Re: #Ricohrama

[Bill]

On 08/01/2015 6:35 AM, Mark Roberts wrote:

P.J. Alling wrote:


If complaining about your equipment makes you Hip, Canon users are the
hippest...


If complaining about your equipment makes you Hip, it's a tie between
Canon and Nikon... and Pentax... and Fuji... and Olympus.



It really is amazing. The more they give us, the unhappier we are.

bill

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Re: Canned Air Debacle

[Bill]

On 09/01/2015 3:03 PM, Brian Walters wrote:

Quoting Bipin Gupta :


By jove, Mark Sir, canned air is never ever used on sensors. The
propellant inside is actually wet and can leave droplets when agitated
or when the air is almost depleted.
This product was developed in the desktop era circa 1980 to clean key
boards, printers etc.




If I remember correctly Bill used to routinely use canned air to
clean the sensors of his DSLRs.  Based on that experience I bought a can
of 'Dust Away' which I used on my *ist DS a couple of times.  Worked
like a charm.

However, since the introduction of dust removal routines on more recent
cameras, I've never felt the need to resort to canned air or wet swab
cleaning.





I try to just use Dust-Off brand canned gas, not generics.
I've never had a problem, but then I don't really go looking for 
problems either.

Did I show you guys the video of my ist-D getting doused with the stuff?
I've found that both my Pentaxes and Fujis don't seem to attract much dust.

bill

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Re: Canned Air Debacle

[David J Brooks]

On Fri, Jan 9, 2015 at 4:03 PM, Brian Walters  wrote:
> Quoting Bipin Gupta :
>
>> By jove, Mark Sir, canned air is never ever used on sensors. The
>> propellant inside is actually wet and can leave droplets when agitated
>> or when the air is almost depleted.
>> This product was developed in the desktop era circa 1980 to clean key
>> boards, printers etc.
>>
>
>
> If I remember correctly Bill Robb used to routinely use canned air to clean
> the sensors of his DSLRs.  Based on that experience I bought a can of 'Dust
> Away' which I used on my *ist DS a couple of times.  Worked like a charm.

Bil also IIRC debunked the floopy mirror on the 6x7. Go Bill

Dave
>
> However, since the introduction of dust removal routines on more recent
> cameras, I've never felt the need to resort to canned air or wet swab
> cleaning.
>
>
>
> --
> Cheers
>
> Brian
>
> ++
> Brian Walters
> Western Sydney Australia
> http://lyons-ryan.org/southernlight/
>
>
>
>
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Re: PESO Seriously?

[Bruce Walker]

Thank you Ann, and Dave, and even Bob. :)

On Wed, Jan 7, 2015 at 8:13 PM, Ann Sanfedele  wrote:
> Thorndike's cat?
>
> purrfic
>
> ann
>
>
> On 1/7/2015 08:56, Bruce Walker wrote:
>>
>> Thank you, Ken. After a while he's starting to associate raising of
>> the lens with the arrival of "Greenies", his favourite snack. This
>> works really well for getting great expressions. Either I'm teaching
>> him or the reverse -- I'm uncertain.
>>
>>
>> On Tue, Jan 6, 2015 at 11:20 AM, Ken Waller  wrote:
>>>
>>> Wonderful pose and capture. You must have asked him to do something!
>>>
>>>
>>> -Original Message-

 From: Bruce Walker 
 Sent: Jan 6, 2015 9:36 AM
 To: Pentax Discuss Mailing List 
 Subject: PESO Seriously?

 My plush model, Gandalf, in a more soft, flattering light. Warning:
 Photo contains cat.

 https://500px.com/photo/94757277/gandalf-by-bruce-walker

 K-3, DA* 16-50/2.8 SDM @ 39mm, f11, 1/125th sec, ISO 100.
 Einstein e640 monolight with 22" beauty dish wearing white diffuser
 sock, camera-right forward (just feathering the subject); white
 foamcore sheet camera-left.
 Post in Lightroom.

 --
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Re: PESO: Near the Peak

[Attila Boros]

Thanks, Mark.

