Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-16-2014, 02:15 AM   #1
Veteran Member
PiDicus Rex's Avatar

Join Date: May 2013
Location: Melbourne, Australia
Posts: 1,380
Pentax Glass, BMD Pocket Cam, and a Fotga Adaptor,....

So, from the thread title, you may guess what I've been practicing on, before loaning one for a short film shoot.

But this post isn't (yet) about the limitations of the Pocket Camera.
It's about the Fotga adaptor for K-mount lenses to M4/3rds cameras.

While shooting some behind the scenes stuff, I noticed that the focus marks on my lenses barrels didn't match up with the estimates of subject distance for what was being filmed.
And all my Zooms suddenly acted Vari-Focal instead of the Parfocal behaviour I've noted on my K-01.
Checking the barrel marks against a tape measure using my K-01, I've confirmed all my K and KA lenses are surprisingly accurately marked - accurate to the point where from f4 to f22 I will have absolute faith in the markings from now on.
At least on the K-01.

The FFD of the K-mount is 45.5mm. M4/3rds has an FFD of 19.2mm.
( Lens mounts - Camera-wiki.org - The free camera encyclopedia )
So an adapter for K to M4/3 must be 26.3mm between lens and body flanges.

The Fotga branded adapters are 25.32mm according to my set of calipers.

So, for anyone else using one, you may need to measure the flange to flange distance, and do what I'm doing, make a shim to fit under the K-mount end to set the correct FFD for the K-mount lenses on the BMD Camera, or GH-4 if you're using one.


Last edited by PiDicus Rex; 09-16-2014 at 02:23 AM.
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!
camera, flange, hdslr, k-01, k-mount, lens, lenses, measure, video
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Pentax Q Body - Black and Auto 110 glass and adapter kenafein Sold Items 10 08-13-2013 06:39 PM
Pocket Wizzards and Pentax Deiberson Flashes, Lighting, and Studio 2 05-04-2011 11:23 AM
Pocket Size Portable + Linux + Carl Zeiss glass = Nokia N900 rm2 General Talk 8 10-12-2009 12:09 PM
Adaptor for OM glass to Pentax body tarponn22 Pentax SLR Lens Discussion 3 01-28-2009 08:46 AM
Just got pocket wizards and have a question on K10D sharpshoota Pentax DSLR Discussion 6 04-11-2007 05:59 PM



All times are GMT -7. The time now is 06:49 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