Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-15-2010, 06:15 AM   #1
Inactive Account




Join Date: Dec 2010
Location: Western Australia
Posts: 2
Pentax KX plus lens question

Dear Readers,
This is my first post as a proud owner of a new Pentax KX camera. I have used as ME Super for many years but have now graduated to the KX.

My main question is this. I have attached an old lens to my new camera and it does not seem to want to work. The lens is an AUTO-PROMURA CP Hi-Lux MC 1:4:5 f=80-200mm lens.

When I look through the viewfinder I am faced with a blackout. nb. the lens cap is not on!

Is there something obvious I am not doing which is stopping me using this lens?

Best Regards,

philrob
Western Australia

12-15-2010, 10:26 AM   #2
Veteran Member
sterretje's Avatar

Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,534
I don't know the lens but it sounds like the aperture is closed.
12-15-2010, 10:29 AM   #3
Veteran Member
jolepp's Avatar

Join Date: Oct 2010
Location: Finland
Photos: Albums
Posts: 3,196
Is this a k-mount lens (or an M42 with an adapter) ?
12-15-2010, 10:34 AM   #4
Veteran Member
Nesster's Avatar

Join Date: Oct 2006
Location: NJ USA
Photos: Gallery
Posts: 13,047
Congratulations on the KX - I assume this is the film KX and not the digital K-X?

Check the following:
1) the mirror in the camera is down - if this is the film KX the foam bumper may be old and sticky; in the short run shaking the camera usually lets the mirror drop, the proper solution is to replace light seals and foam
2) with the lens off the camera, test the aperture, it should work in the same manner as your good lens, with the same lever in the same location.
3) Just making sure - you can see through the view finder with no lens and with a known good lens?

12-15-2010, 10:44 AM   #5
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,841
The K-mount system is designed so that the lens aperture is fully opened when the lens is properly mounted. That should apply to any lens with a K-mount. So the first question is, does your lens mount look like the first one pictured in this article?

https://www.pentaxforums.com/forums/pentax-lens-articles/87589-photos-k-m42-m...-k-mounts.html

If it does, you should look through the lens off the camera. The aperture blades should fully open in two ways. With the aperture ring set to f4.5, they'll always be open. They should close a little with each step on the aperture ring and be fully closed at f22 or whatever the highest number is. Then you should be able to move the aperture lever (tab sticking out of the mount) and the blades should open. The lever is spring-loaded and should have little resistance to movement. You should be able to flick it and have the blades snap open and closed, somewhat like a shutter.

When the lens is mounted on the camera, the camera has its own lever that holds the lever on the lens fully open. If that doesn't happen, the lens aperture stays closed and the viewfinder gets pretty dark. You can normally see something, it's just grainy and dark.

Does the lens work at all on the ME Super?
12-18-2010, 04:55 AM   #6
Inactive Account




Join Date: Dec 2010
Location: Western Australia
Posts: 2
Original Poster
Pentax KX - lens problem

First thing is to say thank you for the replies from all parties.

I have discovered what the problem is - the lens used is an old one which does not have automatic focus.

I have bought an appropriate lens for my camera now and it works like a dream!

Merry Christmas to all!

Phil
Western Australia
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, kx, lens, pentax, pentax help, pentax kx, photography, question
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
pentax DA lens question trev99 Pentax SLR Lens Discussion 5 11-17-2010 08:50 PM
Pentax and Lens question isusdfr Troubleshooting and Beginner Help 15 09-09-2010 01:21 AM
Pentax lens question maryo Pentax SLR Lens Discussion 3 10-12-2008 02:36 AM
Pentax Lens series question DigiNoob Pentax SLR Lens Discussion 7 02-10-2008 10:33 PM
Pentax-A 1:1.7 lens question ckbboy Pentax SLR Lens Discussion 5 01-21-2008 06:48 PM



All times are GMT -7. The time now is 06:11 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