The Last Post.

Tried my other AF lenses.

Same improvement!

It's like I have a whole new kit!

To tell you how bad this backward focusing problem was - from day one, I couldn't get my zoom lenses to autofocus on infinity when set to wide angle (the green pentagram indicator would just flash, and I'd have to go to manual focus to force the shutter to fire).

No longer!

I'm delighted!

Thanks!!!

OH MY!!!!!!!!

What a difference!

I've maxed the forward focus and it appears to be dead center now with my 31mm Ltd set at f1.8.

I'll put my other AF lenses on later to see if this correction is consistant across the board, but the 31mm is the best lens I own and I one I really care about the most. I used to leave the Av at f8, now I'm gonna run around at f1.8, and really use this lens properly.

Thanks for the tip, Pete.

Reminder to everyone - "at your own risk".

Update.

I haven't had time to actually change any values yet, but the directions in your post work with a K110D, Pete!

(And I actually managed to get out without anything blowing up!)

When I get some time I'll go back in and run some tests.

Thanks,

Ohhh Pete!

You know I'm just crazy enough to try this!

Did you read the last post in that thread about what Pentax said?

All who enter here - at your own risk!

(follow me)

I'll let you know. This is either going to work or I'm looking for a K20.

Pete,

Thanks for clearing that up!

Hey Don,

Pete says I can run around blind with no screen and the camera on AF - that way all my shots will be surprises (and probably better than what I'm getting when I actually try!)
I'll save that for when you come down. You like stuff like that. Otherwise, I was planning to use YOUR gear!

Pete, the shim is already there in the factory install - not supplied by Katz-eye. Looks like all K110D's must have one as it shows in the Katz-eye installation manual for K110D, K100D and K200 models.

Now to screw up the courage to actually install it.

Oh, and the photos bear out what I see in the viewfinder - AF backfocused, manual dead-on. There is quite a change when I switch from AF to Man and back. Very audible and visible.

Meanwhile - good ol' f8 will have to get me by until I find that "secret" setting which probably only exists for K10's and K20's.

Thanks again!

John,

Does the camera just do this automatically, or is it a process we have to initiate? If so, how do we start? Would my humble K110D be able (never mind that, would the humble K110D owner be able?)

Hi Team!

I used both the Nikon (booooo) and Pentax (yea!) focusing charts to check out the Auto Focus on my K110D. Used a whole whack of AF lenses, including my 31mm Ltd.

The tests were shot initially wide open (Max aperture) on each lens.

All results had major back focusing issues which only began to somewhat resolve at f8 or smaller apertures. At least the center line was in focus. Oh, yeah - it's bad!

As this problem is constant no matter which lens I use, may I conclude that the camera body internals are off?

Now, I'm just about to install a Katz-eye split image focusing screen, when I get the courage, and as I look through the very detailed instructions I see a shim which is located between the prism housing and the screen - all held in place by a hinged clip.

Is it possible that this shim is the incorrect thickness? I'd like to think that, but when I manually focus - everything is sharp as a tack, making me believe that the focusing screen's position HAS to be 100%.

Now my poor head hurts......

Would love any ideas!

Cheers and have a great day!

Hi Jeff,

WELCOME!

I don't know this particular lens, but I'm only able to use the older M lenses which have a Man / Auto switch. Once set to Man (Manual), I'm able to set an f stop on the lens, and set the camera to AV mode. The camera will then will select the appropriate shutter speed and ISO.

With M lenses without the switch, I too have to shoot wide open.

This also applies to all my screw mount lenses which I use with an adapter on DSLR - must have the switch set to Manual.

I hope this makes sense, and good luck.

Hi Joe,

I'm afraid you've just described world history.

By the way your English is fine!

Cheers,

You said it, Darkmunk.

CUTE!

The little guy has great attitude!