On Fri, Jan 9, 2015 at 11:36 PM, Mark C  wrote:
> Great natural curving lines and layering in the landscape - a really
> pleasing scene.
>
> Mark
>
>
> On 1/6/2015 2:30 PM, Attila Boros wrote:
>>
>> An older photo, taken while hiking in the Carpathians. Pentax K10D and
>> DA 21mm Limited.
>>
>> https://500px.com/photo/94848451/near-the-peak-by-attila-boros
>>
>> Attila
>>
>
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Re: Canned Air Debacle

[Matthew Hunt]

On Fri, Jan 9, 2015 at 5:18 PM, steve harley  wrote:

> i use a Ferenghi ear wax bulb, aka Giottos Rocket; bulkier but with more
> poof

Motto: "Like oo-mox for your sensor!"

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Re: Canned Air Debacle

[steve harley]

On 2015-01-09 14:39 , Paul Stenquist wrote:

An ear wax remover bulb works great.


i use a Ferenghi ear wax bulb, aka Giottos Rocket; bulkier but with more poof



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Re: Canned Air Debacle

[Mark C]

I never would have though that a bitterant would be added to the canned 
air, but it makes sense. It seems to be effective - I felt a little 
nauseous after I tested the sensor...


Mark

On 1/9/2015 11:42 AM, Bipin Gupta wrote:

By jove, Mark Sir, canned air is never ever used on sensors. The
propellant inside is actually wet and can leave droplets when agitated
or when the air is almost depleted.
This product was developed in the desktop era circa 1980 to clean key
boards, printers etc.

Here is an extract from reviews from Amazon com:-

3M does you a dis-service with this can as I noticed that the air
coming out of this can is weaker than some others and leaves particles
on the surfaces I am trying to clean,

I also see much more spray emitted from this can than i've seen out of
others. The instructions say to, "Always hold container upright to
avoid spraying liquid". Regardless of how vertical I hold the thing I
get spray.

It contains a bitterant which is meant to keep people from abusing the
product to get a cheap high. But the bitterant lingers in the air and
makes my tongue and lips numb.
Regards.
Bipin.




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Re: Canned Air Debacle

[Paul Stenquist]

An ear wax remover bulb works great. It produces a clean and reasonably 
powerful blast of air. Keep it in the box it came in, and it will always be 
sanitary.

Paul
> On Jan 9, 2015, at 4:24 PM, Mark C  wrote:
> 
> Yes - I looked at small compressors once for film, but even the smallest was 
> too big. I've had very good luck with the cans I get from Office Depot, but 
> since it is a house brand product there's no guarantee of consistency. At 
> least the sensor cleaned up with the sensor swabs.
> 
> Mark
> 
> On 1/9/2015 8:56 AM, Alan C wrote:
>> Most irritating. I would imagine that most aerosols are prone to delivering 
>> some gunge especially when nearly depleted. What would work well is a mini 
>> lab. bench compressor with a decent filter on the outlet but it would hardly 
>> be cost effective.
>> 
>> Alan C
>> 
>> 
>> -Original Message- From: Mark C
>> Sent: Friday, January 09, 2015 7:34 AM
>> To: Pentax-Discuss Mail List
>> Subject: Canned Air Debacle
>> 
>> Last summer I managed to get a lot of dust and crude on the view screen
>> of my K-3, so I wound up giving it a good cleaning with canned air. A
>> lot of the stuff went onto the sensor, so I blasted it as well without
>> thinking about it. Lo and behold, everything came out nice and clean. I
>> had always been skeptical about using canned air on a sensor, but after
>> this experience I figured that it was OK after all.
>> 
>> SO, today before going out to take snow flake photos I gave the K-01
>> sensor a good blast with a canned air. Looking at my first results - the
>> photos were incredibly spotty and speckled. At first I thought the glass
>> I shoot the crystals on was dirty, but then I noticed a few distinctive
>> spots and speckles that were on each and every frame. So I tested the
>> sensor for dust by putting on a 90mm macro lens, stopping down to f32,
>> and placing the camera face down on a light table.
>> 
>> Here's one of the snowflake shots that alerted me to the issue and the
>> sensor test on the light table:
>> 
>> http://www.markcassino.com/b2evolution/index.php/imgp8714-jpg-1?blog=9
>> 
>> Click the images for a larger file.
>> 
>> I always figured that the problem with canned air would be that it would
>> burp up propellant onto the sensor - but in this case the issue is
>> apparently droplets of oil or something like that. Also - I have used
>> this can to "clean" several rolls of film before scanning. Maybe I
>> should go back and look for the spots because I never noticed them. My
>> guess is that the film grain hides any spots that appear.
>> 
>> I had a few old sensor swabs and a bottle of Eclipse E2 fluid here and
>> was able able to get the sensor cleaned up just fine. It has been years
>> since I did a wet cleaning of a camera sensor. The can of air I used
>> today was 3M, in the past I had used Office Depot's store brand (which
>> is what worked fine on the K-3 sensor). Since the canned air has worked
>> fine int he past, I guess it is simply a difference in quality between
>> brands or maybe I just held the can at the wrong angle today.  At any
>> rate - I am not using canned air on sensors any more!
>> 
>> 
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Re: PESO: Near the Peak

