Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-15-2007, 07:37 AM   #1
New Member




Join Date: Dec 2006
Posts: 14
Need help with a 28 2.8 M

I picked up an ME Super with 50 2.0M, 28 2.8M and a 135 2.8M with a pentax flash for $35.00 from a neighbor. The 28 and 135 are Image brand? Never heard of it but the 135 works and is very sharp. The issue is the 28. I give me the same photo no matter what f stop I set. I have enabled the allow aperture ring function on my K10D but it still doesn't seem to work. It works fine on the 135. By the way the pentax flash doesn't work, too bad it was a nice small one. Any advice?

03-15-2007, 08:06 AM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,677
Check the diaphragm lever on the 28mm-it might be stuck or broken.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

03-15-2007, 08:12 AM   #3
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,495
Is the aperture closing when you use the DoF preview (ON/OFF button to the right)?
03-15-2007, 08:55 AM   #4
Veteran Member
borno's Avatar

Join Date: Nov 2006
Location: md-usa
Photos: Gallery | Albums
Posts: 2,580
Like mo said the lever in the back should open the iris easily from the minimum f22 or whatever and when released it should snap closed to where the ring is set. If it doesn't look for oil on the iris,the grease used to lubricate the focus can migrate into the lens from being in a hot place. They can be cleaned but it's a delicate operation.hope this helps.
tom

03-15-2007, 09:05 AM   #5
New Member




Join Date: Dec 2006
Posts: 14
Original Poster
QuoteOriginally posted by blende8 Quote
Is the aperture closing when you use the DoF preview (ON/OFF button to the right)?
I'm using that button for digital preview.

Check the diaphragm lever on the 28mm-it might be stuck or broken.

It does move but the iris doesn't seem to do anything.

I'll keep trying.
03-15-2007, 09:07 AM   #6
roy
Inactive Account
roy's Avatar

Join Date: Sep 2006
Location: D/FW area, Tx.
Photos: Gallery
Posts: 1,712
as stated, ck it off camera and see what it does.
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!
flash, k-mount, pentax, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -7. The time now is 05:19 PM. | 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