Hello team,
I need your collective wisdom on a K-7 problem.
I noticed a spot (dust?) on my pictures at Grandfather Mtn..
I had the camera tech clean the sensor at GFM.
On the way thru the Smokies, I shot some landscapes and IT'S BACK!
(still there?)
I've got a spot just below 1/2 way down and a bi
Is it with just one lens or on several? If just one lens then its obviously
a lens issue.
Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller
- Original Message -
From: "Bob Sullivan"
Subject: Dust spots ;-( Give me some help!
Hello team,
I need your collect
hotogallery.com/kennethwaller
>
> - Original Message - From: "Bob Sullivan"
> Subject: Dust spots ;-( Give me some help!
>
>
>> Hello team,
>> I need your collective wisdom on a K-7 problem.
>> I noticed a spot (dust?) on my pictures at Grandfat
On Jun 10, 2010, at 21:36 , Ken Waller wrote:
Is it with just one lens or on several? If just one lens then its
obviously a lens issue.
Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller
- Original Message - From: "Bob Sullivan" >
Subject: Dust spots ;-(
On 11/06/2010, Bob Sullivan wrote:
> I cannot see anything on the sensor's surface.
> Furthermore, the spot disappears when I open the lens to f2.8 or f4.0.
> Spot happens with multiple lenses at f16 or f22.
> It's a small spot, but I don't understand the mechanics.
> Is my sensor broken?
Hi Bob
It's probably just a dust spot that's clinging to the sensor. It may be almost
too small to see. The Pentax sticky pad thingy can probably remove it. The tech
probably missed it.
Paul
On Jun 11, 2010, at 12:01 AM, Bob Sullivan wrote:
> Hello team,
> I need your collective wisdom on a K-7 problem
Rob,
I've tried the dust detect function and it shows nothing - a white
screen mock-up of the sensor.
I'm afraid of something beneath the filter assembly and the trouble of
replacing the camera.
Thanks for the suggestions as to cause.
Regards, Bob S.
On Fri, Jun 11, 2010 at 12:26 AM, Rob Studder
Subject: Re: Dust spots ;-( Give me some help!
> To: "Pentax-Discuss Mail List"
> Date: Friday, June 11, 2010, 9:23 AM
> Rob,
> I've tried the dust detect function and it shows nothing -
> a white
> screen mock-up of the sensor.
> I'm afraid of someth
It almost certainly isn't under the filter. It's simple dust on you sensor.
Get a Rocket Blower or something similar (DO NOT use canned air) and
blow off the sensor. Do that 2 or 3 times, and if it doesn't go away,
I use a sensor pen. If that doesn't get rid of it, then move to wet
cleaning usi
Hi Bob,
It's almost certainly not beneath the filter - if it's right against
the sensor then changing the aperture doesn't make it disappear (it's
the distance between the dust and sensor and the lower angle of the
light that makes the dust disappear as you open the lens aperture).
Depending on w
To Leon and all who replied,
I've been busy today with sensor cleaning.
I gave the camera's dust removal function many activations.
The most troubling spot remains.
I bought swabs and used 4-5 to clean the sensor.
The most stubborn spot remains, plus I move some other spots around.
Here's a full s
Hi bob,
I'd send it off to Pentax. Include the 2 images you linked to so they
are aware of the problem and exactly what they need to fix.
Has the spot been there since new and you just didn't notice it for a
while due to the images you have been taking? I'd also check your
early images, just to
On 6/13/2010 7:46 AM, Bob Sullivan wrote:
To Leon and all who replied,
I've been busy today with sensor cleaning.
I gave the camera's dust removal function many activations.
The most troubling spot remains.
I bought swabs and used 4-5 to clean the sensor.
The most stubborn spot remains, plus I m
Bob Sullivan wrote:
>To Leon and all who replied,
>
>I've been busy today with sensor cleaning.
>I gave the camera's dust removal function many activations.
>The most troubling spot remains.
>I bought swabs and used 4-5 to clean the sensor.
>The most stubborn spot remains, plus I move some other
Thanks to all who read my problem and offered advice.
I did some wet cleaning but never got the spot to disappear.
I still don't understand how is is there at f22 but gone at f2.8,
but I've sent it to Pentax service in Arizona.
We'll see how they respond.
The rush service option for a fee is gone.
Bob Sullivan wrote:
> I still don't understand how is is there at f22 but gone at f2.8,
I've always rationalised it as small aperture = large depth of field. Spots
come nearly into focus at f11 and smaller. At 2.8 they're so out of focus
they don't register. Is this right anyone?
Chris
--
PDM
On Jun 15, 2010, at 15:07, Chris Mitchell wrote:
> Bob Sullivan wrote:
>> I still don't understand how is is there at f22 but gone at f2.8,
>
> I've always rationalised it as small aperture = large depth of field. Spots
> come nearly into focus at f11 and smaller. At 2.8 they're so out of focus
>
Charles,
I get your explaination, but I look at the distances and light paths
involved and can't imagine much of an angle at f2.8. The opening is a
lot bigger, but that dirt has to be right on top of the sensor...and
the light gets around it ?!!
Regards, Bob S.
On Tue, Jun 15, 2010 at 3:15 PM, C
Charles Robinson wrote
> Subject: Re: Dust spots ;-( Give me some help!
>
> On Jun 15, 2010, at 15:07, Chris Mitchell wrote:
>
> > Bob Sullivan wrote:
> >> I still don't understand how is is there at f22 but gone at f2.8,
> >
> > I've always r
On Tue, Jun 15, 2010 at 03:23:26PM -0500, Bob Sullivan wrote:
> Charles,
> I get your explaination, but I look at the distances and light paths
> involved and can't imagine much of an angle at f2.8. The opening is a
> lot bigger, but that dirt has to be right on top of the sensor...and
> the light
On Jun 15, 2010, at 15:49, John Francis wrote:
> On Tue, Jun 15, 2010 at 03:23:26PM -0500, Bob Sullivan wrote:
>> Charles,
>> I get your explaination, but I look at the distances and light paths
>> involved and can't imagine much of an angle at f2.8. The opening is a
>> lot bigger, but that dirt
On 16/06/2010, John Francis wrote:
> The dust spot isn't "right on top of the sensor" - it's right on top of
> the fromt surface of the protective piece of glass (and anti-aliasing
> filter). If the piece of dust is smaller than 1/2.8 times the thickness
> of that piece of glass there's plenty o
t;Bob Sullivan"
Subject: Re: Dust spots ;-( Give me some help!
Thanks to all who read my problem and offered advice.
I did some wet cleaning but never got the spot to disappear.
I still don't understand how is is there at f22 but gone at f2.8,
but I've sent it to Pentax service in Ar
ob Sullivan"
> Subject: Re: Dust spots ;-( Give me some help!
>
>
>> Thanks to all who read my problem and offered advice.
>> I did some wet cleaning but never got the spot to disappear.
>> I still don't understand how is is there at f22 but gone at f2.8,
>
24 matches
Mail list logo
