Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
06-11-2008, 06:02 PM   #1
Veteran Member

Join Date: May 2008
Location: Virginia
Posts: 376
Question About Auto/Manual Switch on Vivitar M42 Lens

I have a Vivitar 28/2.8 Auto lens, and am not familiar with the auto/manual switch it has. It is not the slide type of a/m switch. It has a ring with an "m" with an arrow pointing at it. How do I switch back and forth on this lens? I have fiddled with it a bit, but I do not want to force any of the controls.


06-11-2008, 06:31 PM   #2
Site Supporter
maxwell1295's Avatar

Join Date: Jan 2008
Location: Long Island, New York
Photos: Gallery
Posts: 2,704
You should be able to slide it back and forth (it may have to be mounted on the camera first). To use it, you should set it to M and use the aperture ring to for aperture adjustments. No need to stop down with these lenses.....just shoot in Av mode and all you have to do is focus and shoot. That's worked for me with every M42 lens I've used. They're actually easier to use than M lenses. You will probably need to up your EV comp to +2 since these lenses seem to consistently underexpose.
06-11-2008, 06:49 PM   #3
Veteran Member

Join Date: May 2008
Location: Virginia
Posts: 376
Original Poster
The problem is that I do not see a slide switch (as I have on my other M42 lenses). I see some type of nub on the ring. The nub has a small metal (chrome) lever that can be pushed in. There is also a grooved lever that looks like a wheel--that is, the top portion of the wheel comes through the barrel of the lens. This wheel-type thing is next to the arrow and "M," and is behind the ring.


  • 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!
auto/manual, k-mount, lens, pentax lens, slr lens, switch, vivitar
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
What "AUTO" on a manual focus Vivitar lens? emr Pentax SLR Lens Discussion 5 08-06-2010 09:56 AM
SMC Takumar 85mm 1.8 Auto/Manual Switch Jammed Irishwiseguy Pentax SLR Lens Discussion 12 06-29-2010 11:36 AM
How to fix a auto-only M42 lens so it becomes a manual one sterretje Pentax SLR Lens Discussion 5 05-16-2010 10:12 PM
auto/man switch question BernardMarx Pentax Film SLR Discussion 15 06-15-2009 12:11 PM
Vivitar 28/2.8 Auto (M42) zx-m Pentax SLR Lens Discussion 0 06-06-2008 11:21 AM

All times are GMT -7. The time now is 01:02 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]