ES and barrel distortion

**luckylu** · 01-24-2023, 06:03 AM

I am getting lens barrel distortion with my KP and 55-300plm when using ES but not on MS any ideas on what is causing this Im thinking/hoping it's user error

Last edited by luckylu; 01-24-2023 at 06:08 AM. Reason: insert photos

**ProfessorBuzz** · 01-24-2023, 06:27 AM

That's weird. Do you have the latest firmware 1.31 in the camera? Latest PENTAX KP Firmware Update : Software Downloads | RICOH IMAGING
Were you moving at the time? Or using any light source other than sunlight?

Password1234 · 01-24-2023, 06:47 AM

Stabilisation + electronic shutter ? Stabilisation while reading might be the case, try turning shake reduction of, could be the culprit

**luckylu** · 01-24-2023, 06:54 AM

Originally posted by ProfessorBuzz

That's weird. Do you have the latest firmware 1.31 in the camera? Latest PENTAX KP Firmware Update : Software Downloads | RICOH IMAGING
Were you moving at the time? Or using any light source other than sunlight?

Thanks for reply I do have the latest firmware and only using natural light

photoptimist · 01-24-2023, 06:56 AM - **4 Likes**

It's caused by movement while using ES. Depending on the camera, ES takes about 1/13 sec to expose and collect all the image data even with fastest shutter speed. Although every pixel is only exposed for the set shutter time, pixels at top of the sensor are exposed a significant fraction of a second before pixels at bottom of the sensor are exposed.

Any motion of the camera or subject while using ES will have distortions.

**luckylu** · 01-24-2023, 06:59 AM

Originally posted by Password1234

Stabilisation + electronic shutter ? Stabilisation while reading might be the case, try turning shake reduction of, could be the culprit

Thanks

Shake reduction is off can't switch it on in ES mode

Lens correction is on also but also tried with it off same issue

Live view gives same result

jcdoss · 01-24-2023, 07:04 AM - **5 Likes**

Originally posted by photoptimist

...Any motion of the camera or subject while using ES will have distortions.

An example...

Pentax K-1 mII Limited Silver and K500f4.5 plus 19mm extension at 1/750s and ISO 12800. Aperture unrecorded.

**luckylu** · 01-24-2023, 07:06 AM - **1 Like**

Originally posted by photoptimist

It's caused by movement while using ES. Depending on the camera, ES takes about 1/13 sec to expose and collect all the image data even with fastest shutter speed. Although every pixel is only exposed for the set shutter time, pixels at top of the sensor are exposed a significant fraction of a second before pixels at bottom of the sensor are exposed.

Any motion of the camera or subject while using ES will have distortions.

Thanks

I think that 's it when I think back on taking those It did seem quite a bit longer to process. I don't use ES often but thought to use it for quieter shutter. I guess it gets exaggerated at the longer end as the other times I used it was indoors in a church in Italy at 18mm and no issues there

**Mikesul** · 01-24-2023, 09:30 AM - **1 Like**

jcdoss, that distortion gave a beautiful image!

jcdoss · 01-24-2023, 10:27 AM - **1 Like**

Originally posted by Mikesul

jcdoss, that distortion gave a beautiful image!

Thanks for your comment. I thought so too... That's why I kept it.

Password1234 · 01-24-2023, 07:25 PM

Interesting, I never thought it would be that slow to record, so the movements on long telephoto are exaggerated. The effects on the birds is really nice.

**grizzly** · 11-26-2023, 01:16 AM

I have seen so strong barrel type distortion only with wide angle lens, most probably the ES and some movement can be the reason as it was already mentioned by "photoptimist" and "jcoss".
Otherwise this is a nice robin. Our robins never eat this type of balls, they like the sunflower seeds only

.
What about the exposition time adjusted on the camera (independently from the 1/13 sec)?

01-24-2023, 06:03 AM	#1
luckylu Loyal Site Supporter Join Date: Jan 2019 Photos: Albums Posts: 1,531	ES and barrel distortion I am getting lens barrel distortion with my KP and 55-300plm when using ES but not on MS any ideas on what is causing this Im thinking/hoping it's user error Last edited by luckylu; 01-24-2023 at 06:08 AM. Reason: insert photos

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Article on lens barrel distortion	sbc	Pentax SLR Lens Discussion	5	08-04-2021 01:51 AM
Silkypix and barrel distortion	trevorg	Digital Processing, Software, and Printing	14	06-29-2015 06:26 PM
barrel distortion with a 30mm lens	everydaylife	Pentax SLR Lens Discussion	7	07-26-2014 09:55 AM
15mm or 21 mm? which is better controlling barrel distortion	dh4412	Troubleshooting and Beginner Help	6	11-01-2011 02:09 PM
software that will “flatten” or adjust for barrel distortion?	barryr	Digital Processing, Software, and Printing	7	04-24-2008 08:31 PM

01-24-2023, 06:27 AM	#2
ProfessorBuzz Loyal Site Supporter Join Date: Feb 2018 Posts: 1,903	That's weird. Do you have the latest firmware 1.31 in the camera? Latest PENTAX KP Firmware Update : Software Downloads \| RICOH IMAGING Were you moving at the time? Or using any light source other than sunlight?

