Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-20-2016, 07:00 PM   #1
Veteran Member




Join Date: Dec 2010
Location: 11432
Photos: Albums
Posts: 382
Pixel shift for studio photography

I'm not sure if Pixel shift work for studio works. You know how strobes and power pack's mechanism. But pixel shift require multiple shots. Any ideas for studio photography especially with still life and portrait?

04-20-2016, 07:09 PM   #2
Pentaxian
Paul the Sunman's Avatar

Join Date: Aug 2011
Location: Melbourne
Photos: Gallery
Posts: 1,298
Not with strobes is my understanding.
04-20-2016, 07:09 PM   #3
Site Supporter
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,664
This is covered by both the K-3II and recently available K-1 manuals. The short answers go like this:
  • Incompatible with flash
  • Cannot be used in X mode
  • Exposure for continuous lighting is the same as with non-PS

Steve
04-20-2016, 07:13 PM   #4
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,680
Pixel shift is only useful when you're shooting a perfectly stationary subject (i.e. something inanimate). There's just too much movement if you're doing portraits- remember we're talking microns.

I'm not sure if they were every published, but we shot a lot of studio samples when testing the K-3 II. The pixel shifted files ended up having a good amount of artifacts, especially in hair.

You would also need four back-to-back flashes, though I don't recall if the camera even triggers the flash in PS mode. A constant light source is probably what you'd need, given you're shooting something other than a person


Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

04-20-2016, 07:13 PM - 1 Like   #5
Pentaxian
Edgar_in_Indy's Avatar

Join Date: May 2010
Location: Indiana, USA
Photos: Gallery
Posts: 2,637
Although somewhat annoyingly, Olympus does allow their pixel shift implementation to be used with flashes by spacing out the exposures long enough for a flash to cycle. I wish Pentax would do the same.

Since I do product photography in a studio, my subjects are stationary, so it would potentially be useful.

Last edited by Edgar_in_Indy; 04-21-2016 at 04:32 AM.
04-20-2016, 08:51 PM   #6
Senior Member




Join Date: Mar 2013
Location: So-central, MI / Central, IN
Posts: 173
I would also strongly like to see Pentax offer studio flash capability for stationary pixel shift applications in the near distant future!

(As a former medium and large format studio enthusiast back in the film days. Would love to head back toward studio stills work sometime in the future.)
04-20-2016, 11:26 PM   #7
Site Supporter
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,664
QuoteOriginally posted by Adam Quote
though I don't recall if the camera even triggers the flash in PS mode.
My guess would be that it does not.


Steve
04-21-2016, 02:59 PM - 2 Likes   #8
sbh
Site Supporter
Site Supporter




Join Date: Oct 2012
Posts: 222
I would love to see a PS + flash solution. There are modern LED continuous lights that look and work just like studio flashes (with bowens mount etc.) but using existing equipment would be preferable of course.

There is a "hack" that I would like to try but I currently don't have a pixelshift machine. Set speedlights (e.g. the YN560III) in strobe mode and trigger them at the same time as the camera. For example: Exposure 1/4 second (= 4 exposures in one second) and the strobes to 4 flashes at a frequency of 4 per second. That should roughly match the four pixelshift exposures. But I have no idea whether that works out in practice.

05-13-2016, 05:24 PM - 1 Like   #9
sbh
Site Supporter
Site Supporter




Join Date: Oct 2012
Posts: 222
Ok so I tried this now in a quick test with the YN 560III. Somehow it doesn't work as I described above. Synchronizing Pixelshift and flash wasn't possible. The four exposures seem to be in an irregular sequence instead of exactly 1/4 of the total time each. There are always one or more frames that are un-exposed or only partly flashed.

However, what works is setting a long exposure and trigger the flash manually by hand. For example: 1.5 second exposures are manageable. Press the shutter and then trigger the flash four times. The display shows the sequence of the four images taken in real-time. This helps to get the timing right.

But: The flash brightness needs to be _exactly_ the same. Otherwise the colours will be off. If one of the frames is brighter or darker, then this will be visible as a colour cast. For example, a brighter capture of the red-pixel-frame will be clearly visible as red-ish cast in white areas.

Motion detection kills these artifacts but then the PS benefit is also gone since it affects the entire image.

I want to try it in more detail with studio strobes, but for now it looks like continuous lighting will be the way to go.