[Mark C]

Great natural curving lines and layering in the landscape - a really 
pleasing scene.


Mark

On 1/6/2015 2:30 PM, Attila Boros wrote:

An older photo, taken while hiking in the Carpathians. Pentax K10D and
DA 21mm Limited.

https://500px.com/photo/94848451/near-the-peak-by-attila-boros

Attila




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Re: Canned Air Debacle

[Mark C]

Yes - I looked at small compressors once for film, but even the smallest 
was too big. I've had very good luck with the cans I get from Office 
Depot, but since it is a house brand product there's no guarantee of 
consistency. At least the sensor cleaned up with the sensor swabs.


Mark

On 1/9/2015 8:56 AM, Alan C wrote:
Most irritating. I would imagine that most aerosols are prone to 
delivering some gunge especially when nearly depleted. What would work 
well is a mini lab. bench compressor with a decent filter on the 
outlet but it would hardly be cost effective.


Alan C


-Original Message- From: Mark C
Sent: Friday, January 09, 2015 7:34 AM
To: Pentax-Discuss Mail List
Subject: Canned Air Debacle

Last summer I managed to get a lot of dust and crude on the view screen
of my K-3, so I wound up giving it a good cleaning with canned air. A
lot of the stuff went onto the sensor, so I blasted it as well without
thinking about it. Lo and behold, everything came out nice and clean. I
had always been skeptical about using canned air on a sensor, but after
this experience I figured that it was OK after all.

SO, today before going out to take snow flake photos I gave the K-01
sensor a good blast with a canned air. Looking at my first results - the
photos were incredibly spotty and speckled. At first I thought the glass
I shoot the crystals on was dirty, but then I noticed a few distinctive
spots and speckles that were on each and every frame. So I tested the
sensor for dust by putting on a 90mm macro lens, stopping down to f32,
and placing the camera face down on a light table.

Here's one of the snowflake shots that alerted me to the issue and the
sensor test on the light table:

http://www.markcassino.com/b2evolution/index.php/imgp8714-jpg-1?blog=9

Click the images for a larger file.

I always figured that the problem with canned air would be that it would
burp up propellant onto the sensor - but in this case the issue is
apparently droplets of oil or something like that. Also - I have used
this can to "clean" several rolls of film before scanning. Maybe I
should go back and look for the spots because I never noticed them. My
guess is that the film grain hides any spots that appear.

I had a few old sensor swabs and a bottle of Eclipse E2 fluid here and
was able able to get the sensor cleaned up just fine. It has been years
since I did a wet cleaning of a camera sensor. The can of air I used
today was 3M, in the past I had used Office Depot's store brand (which
is what worked fine on the K-3 sensor). Since the canned air has worked
fine int he past, I guess it is simply a difference in quality between
brands or maybe I just held the can at the wrong angle today.  At any
rate - I am not using canned air on sensors any more!


