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09-23-2017, 12:01 PM   #1
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Any chance for using flash in Pixelshift-mode by letting the flash fire like in HSS?

I ask this, because in HSS the flash is said to actually strobe really quickly.

I think it could also work with a simple (P-TTL) flash that is powerful and capable of strobing real quickly... Like the Sigma 610 DG Super... or something alike.
You would only have to get the flash to fire, but when you are in pixelshift, the hotshoe does not do a move... not one.

I already thought about using a Cactus V6II that releases the camera whilst also releasing the flash(that will strobe with about 60Hz)...


If there is anybody with experience in developing cameras and camera firmware, i would love to hear what you think, could this be achieved by a sysparam mod(so a K-70 for instance would release a flash sitting on the hotshoe even if its in pixelshift mode?

or will i have to go the way around with strobing via releasing with Cactus V6II...

I will let you know when i had success... All that just came to my mind a few hours ago... So I did no testing until now, but maybe others also want to take their try on this:
so if i experience any success i will report in here.
Would be nice to hear if someone else tried flashing in pixelshift mode.

09-23-2017, 01:53 PM   #2
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I seems like you are really asking about a continuous lighting source .... an LED that stays on throughout the whole exposure sequence of the pixel-shift capture would obviously work. An HSS style xenon flash burst would have to be pulsing for quite a long time. How long does it take to expose a pixel-shift image .... is it 4 times the shutter speed setting?
09-23-2017, 02:40 PM   #3
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QuoteOriginally posted by mcgregni Quote
How long does it take to expose a pixel-shift image .... is it 4 times the shutter speed setting?
Yes, with a fraction of a second in between each.

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11-12-2017, 05:58 AM   #4
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The camera would make sure that the flash provides the same output for a fairly long time or for each sot in a series when using longer shutter speeds. As much as I would like a more flexible implementaion for pixel shift, this would be very tricky to do.

11-13-2017, 12:40 PM   #5
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With 1 sec exposure time, strobe 40 times at 60 Hz

I've been struggling with a similar problem when wanting to use shutterless lenses.

My current line of thought is to use strobe mode flash and just manual trigger for each subsequent frame.

I'm having a Canon 550EX which allows setting the rate and number of flash firing. When pushing the test trigger (tried with both Cactus V5 and V6) using button continuously, the flash fires for the specified number of shots. I got a combination of 19 Hz and 50 flashes at the power level setting of 1/128. When going to 20Hz and over, the flash allows only 40 fires. As a note, Cactus RF60 also allows multi strobe, but does full multi strobe run with a single trigger signal.

Pixel shift seems to work on horizontal segments - if just popping the flash once at full power, the pixel shifted image receives exposure only on one segment. A bit similar to banding when going over camera's sync speed, however with pixel shift this happens with e.g. 1 second exposure time.

So the problem is finding the exposure settings where the flash is firing while the camera is going through all segments of each consequent exposure, as mentioned by the previous poster, preferably with constant power. Since doing the triggering manually for each pixel shifted frame if the fire rate * flash amount is too close to frame exposure time, it's difficult to time the shots to the right frame.

After some experimentation, with 1 second exposure time, 40 fires at 60 Hz rate seemed to give pretty even light distribution over the segments. This was 2/3 of the exposure time.

Few test shots with D FA 100mm macro and F 35mm-70mm F3.5-4.5. Both shot at f/11 near to closest focusing distance.


On pixel peeping, the pixel shift seems to give a bit more pop, maybe 10-15% more on the sharp areas. However, overall the pixel shifted image is clearly more pleasant to see, especially in the case of the zoom lens. This seems to support the theory that pixel shift gives relatively largest improvements when the lenses are not of the highest quality.

Can you see which one is pixel shifted and which one not?
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Last edited by ppohja; 11-13-2017 at 01:42 PM.
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