(And coming from the K-5iis, I learned that PS isn't something to hammer away one frame after the other. A 32GB card will fill up rather swiftly...)
05-13-2016, 05:48 PM   #10
Site Supporter
Site Supporter




Join Date: Mar 2016
Posts: 110
No idea what, if any, benefit was gleamed here, but these are two jpegs with PS and MC active... camera is handheld, not much wind... but these were 'just because'
One has to wonder how the in camera algorithm works with scenes totally not appropriate for this purpose.
Attached Images
View Picture EXIF
PENTAX K-1  Photo 
View Picture EXIF
PENTAX K-1  Photo 
05-13-2016, 05:57 PM   #11
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,878
QuoteOriginally posted by Adam Quote
Pixel shift is only useful when you're shooting a perfectly stationary subject
With professional studio flash units having durations upwards of T.1=1/500th and over, you would think flash would actually be a benefit in this scenario. Pentax clearly thinks differently. Hasselblad Multi-shot backs allow for studio flash use in multi-shot mode - but Hasselblad strongly recommend that 1] flash units must have rapid cycle times, under 1s. 2] multi-shot mode is only usable for still life subjects, all things considered is an easy caveat to accept.

Last edited by Digitalis; 05-14-2016 at 01:52 AM.
05-13-2016, 11:19 PM   #12
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,680
QuoteOriginally posted by Digitalis Quote
With professional studio flash units having duration upwards of T.1=1/500th and over, you would think flash would actually be a benefit in this scenario. Pentax clearly thinks differently. Hasselblad Multi-shot backs allow for studio flash use in multi-shot mode - but Hasselblad strongly recommend that 1] flash units must have rapid cycle times, under 1s. 2] multi-shot mode is only usable for still life subjects*, all things considered is an easy caveat to accept.
If implemented properly, I guess. Right now the camera pauses for a bit between each sensor readout.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

05-19-2016, 10:19 AM   #13
Senior Member




Join Date: Mar 2016
Posts: 155
Pixel shift will work perfectly find with continuous lighting solutions and where your subject doesn't have a tonne of motion (a little motion with pixel shift MC works fine though).

Certainly it would not stop me using pixel shift with a model with the K1 in situations where I couldnt' use pixel shift with the K3ii.

Rotolight Neo make some fantastic lights as to ffiilex
Fiilex P180E First Impressions


On an aside I've been impressed with the number of situations that I can actually use pixel shift with so far - running water streams etc.. cars moving in background for cityscape etc...
05-26-2016, 03:36 PM   #14
Loyal Site Supporter
Loyal Site Supporter
qdfb's Avatar

Join Date: May 2016
Location: Saffron Walden, UK
Posts: 12
QuoteOriginally posted by One3rdEV Quote
I would also strongly like to see Pentax offer studio flash capability for stationary pixel shift applications in the near distant future!

(As a former medium and large format studio enthusiast back in the film days. Would love to head back toward studio stills work sometime in the future.)
Petax might be able to add a firmware fix to allow this. It seems like an odd oversight not to have made the K1 suitable for use with studio flash. Pixel shift is the K1's big selling point and it should be liberated for studio use, where it would excel. I have a Hasselblad H5D200MS and its great but a Pentax K1 is closer to it than you would think.
05-26-2016, 06:30 PM   #15
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,680
QuoteOriginally posted by qdfb Quote
Petax might be able to add a firmware fix to allow this. It seems like an odd oversight not to have made the K1 suitable for use with studio flash. Pixel shift is the K1's big selling point and it should be liberated for studio use, where it would excel. I have a Hasselblad H5D200MS and its great but a Pentax K1 is closer to it than you would think.
Since pixel shift requires a stationary subject, what would prevent you from using a floodlight along with a longer exposure time instead? Just curious regarding practical use cases.

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)



PentaxForums.com's high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
24x36mm, arc, bulbs, energy, flash, format, full-frame, lights, matter, medium, pentax, photography, pixel, pixel shift, power, quality, requirements, shift, shift for studio, shot, sigma, situations, strobe, studio, terms, units
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lightroom support for Pixel Shift RAWs Zen4Life Pentax K-3 4 03-10-2016 02:56 PM
K-3 ii Pixel shift for slide/negative copying? Clarkey Pentax K-3 9 01-23-2016 09:16 AM
Which Support for K3II Astrotracer or Pixel Shift Feature Use C_Jones Pentax Camera and Field Accessories 33 11-25-2015 12:40 PM
Pixel shift for landscapes seachongo Pentax DSLR Discussion 12 06-25-2015 03:25 PM
K-3 II Pixel shift for Macro? Omestes Pentax K-3 6 06-12-2015 08:13 PM



All times are GMT -7. The time now is 09:22 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top