Jack Sofield

Lives in United States Seymour, TN, United States
Works as a Retired Medical Physicist
Joined on Jun 2, 2006

Comments

Total: 16, showing: 1 – 16
On challenge Panorama (3 comments in total)

sorry, my error, was looking at the wrong pano challenge.

Link | Posted on Mar 1, 2016 at 20:35 UTC as 1st comment
On challenge Panorama (3 comments in total)

May I know why my entry, Cowboys Stadium, was removed?

Link | Posted on Mar 1, 2016 at 20:32 UTC as 2nd comment
On photo formation in the F-15 Eagle challenge (1 comment in total)

These are NOT F-15 Eagles! They are FA-18 Hornets.

Link | Posted on Feb 20, 2016 at 15:25 UTC as 1st comment
On photo Super Hornet in the Jet Engine Aircraft challenge (2 comments in total)
In reply to:

Jack Sofield: That is NOT breaking the sound barrier. It is the rapid expansion of a pressure wave that cools and condenses the moist air. It is a well known effect and has the name, which I cannot remember, of the people who first analyzed it.
Jack C. Sofield

Just looked it up, it is known as the Prandtl-Glauert singularity.
JCS

Link | Posted on Nov 12, 2015 at 15:01 UTC
On photo Super Hornet in the Jet Engine Aircraft challenge (2 comments in total)

That is NOT breaking the sound barrier. It is the rapid expansion of a pressure wave that cools and condenses the moist air. It is a well known effect and has the name, which I cannot remember, of the people who first analyzed it.
Jack C. Sofield

Link | Posted on Nov 12, 2015 at 14:40 UTC as 1st comment | 1 reply
On challenge MiGs (2 comments in total)

You deleted my entry because you said it did not have the 1400 pixels on the long side. The rule was "at least 1400 pixels on long side." Mine had 1600. Why the disqualification?
Jack Sofield

Link | Posted on Mar 27, 2015 at 00:52 UTC as 1st comment | 1 reply
On Challenge:8870 (2 comments in total)

Reason for disqualification???

Posted on Nov 20, 2013 at 14:09 UTC as 1st comment | 1 reply
On photo Spiny Lobster in the Underwater challenge (1 comment in total)

Taken in the Florida Keys

Link | Posted on May 8, 2013 at 20:40 UTC as 1st comment
On Challenge:7377 (5 comments in total)

You have a capture date rule in your heading, but in the list of rules you say no restriction for capture date. I am confused. Which is it?

Posted on Sep 18, 2012 at 14:05 UTC as 5th comment | 1 reply
On photo F-18E Super Hornet With Compression Wave in the Military Jet Fighters challenge (24 comments in total)
In reply to:

jzs147r: really? 105mm lenses can take this? u fly very close to him?

Picture taken from the ground. Plane was flying very low. Picture was zoomed during post processing.

Link | Posted on Sep 12, 2012 at 13:21 UTC
On photo F-18E Super Hornet With Compression Wave in the Military Jet Fighters challenge (24 comments in total)

Thanks to all of you who posted a reply. I appreciate your kindness and encouraging comments.

Link | Posted on Sep 12, 2012 at 13:19 UTC as 4th comment
On photo F-18E Super Hornet With Compression Wave in the Military Jet Fighters challenge (24 comments in total)
In reply to:

jzs147r: really? 105mm lenses can take this? u fly very close to him?

Taken from the ground. Zoom in during post processing.

Link | Posted on Sep 12, 2012 at 13:16 UTC
On photo F-18E Super Hornet With Compression Wave in the Military Jet Fighters challenge (24 comments in total)
In reply to:

adamharper: I wonder if the submitter is the same guy who actually took this photo?
http://www.pbase.com/jcsofield/image/128649581

No question about it.

Link | Posted on Sep 3, 2012 at 14:42 UTC
On photo F-18E Super Hornet With Compression Wave in the Military Jet Fighters challenge (24 comments in total)
In reply to:

Ben O Connor: Sir no offence, i remember i´ve seen this image before. And the plane is F-14 (which is not flying primarily anymore). So did you take this with a film camera or ... ?

You do not know your jet fighter planes. This is an F-18E Super Hornet. It is a digital picture all the way.

Link | Posted on Sep 3, 2012 at 14:30 UTC
On photo Lake Louise in the Mountain lakes challenge (2 comments in total)
In reply to:

larrys0411: Beautiful!

Thank you Larry. You are very kind.

Link | Posted on Apr 5, 2012 at 00:58 UTC
On photo Fire One in the Creative U/W Photography challenge (2 comments in total)
In reply to:

ema-art: Congrats for the 2nd place. Great work!

Thanks ema-art. Your first place was well deserved.

Link | Posted on Jan 24, 2012 at 18:05 UTC
Total: 16, showing: 1 – 16