---
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protection is active.

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Re: Canned Air Debacle

[Brian Walters]

Quoting Bipin Gupta :


By jove, Mark Sir, canned air is never ever used on sensors. The
propellant inside is actually wet and can leave droplets when agitated
or when the air is almost depleted.
This product was developed in the desktop era circa 1980 to clean key
boards, printers etc.




If I remember correctly Bill Robb used to routinely use canned air to  
clean the sensors of his DSLRs.  Based on that experience I bought a  
can of 'Dust Away' which I used on my *ist DS a couple of times.   
Worked like a charm.


However, since the introduction of dust removal routines on more  
recent cameras, I've never felt the need to resort to canned air or  
wet swab cleaning.




--
Cheers

Brian

++
Brian Walters
Western Sydney Australia
http://lyons-ryan.org/southernlight/



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Re: INFO SOUGHT

[Bruce Walker]

Alan's issue still won't likely be solved because the Adobe ACR linked
to PSE 10 will no longer get updates and so won't get the newer lens
db. PSE 10 was released back in 2011.

Alan, you should buy a copy of PSE 13 (Sept 2014) to get new updates
to ACR with recent lens data.


On Fri, Jan 9, 2015 at 12:34 PM, Paul Sorenson  wrote:
> Does the database show the DA or DA L 55-300?  That should work reasonably 
> well until Adobe comes out with a profile specific to the HD.
>
> -p
>
> Sent from my iPad
>
>> On Jan 9, 2015, at 8:38 AM, Alan C  wrote:
>>
>> Thanks Paul & Jack. PSE10 for the record. I did the update but the HD 55-300 
>> is not there yet. I acquired one in a "shop soiled" box - just a couple of 
>> small dirty marks - for less than half price.
>>
>> Alan C
>>
>> -Original Message- From: Paul
>> Sent: Thursday, January 08, 2015 6:06 PM
>> To: Pentax-Discuss Mail List
>> Subject: Re: INFO SOUGHT
>>
>> I believe the lens database is updated when you update Camera RAW.  Go
>> to HELP > UPDATES...  Any updates available for your version will be
>> shown there and you can select what you want to update.
>>
>> -p
>>
>>> On 1/8/2015 8:55 AM, Alan C wrote:
>>> How does one update the lens recognition database in PSE?
>>>
>>> Alan C
>>>
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Re: INFO SOUGHT

[Paul Sorenson]

Does the database show the DA or DA L 55-300?  That should work reasonably well 
until Adobe comes out with a profile specific to the HD. 

-p

Sent from my iPad

> On Jan 9, 2015, at 8:38 AM, Alan C  wrote:
> 
> Thanks Paul & Jack. PSE10 for the record. I did the update but the HD 55-300 
> is not there yet. I acquired one in a "shop soiled" box - just a couple of 
> small dirty marks - for less than half price.
> 
> Alan C
> 
> -Original Message- From: Paul
> Sent: Thursday, January 08, 2015 6:06 PM
> To: Pentax-Discuss Mail List
> Subject: Re: INFO SOUGHT
> 
> I believe the lens database is updated when you update Camera RAW.  Go
> to HELP > UPDATES...  Any updates available for your version will be
> shown there and you can select what you want to update.
> 
> -p
> 
>> On 1/8/2015 8:55 AM, Alan C wrote:
>> How does one update the lens recognition database in PSE?
>> 
>> Alan C
>> 
>> ---
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Re: Canned Air Debacle

[P.J. Alling]

That's not quiet true, Falcon a manufacturer of darkroom gear, sold a 
compressed freon product was safe for use on negatives and slides, 
called Dust Off.  I expect that would be perfectly safe for sensors. as 
it was for mirrors and focusing screens in film SLRs.  However with the 
Freon ban in most of the industrialized world it is no longer 
available.  For a while the same company produced a similar product 
using different propellent, haven't seen it in years, but I bet that 
would also be perfectly safe for sensors with minimal special handling, 
(It was possible to get Falcon products to spew forth frozen gas, 
usually at an unsuspecting victim with much ensuing hilarity, and 
possible fistfights, but that's another story).


