A sluggish aperture would probably cause over exposure, as the lens
wouldn't be fully closed down when the shutter opened.
I have noticed that the K-5II, (and all earlier models of Pentax DSLR
I've owned), grossly underexposed when using the green button on pre A
lenses in dim light. Long lenses also tend to underexpose, just a
little, but the files in that case are still easily usable.
On 7/22/2016 1:54 PM, Bipin Gupta wrote:
For Dave Re: 55-300 & the lenses that are under exposing on the K-5.
I am using the 55-300 WR lens on a K-5 IIs and find it pretty sharp at
the 300mm end. Yep, the problem is the huge length of the Lens barrel
at 300mm. Sure enough the overhang contributes to unsteadiness and
shake.
Even on a tripod you need to use it with Mirror Up, as it does not
have a Tripod Collar.
Just wondering if there is a DIY for fitting a Tripod Collar from Evil Bay??
As for the Lenses Under Exposing, check if you have Spot Metering turned on??
Could be also that these lenses have a sluggish Aperture. Hope you
have checked with some other Lens?
I will be in Thornhill, Ontario visiting my son and you are welcome to
join me for a shooting tryout - with lenses of course.
Thornhill has plenty of Photogenic places, including my son's big
black dog Shadow who will obediently pose for us.
Regards.
Bipin.
camp: San Mateo, California
Photography is a constantly evolving art form. Only Fools think they
have mastered it completely.
--
I don't want to achieve immortality through my work; I want to achieve
immortality through not dying.
-- Woody Allen
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