (F50/1.7, F50/2.8 macro, F100/2.8 macro, FA100/2.8 macro) dgaies Sold Items 5 11-02-2010 11:51 AM
For Sale - Sold: PENTAX-D FA 50mm F2.8 Macro and Sigma 180mm F/3.5 EX DG IF APO Macro Lens LenWick Sold Items 9 06-16-2010 11:09 AM
Wanted - Acquired: Wanted SMC Pentax F 35-70mm Macro / F 35-105mm Macro Pentax Bob Sold Items 6 04-19-2010 06:56 AM
For Sale - Sold: Vivitar S1 105mm f2.5 1:1 Macro; Tamron SP 90mm f2.8 1:1 Macro; Pentax-F 1.7X thomasxie Sold Items 4 02-02-2010 05:40 AM
For Sale - Sold: Sigma DL Macro Super 70-300mm f/4-5.6 1:2 Macro Lens, Worldwide Ship! wallyb Sold Items 10 12-16-2009 10:36 PM

All times are GMT -7. The time now is 04:45 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]