On 1/9/2015 11:42 AM, Bipin Gupta wrote:

By jove, Mark Sir, canned air is never ever used on sensors. The
propellant inside is actually wet and can leave droplets when agitated
or when the air is almost depleted.
This product was developed in the desktop era circa 1980 to clean key
boards, printers etc.

Here is an extract from reviews from Amazon com:-

3M does you a dis-service with this can as I noticed that the air
coming out of this can is weaker than some others and leaves particles
on the surfaces I am trying to clean,

I also see much more spray emitted from this can than i've seen out of
others. The instructions say to, "Always hold container upright to
avoid spraying liquid". Regardless of how vertical I hold the thing I
get spray.

It contains a bitterant which is meant to keep people from abusing the
product to get a cheap high. But the bitterant lingers in the air and
makes my tongue and lips numb.
Regards.
Bipin.




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immortality through not dying.
-- Woody Allen


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Re: Canned Air Debacle

[Igor PDML-StR]

What's canned in the air debacle? ;-)


On a serious note, - let me share my experience.

In my 20+ years of working with small high-purity samples and devices, 
we've been always trying to avoid using compressed air cans for cleaning 
the samples. The proper way has always been to use compressed clean 
nitrogen (it is usually cleaner than the compressed air, because that 
nitrogen was either from a high-purity cylinders or a boil-off from the 
liquid nitrogen tank).
"Cleaning" cans tend to carry particles of the gas, and those leave 
residue. Those are most apparent on the first blow after a break, - you 
can see liquid droplets spat from the nozzle.
Actually, if you must use these cans, - the suggestion is to point the 
first big "spray" away from whatever you are cleaning.


In the past few years, due to the lack of proper infrastructure in some 
labs that my students and I had to use, we occasionally used the aerosol 
cans when nothing else was available.

I can see the residue on the surface of the samples afterwards.

I also know that there are different cans with different "ingredients", - 
some are not as bad as others.


HTH,

Igor

PS. The snowflakes are great, as always!



 Alan C Fri, 09 Jan 2015 06:35:21 -0800 wrote:
Most irritating. I would imagine that most aerosols are prone to 
delivering some gunge especially when nearly depleted. What would work 
well is a mini lab. bench compressor with a decent filter on the outlet 
but it would hardly be cost effective.



Alan C



-Original Message- From: Mark C

Sent: Friday, January 09, 2015 7:34 AM
To: Pentax-Discuss Mail List
Subject: Canned Air Debacle

Last summer I managed to get a lot of dust and crude on the view screen
of my K-3, so I wound up giving it a good cleaning with canned air. A
lot of the stuff went onto the sensor, so I blasted it as well without
thinking about it. Lo and behold, everything came out nice and clean. I
had always been skeptical about using canned air on a sensor, but after
this experience I figured that it was OK after all.

SO, today before going out to take snow flake photos I gave the K-01
sensor a good blast with a canned air. Looking at my first results - the
photos were incredibly spotty and speckled. At first I thought the glass
I shoot the crystals on was dirty, but then I noticed a few distinctive
spots and speckles that were on each and every frame. So I tested the
sensor for dust by putting on a 90mm macro lens, stopping down to f32,
and placing the camera face down on a light table.

Here's one of the snowflake shots that alerted me to the issue and the
sensor test on the light table:

http://www.markcassino.com/b2evolution/index.php/imgp8714-jpg-1?blog=9

Click the images for a larger file.

I always figured that the problem with canned air would be that it would
burp up propellant onto the sensor - but in this case the issue is
apparently droplets of oil or something like that. Also - I have used
this can to "clean" several rolls of film before scanning. Maybe I
should go back and look for the spots because I never noticed them. My
guess is that the film grain hides any spots that appear.