01-24-2023, 06:47 AM	#3
Password1234 Senior Member Join Date: Apr 2017 Location: Montreal Photos: Gallery Posts: 143	Stabilisation + electronic shutter ? Stabilisation while reading might be the case, try turning shake reduction of, could be the culprit

01-24-2023, 06:54 AM	#4
luckylu Loyal Site Supporter Join Date: Jan 2019 Photos: Albums Posts: 1,531 Original Poster	Originally posted by ProfessorBuzz That's weird. Do you have the latest firmware 1.31 in the camera? Latest PENTAX KP Firmware Update : Software Downloads \| RICOH IMAGING Were you moving at the time? Or using any light source other than sunlight? Thanks for reply I do have the latest firmware and only using natural light

01-24-2023, 06:56 AM - 4 Likes	#5
photoptimist Pentaxian Join Date: Jul 2016 Photos: Albums Posts: 5,126	It's caused by movement while using ES. Depending on the camera, ES takes about 1/13 sec to expose and collect all the image data even with fastest shutter speed. Although every pixel is only exposed for the set shutter time, pixels at top of the sensor are exposed a significant fraction of a second before pixels at bottom of the sensor are exposed. Any motion of the camera or subject while using ES will have distortions.

01-24-2023, 06:59 AM	#6
luckylu Loyal Site Supporter Join Date: Jan 2019 Photos: Albums Posts: 1,531 Original Poster	Originally posted by Password1234 Stabilisation + electronic shutter ? Stabilisation while reading might be the case, try turning shake reduction of, could be the culprit Thanks Shake reduction is off can't switch it on in ES mode Lens correction is on also but also tried with it off same issue Live view gives same result

01-24-2023, 07:04 AM - 5 Likes	#7
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,769	Originally posted by photoptimist ...Any motion of the camera or subject while using ES will have distortions. An example... Pentax K-1 mII Limited Silver and K500f4.5 plus 19mm extension at 1/750s and ISO 12800. Aperture unrecorded.

01-24-2023, 07:06 AM - 1 Like	#8
luckylu Loyal Site Supporter Join Date: Jan 2019 Photos: Albums Posts: 1,531 Original Poster	Originally posted by photoptimist It's caused by movement while using ES. Depending on the camera, ES takes about 1/13 sec to expose and collect all the image data even with fastest shutter speed. Although every pixel is only exposed for the set shutter time, pixels at top of the sensor are exposed a significant fraction of a second before pixels at bottom of the sensor are exposed. Any motion of the camera or subject while using ES will have distortions. Thanks I think that 's it when I think back on taking those It did seem quite a bit longer to process. I don't use ES often but thought to use it for quieter shutter. I guess it gets exaggerated at the longer end as the other times I used it was indoors in a church in Italy at 18mm and no issues there

01-24-2023, 09:30 AM - 1 Like	#9
Mikesul Loyal Site Supporter Join Date: Sep 2009 Location: Phoenix, AZ Posts: 7,594	jcdoss, that distortion gave a beautiful image!

01-24-2023, 10:27 AM - 1 Like	#10
jcdoss Pentaxian Join Date: Nov 2012 Location: Ingelheim am Rhein, Germany Photos: Gallery \| Albums Posts: 6,769	Originally posted by Mikesul jcdoss, that distortion gave a beautiful image! Thanks for your comment. I thought so too... That's why I kept it.

01-24-2023, 07:25 PM	#11
Password1234 Senior Member Join Date: Apr 2017 Location: Montreal Photos: Gallery Posts: 143	Interesting, I never thought it would be that slow to record, so the movements on long telephoto are exaggerated. The effects on the birds is really nice.

11-26-2023, 01:16 AM	#12
grizzly Loyal Site Supporter Join Date: Feb 2015 Location: Szárliget Photos: Gallery \| Albums Posts: 398	I have seen so strong barrel type distortion only with wide angle lens, most probably the ES and some movement can be the reason as it was already mentioned by "photoptimist" and "jcoss". Otherwise this is a nice robin. Our robins never eat this type of balls, they like the sunflower seeds only . What about the exposition time adjusted on the camera (independently from the 1/13 sec)?