Win a Pentax Limited Lens: Raffle Now Live!

KxBlaze · 10-08-2010, 10:21 AM

Those corrections take time to process and will therefore make you have to wait a bit longer between shots. This can be very annoying especially if you want to take continuous shots. So I would suggest using them if you are shooting still objects one at a time and turn them off if you are shooting movement continuously.

**mattb123** · 10-08-2010, 10:45 AM

I tried correction with my DA15 but turned it off because I didn't like the lag. I also don't mind how the DA15 looks without correction for the kind of shots I typically take.

robgo2 · 10-08-2010, 12:47 PM

Originally posted by brofkand

I don't use those settings. Normally the Chromatic Aberration on modern lenses is so low it never shows up on prints, plus it slows down writing of shots to your card.

On my K-7, it's out of commission for at least 2 seconds after I take a shot so it can process the image and take out CA.

Like I said, the level of CA in modern lenses is so low it's a non-issue. And if it is an issue in say one out of 100 shots, it's trivial to take out in Photoshop or Lightroom in PP. Like I said, although a review of a lens may say it has CA, when you actually print the image I'd bet you a nickel you won't see it.

I don't agree that CA is a non-issue with modern lenses, but it is usually very easy to remove with software either in the raw stage or in Photoshop. Hence, I do not bother with it in the camera, especially since it does apply to raw capture.

Rob

kh1234567890 · 10-09-2010, 04:25 AM

The correction parameters are stored in the EXIF but at present no software, including the Pentax DCU4, is capable of using this data. Maybe one day

So if you shoot RAW and do not process to JPEG in-camera then there is little point in having it turned on. The data is stored in the RAW EXIF regardless.

kh1234567890 · 10-31-2010, 03:03 PM

The latest version of the Pentax DCU, 4.31 appears to actually use the stored lens correction parameters - two new 'auto' check-boxes have appeared in the interface. It seems to work as effectively as the in-camera processing on the couple of lenses that I've tried.

Hopefully now that Pentax have told SilkyPix how to do it, it will also find its way into SilkyPix Developer Studio Pro. The Pentax DCU is such a pain to use. So slow and antiquated.

secateurs · 10-31-2010, 03:58 PM

so lens correction is basically in lieu of actually making better-quality lenses with less CA and distortion in the first place?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Testing a new lens: good or bad copy?	Edmund	Pentax SLR Lens Discussion	3	06-13-2010 10:30 PM
seeking wisdom on lens brands..good,bad,ugly	arkansas72762	Pentax SLR Lens Discussion	8	01-14-2009 10:35 AM
BAD Idea	sabarrett	Photographic Technique	8	08-20-2008 08:33 AM
Help: general tips to test for good/bad lens copy	tdb	Pentax SLR Lens Discussion	4	04-10-2008 09:13 AM
35mm Macro: is this a bad idea?	kmccanta	Pentax SLR Lens Discussion	15	02-27-2007 06:20 AM

10-08-2010, 10:21 AM	#16
KxBlaze Veteran Member Join Date: Feb 2010 Location: California Photos: Gallery Posts: 1,602	Those corrections take time to process and will therefore make you have to wait a bit longer between shots. This can be very annoying especially if you want to take continuous shots. So I would suggest using them if you are shooting still objects one at a time and turn them off if you are shooting movement continuously.

10-08-2010, 10:45 AM	#17
mattb123 Site Supporter Join Date: Apr 2010 Location: Colorado High Country Photos: Gallery Posts: 10,874	I tried correction with my DA15 but turned it off because I didn't like the lag. I also don't mind how the DA15 looks without correction for the kind of shots I typically take.

10-08-2010, 12:47 PM	#18
robgo2 Veteran Member Join Date: Jan 2007 Location: New Mexico Photos: Albums Posts: 1,125	Originally posted by brofkand I don't use those settings. Normally the Chromatic Aberration on modern lenses is so low it never shows up on prints, plus it slows down writing of shots to your card. On my K-7, it's out of commission for at least 2 seconds after I take a shot so it can process the image and take out CA. Like I said, the level of CA in modern lenses is so low it's a non-issue. And if it is an issue in say one out of 100 shots, it's trivial to take out in Photoshop or Lightroom in PP. Like I said, although a review of a lens may say it has CA, when you actually print the image I'd bet you a nickel you won't see it. I don't agree that CA is a non-issue with modern lenses, but it is usually very easy to remove with software either in the raw stage or in Photoshop. Hence, I do not bother with it in the camera, especially since it does apply to raw capture. Rob

10-09-2010, 04:25 AM	#19
kh1234567890 Veteran Member Join Date: Sep 2010 Location: Manchester, UK Photos: Gallery Posts: 2,653	The correction parameters are stored in the EXIF but at present no software, including the Pentax DCU4, is capable of using this data. Maybe one day So if you shoot RAW and do not process to JPEG in-camera then there is little point in having it turned on. The data is stored in the RAW EXIF regardless.

10-31-2010, 03:03 PM	#20
kh1234567890 Veteran Member Join Date: Sep 2010 Location: Manchester, UK Photos: Gallery Posts: 2,653	The latest version of the Pentax DCU, 4.31 appears to actually use the stored lens correction parameters - two new 'auto' check-boxes have appeared in the interface. It seems to work as effectively as the in-camera processing on the couple of lenses that I've tried. Hopefully now that Pentax have told SilkyPix how to do it, it will also find its way into SilkyPix Developer Studio Pro. The Pentax DCU is such a pain to use. So slow and antiquated.

10-31-2010, 03:58 PM	#21
secateurs Senior Member Join Date: Oct 2010 Location: Adelaide, Australia Photos: Albums Posts: 250	so lens correction is basically in lieu of actually making better-quality lenses with less CA and distortion in the first place?

Lens Correction: Good or Bad Idea?

Win a Pentax Limited Lens: Raffle Now Live!