Comments made by johnriley - Page 605

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No problem at all, just select an aperture on the lens in the usual way.

Comment by johnriley posted on Pentax-A lens on an ME Super at 12/08/2013 - 19:48

Most mechanical devices like being in use so I expect SDM lenses are no exception. With an in body motor that's getting used all the time, so little to worry about there. But a lens that's only used every few months might just get lazy and need a push to get it going again?

I'm only guessing, but it seems reasonable. Our 18-135mm lenses haven't been a problem, but they get used all the time.

Comment by johnriley posted on DA* motor failure rate at 12/08/2013 - 17:00

I'd appreciate you posting a picture.

Comment by johnriley posted on Pentax Aluminium Case at 12/08/2013 - 16:54

What is the interior like?

Comment by johnriley posted on Pentax Aluminium Case at 12/08/2013 - 15:20

The A setting enables proper communication between lens and camera. You control the aperture from the camera, there's no loss of control. You can then use Av, Tv or whatever else you want without resorting to stop down metering.

It's far quicker , far easier and also the metering will be more reliable.

Comment by johnriley posted on M42: Am I missing something? at 12/08/2013 - 09:01

If you set them both to 10MP you might as well use the K10D if you're happier with it. Maybe even keep a look out for another?

Comment by johnriley posted on K5 soft focus, poor colour contrast and detail at 12/08/2013 - 08:03

Bear in mind that much of the current camera design stems from the era of film and manual focusing. Wider aperture lenses are brighter and therefore easier to focus manually.

Most wide aperture lenses were probably often used around f/8 like every other lens....

Comment by johnriley posted on I think Pentax lost a bet... at 11/08/2013 - 23:26

Indeed, the problem is judging any difference on a tiny focusing screen. I've always found DOF preview to be totally useless on 35mm cameras, so it won't be any better on APS-C.

Comment by johnriley posted on I think Pentax lost a bet... at 11/08/2013 - 23:01

Some early A series lenses were prone to failure of the aperture ring, but it isn't a general problem. I have only ever had one that failed and it was a very early SMC Pentax-A 50mm f/1.7 - the aperture mechanism fell apart.

Unfortunately I tried to fix it and was rewarded by a spray of springs and ball bearings that would not go back together again....we live and learn!

Comment by johnriley posted on Pricing on the DA 50mm f1.8 prime? at 11/08/2013 - 21:38

It's ultrasonic, so you won't hear anything.

Comment by johnriley posted on K-5 dust removal at 11/08/2013 - 21:35

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johnriley

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