Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-20-2008, 01:05 PM   #1
Veteran Member
awo425's Avatar

Join Date: Jan 2008
Location: NYC, USA
Posts: 481
istD and M42 lenses focusing question.

Question to istD owners.

I have istD and K10D bodies and from time to time I use old M42 Pentax lenses on both with M42 to K mount adapter.

When I am focusing the lens mounted on K10D body I get confirmation beep with red square in viewfinder, but I am not getting this confirmation with the same lens on istD body. Do I need to enable something in istD settings menu?

P.S. I do have this confirmation in istD with FA lenses, both visual and audio

Thanks

11-20-2008, 01:09 PM   #2
Veteran Member
JonPB's Avatar

Join Date: Sep 2008
Location: Portland, OR, USA
Photos: Gallery | Albums
Posts: 430
The red square doesn't provide focus confirmation, but rather indicates where the AF sensor is looking. I'm not sure about the beep; that's been off for me from day one. There's a green hexagon in the middle of the status bar in the viewfinder that provides focus confirmation in the K10. Does the istD have a green hexagon?
11-20-2008, 01:41 PM   #3
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,345
on my *istD, with Beep on, and a K mount lens, the beep works, the focus indicator (red dot) lights up showing which sensor is selected, and green hexagon lights.

with my 35mm F2 TAK, it does not light.

I noticed this too when I started with the M42 lenses
11-20-2008, 02:22 PM   #4
Veteran Member
awo425's Avatar

Join Date: Jan 2008
Location: NYC, USA
Posts: 481
Original Poster
QuoteOriginally posted by JonPB Quote
The red square doesn't provide focus confirmation, but rather indicates where the AF sensor is looking. I'm not sure about the beep; that's been off for me from day one. There's a green hexagon in the middle of the status bar in the viewfinder that provides focus confirmation in the K10. Does the istD have a green hexagon?

Yes istD have this hexagon and it's also working/confirming with DA/FA lenses but not with M42 lenses.

11-20-2008, 04:44 PM   #5
Veteran Member
JonPB's Avatar

Join Date: Sep 2008
Location: Portland, OR, USA
Photos: Gallery | Albums
Posts: 430
The only way I can get rid of the green hexagon (with my GX-10) is to turn off auto-focus with a half-press of the shutter. Perhaps the istD is disabling the auto-focus sensor when using an M42 mount?

Does the focus indicator work with A, M, or K lenses? If Lowell's istD is typical, then here's something else to try.

On my camera, trap-in-focus will not work with M42 lenses unless I bridge the last two data pins (as viewed, clockwise, starting at noon, looking at the front of the camera). Maybe the istD uses these pins for all autofocus functions, not just trap-in-focus?
11-21-2008, 02:58 AM   #6
Veteran Member




Join Date: Jul 2008
Location: Var, South of France
Photos: Albums
Posts: 1,071
Hello!

Well, you have to shorten the data pins to force the body to enable focus assistance, as with film bodies... I can't remember which ones, but anyone should do the trick...

What is strange is that you get this focus confirm with the k10...
11-21-2008, 03:32 AM   #7
Veteran Member
JonPB's Avatar

Join Date: Sep 2008
Location: Portland, OR, USA
Photos: Gallery | Albums
Posts: 430
QuoteOriginally posted by JonPB Quote
On my camera, trap-in-focus will not work with M42 lenses unless I bridge the last two data pins (as viewed, clockwise, starting at noon, looking at the front of the camera). Maybe the istD uses these pins for all autofocus functions, not just trap-in-focus?
I recant. dlacouture is correct. Depressing any of the connections works. I thought I had it figured out and didn't take time to try to disprove the hypothesis...typical.
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!
body, camera, confirmation, dslr, istd, k10d, lens, lenses, m42, m42 lenses, photography, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: KatzEye Split Prism Focusing Screen for *istD/DS/DS2 (US) Julio Marcos Sold Items 3 08-06-2010 10:16 PM
Pentax K20D & M42 Lenses Infinity Focus Question kopimorning Pentax SLR Lens Discussion 4 07-17-2010 05:56 PM
Focusing screen compatibility: K20D - istD/DS Fallingwater Pentax Camera and Field Accessories 16 10-08-2009 04:08 PM
Dumb noobie question on M42 vs. k mount lenses... speedoo Pentax SLR Lens Discussion 13 01-28-2009 04:19 PM



All times are GMT -7. The time now is 11:28 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