Luminous Landscape Forum

Equipment & Techniques => Landscape & Nature Photography => Topic started by: Lonnie Utah on June 08, 2015, 11:45:11 am

Title: An ounce of prevention...
Post by: Lonnie Utah on June 08, 2015, 11:45:11 am
So went on a family (not really a photo) vacation recently. In the process of streaming lining my photo bag to something smaller (that could fit in an overhead bin on the plane), I left my rocket blower on home....

(http://www.LANDSHAPEPHOTOGRAPHY.com/img/s12/v183/p1236021135-5.jpg)

But here was the end result...

(http://www.LANDSHAPEPHOTOGRAPHY.com/img/s7/v153/p1235195217-5.jpg)

Edit: I forgot the particulars:
Focal Length 24mm
Shutter Speed 1s
Aperture f/22
ISO 100
-2 stop ND grad.
Title: Re: An ounce of prevention...
Post by: Slobodan Blagojevic on June 08, 2015, 12:00:19 pm
What camera do you use!? I have not had issues with dust spots ever since the days of Canon 20D. Nice photo, btw. :)
Title: Re: An ounce of prevention...
Post by: Lonnie Utah on June 08, 2015, 12:09:06 pm
Quote from: Slobodan Blagojevic on June 08, 2015, 12:00:19 pm
What camera do you use!? I have not had issues with dust spots ever since the days of Canon 20D. Nice photo, btw. :)

I was using my venerable A900.  Generally a few little puffs from the blower and all is good.  About 1x a year I'll clean it using a sensor swab... :)

Edit: The spots are definitely worse shooting at small apertures. (This was F/22....)
Title: Re: An ounce of prevention...
Post by: Jeremy Roussak on June 08, 2015, 04:56:31 pm
Quote from: Lonnie Utah on June 08, 2015, 12:09:06 pm
Edit: The spots are definitely worse shooting at small apertures. (This was F/22....)

I wish someone would try to explain to me why - and how - aperture makes the slightest difference to the effects of sensor dust. I've tried, but I just can't work it out.

Jeremy
Title: Re: An ounce of prevention...
Post by: Lonnie Utah on June 08, 2015, 05:04:10 pm
Quote from: kikashi on June 08, 2015, 04:56:31 pm
I wish someone would try to explain to me why - and how - aperture makes the slightest difference to the effects of sensor dust. I've tried, but I just can't work it out.

A picture is worth 1,000 words.  :)

https://photographylife.com/why-sensor-dust-is-more-visible-at-small-apertures

(https://cdn.photographylife.com/wp-content/uploads/2012/01/Dust-on-Sensor.png)
Title: Re: An ounce of prevention...
Post by: Slobodan Blagojevic on June 08, 2015, 06:06:54 pm
Quote from: Lonnie Utah on June 08, 2015, 05:04:10 pm
A picture is worth 1,000 words.  :)

(http://static.rcgroups.net/forums/attachments/3/5/2/3/0/8/a3930971-193-clap-animated-animation-clap-smiley-emoticon-000340-large.gif?d=1302434801)
Title: Re: An ounce of prevention...
Post by: Jeremy Roussak on June 11, 2015, 03:50:51 am
Quote from: Lonnie Utah on June 08, 2015, 05:04:10 pm
A picture is worth 1,000 words.  :)

https://photographylife.com/why-sensor-dust-is-more-visible-at-small-apertures


Thank you, sir. Light dawns, or at least begins to dawn: I need to think more about the effect of a lens focussing the light.

Jeremy