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K70 Aperture Block Failure ?

PostPosted: Mon Jun 17, 2019 1:04 pm
by Slix
Hi Guys, I am considering purchasing a K70 as my old K5ii s is showing signs of ageing. Among the reviews I have read some have mentioned a problem with Aperture Block Failure. Can anyone tell me what this is and is it a common fault with Pentax as mentioned in the reviews.
Thanks for any info you may be able to provide.
Also any other help and advice regards the K70 generally would be appreciated
Slix

K70 Aperture Block Failure ?

PostPosted: Mon Jun 17, 2019 9:28 pm
by richandfleur
The issue mainly occurred on the K-30 and K-50 models. I've heard less reports around the K-70 line.

K70 Aperture Block Failure ?

PostPosted: Mon Jun 17, 2019 11:28 pm
by MrB
As you know, when composing through the viewfinder, the lens aperture is wide open. When the shutter is actuated, the so-called 'aperture block' is the electro-mechanical device in the camera body, which closes down the aperture (if necessary) to the selected value. If it fails, the aperture snaps down to its smallest value, so the resulting image is likely to be under-exposed, possibly even black.

The K-70 was introduced 3 years ago in July 2016, so there must be many thousands now in use, but there have been very few reports of this 'dark image' problem with this camera. It would seem that this part is probably no more prone to failure than any other unit within any digital camera.

The K-70 is a great DSLR and great value for money but it might be worth bearing in mind that it is pitched at a lower user level than your K-5IIs. So perhaps consider whether there are some features of your K-5IIs which you wouldn't want to lose by moving to the K-70. They should be clear in many reviews and comparison sites. Other options to consider might be the K-3, K-3II and KP

Philip

K70 Aperture Block Failure ?

PostPosted: Wed Jun 19, 2019 1:17 pm
by Slix
Thanks for these replies and as suggested by Philip I will be researching the K3, K3ii and the KP.
Cheers
David

K70 Aperture Block Failure ?

PostPosted: Tue Jun 25, 2019 9:38 am
by ronniemac
Shout out for the K-70! Mine has never missed a beat!

Best value Pentax ever released.