I had a few old sensor swabs and a bottle of Eclipse E2 fluid here and
was able able to get the sensor cleaned up just fine. It has been years
since I did a wet cleaning of a camera sensor. The can of air I used
today was 3M, in the past I had used Office Depot's store brand (which
is what worked fine on the K-3 sensor). Since the canned air has worked
fine int he past, I guess it is simply a difference in quality between
brands or maybe I just held the can at the wrong angle today.  At any
rate - I am not using canned air on sensors any more!


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Canned Air Debacle

[Bipin Gupta]

By jove, Mark Sir, canned air is never ever used on sensors. The
propellant inside is actually wet and can leave droplets when agitated
or when the air is almost depleted.
This product was developed in the desktop era circa 1980 to clean key
boards, printers etc.

Here is an extract from reviews from Amazon com:-

3M does you a dis-service with this can as I noticed that the air
coming out of this can is weaker than some others and leaves particles
on the surfaces I am trying to clean,

I also see much more spray emitted from this can than i've seen out of
others. The instructions say to, "Always hold container upright to
avoid spraying liquid". Regardless of how vertical I hold the thing I
get spray.

It contains a bitterant which is meant to keep people from abusing the
product to get a cheap high. But the bitterant lingers in the air and
makes my tongue and lips numb.
Regards.
Bipin.

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Re: GESO - 2015 Snow Crystals

[Steve Cottrell]

On 7/1/15, Mark C, discombobulated, unleashed:

>First results for this season -
>
>http://www.markcassino.com/b2evolution/index.php/2015-snow-crystals-1
>
>click on the images for larger files.

Fantastic as always.

Love this one:



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Re: New Pentax DSLR & Lenses

[Jaume Lahuerta]

In my case, for a photo camera I much prefer the 645Z or Sony NEX 'tilt only' 
screens rather than the 'fully articulated' that this new model shows. If you 
want to just face it up or down it is much quicker that having to move the 
screen to the side and then turn it up or down.

This kind of screen makes much more sense for a videocamera where the screen is 
on one side, IMHO.

Regards,
Jaume

El Jueves 8 de enero de 2015 19:24, Ken Waller  escribió:



I can see where the tilt screen would be useful on a tripod mounted camera, 
especially for low shots, I only hand hold my Coolpix.


-Original Message-
>From: Stanley Halpin 

>Subject: Re: New Pentax DSLR & Lenses
>
>
>On Jan 8, 2015, at 2:54 AM, Brian Walters  wrote:
>
>> Quoting Ken Waller :
>> 
 While a  tilt screen will be welcome to some, it introduces another 
 mechanical system that can fail, and makes the camera a bit bulkier.
>>> 
>>> I've got a tilt screen back on my Nikon Coolpix 7100 and at most it adds a 
>>> quarter to a half inch to the depth of the body. While it has its usages I 
>>> haven't got into those situations where it is necessary.
>>> 
>> 
>> I've got a tilt screen on my Olympus E-M10.  Useful for low shots and macro 
>> but I usually use the viewfinder.
>> 
>> -- 
>> Cheers
>> 
>> Brian
>> 
>
>I’ve got a tilt screen on my 645z. When shooting on a tripod I often compose 
>through the viewfinder, then go to liveview to evaluate/adjust focus. The tilt 
>screen is very helpful!
>
>stan



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Re: INFO SOUGHT

[Alan C]

Thanks Paul & Jack. PSE10 for the record. I did the update but the HD 55-300 
is not there yet. I acquired one in a "shop soiled" box - just a couple of 
small dirty marks - for less than half price.


Alan C

-Original Message- 
From: Paul

Sent: Thursday, January 08, 2015 6:06 PM
To: Pentax-Discuss Mail List
Subject: Re: INFO SOUGHT

I believe the lens database is updated when you update Camera RAW.  Go
to HELP > UPDATES...  Any updates available for your version will be
shown there and you can select what you want to update.

-p

On 1/8/2015 8:55 AM, Alan C wrote:

How does one update the lens recognition database in PSE?

