Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-01-2010, 05:49 PM   #1
Senior Member

Join Date: Apr 2010
Posts: 288
Not sure what I lose with the K Mount

I was looking at variou lens on ebay and found on Pentax K mount. I looked in the manual for the k-x and found:

It has in the far right column "MP" and then "K" and then under the programs:
Av(AperturePriority)AutomaticExposure with the aperture open.(Adjusting the aperture ring has no effect on the actual aperture value.)

Does that mean it will control the aperture or that I have to? Also, does that K mean K-mount while the others are Ka-Mount, Kaf-Mount, etc.? I know it won't be autofocus but would have liked aperture to be controlled.

edit: i found the answer. I tried to delete this but there is no delete. sorry.

05-01-2010, 07:46 PM   #2
Veteran Member

Join Date: Mar 2010
Location: NewYork
Posts: 899
I'm still trying to learn the various mounts myself. Since no one has responded yet though, perhaps some of these links will help.

Pentax K mount - Wikipedia, the free encyclopedia

Pentax Lens/Camera Compatibility - Mark Roberts Photography

There is a really good link that shows pics of each mount and explains them but I cannot find it now (I think I have it somewhere in my mess of hundreds of book marks). If I find it I'll post it if I can unless someone beats me to it.

I'm a noob but hopefully that will help a little.
05-01-2010, 07:52 PM   #3
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
Glad you found the answer, but since this a common point of confusion:

First, *all* lenses that you will be using a K mount. That's the generic terms for every lens intended to mount to your camera. So just because a lens says K-mount, that doens't mean there is anything at all you "lose".

But it is true that technically speaking, there are different "flavors" of K-mount: the original K, KA, KAF, KAF2, etc. See Welcome to Bojidar Dimitrov's Pentax K-Mount Page for tons more info. Also see the sticky thread at the top of the beginner's forum on how to use manual lenses - this is specific there to show you how to use the original K mount lenses (no "A" or "F").

  • 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!
aperture, k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
LR2 and a re-install...what will I lose Ben Hunt Digital Processing, Software, and Printing 2 04-20-2009 06:56 AM
Using it, so I don't lose it surfcr8zy Welcomes and Introductions 2 01-25-2009 04:01 PM
Not for those who want to lose weight creampuff Post Your Photos! 10 10-22-2008 06:50 AM
what do I lose by going with the 200D gcap74 Pentax DSLR Discussion 23 04-01-2008 09:17 AM
Will I lose your respect.... Eaglerapids Pentax SLR Lens Discussion 13 03-10-2008 02:18 PM

All times are GMT -7. The time now is 12:24 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]