A problem that wasn't

davidwozhere
Posted 29/10/2026 - 23:24 Link
Just in case anyone else comes upon my recent problem ....

I changed the lens on my K1 and, as I often do, had a quick look through the viewfinder. It was out of focus so I half pressed to engage the AF. It was still out of focus. Oh Sh**! I checked everything and tried a different lens. Just the same problem. I released the shutter and got a perfectly focused and exposed image! Oh No. Is it my eye? After various silly tests it wasn't my eye so what is going on? Is the viewfinder dirty? So I cleaned it and things remained the same. I put an offending lens onto the K3. No problem. So it's the camera.
I went and got a beer - the universal panacea and then I noticed a tiny control wheel just to the right and behind the viewfinder. Turns out that I had inadvertently caught it with a finger and turned the diopter control when I changed the lens!

So check it before panicking if you get a similar 'fault' It will more than likely be your own (fault),
Both the *istDS and the K5 are incurably addicted to old glass

My page on Photocrowd
LennyBloke
Posted 30/10/2026 - 06:41 Link
Clearly the deciding factor in your in depth investigation into the root cause was the Beer - you've changed my life, I will always fall back to your approach for any problems in future
LennyBloke
Lubbyman
Posted 30/10/2026 - 08:11 Link
LennyBloke wrote:
Clearly the deciding factor in your in depth investigation into the root cause was the Beer - you've changed my life, I will always fall back to your approach for any problems in future
+1.

Just remember that the beer goes into the orifice that's usually behind the camera, not into the camera itself.

Steve
Jonathan-Mac
Posted 30/10/2026 - 10:55 Link
Most people will tell you not to touch the wheel after a drink but in this case they're wrong...

I have had this happen to me. The wheel on my S5 is too easly moved so I long ago covered it with some black electrical tape, which is barely noticeable.

I once had a similar problem on one of my Nikon F801Ss but the problem turned out to be that the focusing screen had been knocked out of position and had fallen a bit.

And, Nikon again, I recently bought a used F80 for a very good price and when I got it the viewfinder was very dark and I couldn't get any lens to focus on it. Checked the little wheel, not that, checked the focusing screen, not that. I thought I might as well put some batteries in it to check if the electronics work and when I did that and half-pressed the shutter the VF and focusing problems cleared up. I have absolutely no idea what might have happened that could be caused just by having no batteries.
Pentax hybrid user - Digital K3, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X and Panasonic L digital
Fan of DA limited and old manual lenses
Edited by Jonathan-Mac: 30/10/2026 - 10:56

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