Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-25-2012, 05:59 PM   #1
Site Supporter
shaolen's Avatar

Join Date: May 2012
Location: Phoenix AZ
Posts: 749
Aperture ring and zooming

So I had an FA 28-200 lens which used a manual aperture ring. If i have it on "A" on the ring and then zoom in, my aperture will get smaller as I zoom which is normal, but what happens if you leave it on the largest aperture and then zoom in? I tried it once and the picture was infact brighter but I didn't notice a difference in the bokeh. Is this bad for the lens? And why if you can leave it on the max aperture and then zoom would they make it so if you have it on A, it would get smaller as you zoom?

11-25-2012, 06:17 PM   #2
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,287
The camera cannot read the aperture if the lens is not on the 'A' setting. You can make it work by putting the camera in 'M' mode and metering using the green button.

If you take it off 'A' and set any aperture the lens will stay at that aperture. If you zoom and it is set on the maximum aperture the lens will change to whatever the maximum is for that zoom setting as you zoom out.

It won't hurt the camera or lens but the camera will not be able to meter properly when the lens is not set to 'A'. (Unless you meter manually using the green button)
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!
aperture, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Zooming in and out of an image using the exposure compensation and green buttons bwDraco Pentax K-5 5 05-15-2012 02:05 PM
[SOLD]Pentax K mount, Sigma 70-300 f 4/5.6 macro autofocus with aperture ring and A Markbrumbaugh Sold Items 4 02-28-2012 01:17 PM
DA lenses and what ever happened with the aperture ring? Toro Pentax SLR Lens Discussion 9 04-18-2010 06:49 PM
Use of Aperture-Ring 43mm/1.9 -> no aperture data Deimo Pentax SLR Lens Discussion 7 06-24-2009 03:25 PM
MZ-S and aperture-ring less lenses Gooshin Pentax Film SLR Discussion 10 01-11-2009 12:28 PM



All times are GMT -7. The time now is 09:29 PM. | See also: NikonForums.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