Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-17-2010, 12:02 PM   #1
New Member

Join Date: May 2010
Posts: 2
[langtitle=da]Forskel p Pentax A og M Obektiv?[/langtitle]


Jeg har et Pentax K10D og overvejer at købe et brugt analogt 50 mm. objektiv.

Jeg har set på et Pentax - M 1:1.7 50mm og et Pentax - A 1:1.7 50mm.

Er der nogen som kan forklare hvad forskellen på A og M er?

05-17-2010, 12:10 PM   #2
Junior Member
captainslack's Avatar

Join Date: Oct 2009
Location: NC
Posts: 40
I would suggest getting the A lens. The optics are probably the same on both, but the difference is in that cameras control of the aperature setting. With the A lens, your K10D will recognize the aperature & adjust metering accordingly. It won't recognized the change in aperature with the M lens.
05-17-2010, 12:20 PM   #3
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,680
See here: Pentax K-Mount Lenses Explained

The essential difference is that the A version allows for auto aperture control wile the M doesn't; both lenses are manual focus.

Adam Webmaster (Site Usage Guide | Site Help | My Photography)'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:

05-17-2010, 12:33 PM   #4
Pablom's Avatar

Join Date: Feb 2010
Location: Jerusalem
Posts: 1,940
effectively with the A lens you can do everything the same as any modern lens except for no AF.
With the M lens it's a little more complicated than that and I'll leave the explanations for someone else for I suspect I will confuse you

05-17-2010, 12:42 PM   #5
New Member

Join Date: May 2010
Posts: 2
Original Poster
Tak for svarene :-) Jeg vil g efter en A-er
05-18-2010, 11:44 AM   #6
Senior Member

Join Date: Oct 2009
Location: amsterdam
Posts: 130
I have both.
Big difference: multi-pattern-metering versus centre-weigth.
Small difference: better coating; tiny bit sharper.
Both little nice lenses, mechanical and optical.
Since I don't like to change body-adjustments all the time I use the m50 in combination
with other m and K lenses when time is not an issue and the A in combination with the
other AE lenses.

  • 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!
50mm, har, jeg, k-mount, og, pentax, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Acquisto pentax negli Stati Uniti e garanzia Internazionale Mitch Photographic Technique 3 12-07-2010 03:16 AM
Would my Chinon lenses fit to a Pentax dSLR? Sarajevo Pentax SLR Lens Discussion 13 10-01-2010 01:12 AM
Accurate dimensions of Pentax K-7 - Light-Path karmazyn Pentax DSLR Discussion 0 02-28-2010 02:20 PM
Pentax K110D shutter release button fault? bogner Pentax DSLR Discussion 0 12-23-2009 09:09 AM

All times are GMT -7. The time now is 09:20 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]