propeller artifacts... please explain the horizontal lines.. this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the...

billgdyoung Loc: Big Bear City, CA

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's shutter or sensor scans?

BobHartung Loc: Bettendorf, IA

billgdyoung wrote:

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's shutter or sensor scans?

Easy peasy. One Google search and presto. Now all you have to do is follow the link and look through the material. Total time to find about 30 seconds.

TonyBot

The phone has no "shutter" as it is scanning continuously (or nearly so), so it is quite probably that the lines are similar to the artifacts you get when you wave your hand with open fingers in front of the TV screen. Or it could be that the windshield and the camera/lens are each, as a result of manufacturing processes, just slightly polarized, and in odd directions. (Ever look out of your car's side windows with polarized lenses? Even though it side window is not "polarized", there are still artifacts attributable to way they are made.)
Of course, my non-technical guesses could be way off.

d3200prime

billgdyoung wrote:

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's shutter or sensor scans?

This issue appears, to me, to be caused by to low of a shutter speed. You need a very high shutter speed to stop motion on plane propellers. A cell phone camera is not fit to stop action of fast moving objects. Just my two cents worth. Good shooting to you.

rehess Loc: South Bend, Indiana, USA

billgdyoung wrote:

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's ashutter or sensor scans?

The important search phrase is "rolling shutter"; current 'electronic shutters' read the sensor one line at a time, and motion effects like this are common, and will be common until electronics reaches the point where 'global shutters' can be implemented.

billgdyoung Loc: Big Bear City, CA

d3200prime wrote:

This issue appears, to me, to be caused by to low of a shutter speed. You need a very high shutter speed to stop motion on plane propellers. A cell phone camera is not fit to stop action of fast moving objects. Just my two cents worth. Good shooting to you.

I agree...but why the horizontal lines... the prop is going in circles....btw, the engine was running about 2500rpm

Bloke Loc: Waynesboro, Pennsylvania

d3200prime wrote:

This issue appears, to me, to be caused by to low of a shutter speed. You need a very high shutter speed to stop motion on plane propellers. A cell phone camera is not fit to stop action of fast moving objects. Just my two cents worth. Good shooting to you.

You don't want too high a shutter speed. A photo with the propellers 'stopped' looks unnatural, and very strange...

Cdouthitt Loc: Traverse City, MI

also look out for rolling shutter with an electronic shutter and fast moving objects.

LWW Loc: Banana Republic of America

billgdyoung wrote:

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's shutter or sensor scans?

It’s caused by an electronic shutter where a DSLR uses a mechanical shutter.

Rongnongno Loc: FL

billgdyoung wrote:

I agree...but why the horizontal lines... the prop is going in circles....btw, the engine was running about 2500rpm

Because it records horizontal lines only and does not go up down repetitively as a video would (giving you the slow motion blade effect).

jerryc41 Loc: Catskill Mts of NY

billgdyoung wrote:

this image was taken with iPhone... don't know the f-stop, shutter speed, ISO... just shot thru the wind shield. Why the horizontal lines? Something to do with the way the phone's shutter or sensor scans?

Bill_de Loc: US

Is this the same issue that occurs with shooting pictures of an old CRT television?

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bkyser Loc: Fly over country in Indiana

BobHartung wrote:

Easy peasy. One Google search and presto. Now all you have to do is follow the link and look through the material. Total time to find about 30 seconds.

Easy peasy....If you don't want to answer a question, then move on to the next thread.
Places like UHH are made specifically for people to ask and answer questions. Maybe it's you that should be somewhere else.
Were you never a beginner? Why do you come here, other than to belittle people who come for knowledge?

Bill_de Loc: US

bkyser wrote:

Easy peasy....If you don't want to answer a question, then move on to the next thread.
Places like UHH are made specifically for people to ask and answer questions. Maybe it's you that should be somewhere else.
Were you never a beginner? Why do you come here, other than to belittle people who come for knowledge?

If you had gone the link he provided you would have found it was the best response given.

Your response answered nothing.

I'll guess you didn't actually look and learn.

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RichJ207 Loc: Sammamish, WA

BobHartung wrote:

Easy peasy. One Google search and presto. Now all you have to do is follow the link and look through the material. Total time to find about 30 seconds.

Bob & Jerryc41,

Perfect, succinct answers. Great to have you here as valuable resources for those who appreciate “just the facts”.