Alan C

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Re: GESO - More Snowflakes

[Alan C]

You are obviously very patient! Amazing images. I see you are being 
inundated with snow at present. Also that the Snowy Owls are moving south in 
numbers. I think the global warming pundits must be worried. Even here, our 
summer is coolish with a max of 36°C so far - much less than the usual 42°C.


Alan C

-Original Message- 
From: Mark C

Sent: Friday, January 09, 2015 7:06 AM
To: Pentax-Discuss Mail List
Subject: GESO - More Snowflakes

Thanks to everyone who viewed or commented on the last snow crystal
photos. Here are three more from today -

http://www.markcassino.com/b2evolution/index.php/2015-snow-crystals-ii

A crazy cold winter day with lots of snow!

K-3, DFA 50mm f2.8 macro, AF360FGZ flash.

Mark

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Re: Canned Air Debacle

[Alan C]

Most irritating. I would imagine that most aerosols are prone to delivering 
some gunge especially when nearly depleted. What would work well is a mini 
lab. bench compressor with a decent filter on the outlet but it would hardly 
be cost effective.


Alan C


-Original Message- 
From: Mark C

Sent: Friday, January 09, 2015 7:34 AM
To: Pentax-Discuss Mail List
Subject: Canned Air Debacle

Last summer I managed to get a lot of dust and crude on the view screen
of my K-3, so I wound up giving it a good cleaning with canned air. A
lot of the stuff went onto the sensor, so I blasted it as well without
thinking about it. Lo and behold, everything came out nice and clean. I
had always been skeptical about using canned air on a sensor, but after
this experience I figured that it was OK after all.

SO, today before going out to take snow flake photos I gave the K-01
sensor a good blast with a canned air. Looking at my first results - the
photos were incredibly spotty and speckled. At first I thought the glass
I shoot the crystals on was dirty, but then I noticed a few distinctive
spots and speckles that were on each and every frame. So I tested the
sensor for dust by putting on a 90mm macro lens, stopping down to f32,
and placing the camera face down on a light table.

Here's one of the snowflake shots that alerted me to the issue and the
sensor test on the light table:

http://www.markcassino.com/b2evolution/index.php/imgp8714-jpg-1?blog=9

Click the images for a larger file.

I always figured that the problem with canned air would be that it would
burp up propellant onto the sensor - but in this case the issue is
apparently droplets of oil or something like that. Also - I have used
this can to "clean" several rolls of film before scanning. Maybe I
should go back and look for the spots because I never noticed them. My
guess is that the film grain hides any spots that appear.

I had a few old sensor swabs and a bottle of Eclipse E2 fluid here and
was able able to get the sensor cleaned up just fine. It has been years
since I did a wet cleaning of a camera sensor. The can of air I used
today was 3M, in the past I had used Office Depot's store brand (which
is what worked fine on the K-3 sensor). Since the canned air has worked
fine int he past, I guess it is simply a difference in quality between
brands or maybe I just held the can at the wrong angle today.  At any
rate - I am not using canned air on sensors any more!


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Re: GESO - More Snowflakes

[Daniel J. Matyola]

All quite excellent, as usual.

Dan Matyola
http://www.pentaxphotogallery.com/danieljmatyola


On Fri, Jan 9, 2015 at 12:06 AM, Mark C  wrote:
> Thanks to everyone who viewed or commented on the last snow crystal photos.
> Here are three more from today -
>
> http://www.markcassino.com/b2evolution/index.php/2015-snow-crystals-ii
>
> A crazy cold winter day with lots of snow!
>
> K-3, DFA 50mm f2.8 macro, AF360FGZ flash.
>
> Mark
>
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Re: GESO - More Snowflakes

[Attila Boros]

Very nice!

On Fri, Jan 9, 2015 at 7:06 AM, Mark C  wrote:
> Thanks to everyone who viewed or commented on the last snow crystal photos.
> Here are three more from today -
>
> http://www.markcassino.com/b2evolution/index.php/2015-snow-crystals-ii
>
> A crazy cold winter day with lots of snow!
>
> K-3, DFA 50mm f2.8 macro, AF360FGZ flash.
>
> Mark
>
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