Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-01-2014, 06:20 PM   #1
Site Supporter
Site Supporter

Join Date: May 2009
Location: Sacramento
Photos: Albums
Posts: 131
? Re Metz 58-AF2 not registering lenses ...

I'm using a new to me Metz 58 AF2 on my k20d and had a quick question. When I attach my 50 mm FA 1.4 it shows up as an A70mm when using Pttl. I can change it to M50mm on the flash but should that be necessary?

FYI my 40mm shows up as a 50mm
My 70mm shows up as an 85mm

07-02-2014, 05:16 AM   #2
Veteran Member
kkoether's Avatar

Join Date: Jul 2008
Location: Huber Heights, OH, USA
Photos: Gallery | Albums
Posts: 578
Try toggling Zoom Size on your flash.

Hope that helps.
07-02-2014, 08:32 AM   #3
Veteran Member
FrankC's Avatar

Join Date: Dec 2011
Photos: Gallery
Posts: 318
You're not taking into account the crop factor of your lens. The lens barrel may be at the 50mm position, but the focal length is equivalent to an 80mm on a 35mm or full-frame camera, which would make the flash's decision to be set at 70mm correct.
07-02-2014, 11:24 PM   #4
Site Supporter
Site Supporter

Join Date: Oct 2010
Location: Melbourne
Photos: Gallery
Posts: 2,932
QuoteOriginally posted by FrankC Quote
which would make the flash's decision to be set at 70mm correct
But the distance from camera to object does not change with the crop factor.

07-03-2014, 08:57 AM   #5
Site Supporter
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,698
QuoteOriginally posted by Schraubstock Quote
But the distance from camera to object does not change with the crop factor.
This is true, but the flash has an internal zoom feature that varies the illuminated area according to lens FOV. That feature is normalized to the 35mm equivalent.


  • 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!
metz, metz 58 af-2, pentax help, re metz 58-af2
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Metz 58 AF2 meetering off on Pentax K5 urssu Flashes, Lighting, and Studio 7 05-01-2014 11:26 AM
Metz Mecablitz 58-af2 - Works With K-30? ahw Pentax Camera and Field Accessories 13 10-08-2012 06:09 AM
Wireless Servo Mode on Metz 58-AF2 teljalis Flashes, Lighting, and Studio 4 09-25-2011 10:35 PM
Metz 58-AF2 krebsy75 Ask B&H Photo! 2 06-28-2011 08:45 AM

All times are GMT -7. The time now is 01:51 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]