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05-28-2016, 03:10 PM   #16
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QuoteOriginally posted by clackers Quote
Wait, wait, wait.

You have an HSS speedlight or strobe attached to it, right, Gedre?
Pentax 450 flash

05-28-2016, 03:46 PM   #17
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QuoteOriginally posted by gedra Quote
Pentax 450 flash
Something very wrong there, Gedra!

05-29-2016, 10:04 AM   #18
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QuoteOriginally posted by gedra Quote
The HSS on Acon does not work on my 645Z. It will let you fire the camera beyond 1/125 but you will get the black band. And I got the $200 version that supposedly be able to use larg strobes too.
Gedra what kind of strobe do you have? Because it all depends on the flash bulb duration or to be more exact the t.5 value. For example the expensive Priolite strobes has t.5 value of 200th/sec, their flash blub stays lit long enough for the 645z shutter to travel across the sensor at amu given shutter speed without banding. Other storbes may not have a long enough flash duration to achieve HSS for all shutter speeds.

I have yet to receive my Acon r930p although I ordered them almost a month ago, but when they do come in I will be able to test them out with different strobe systems to see what kind of shutter values I can on the 645z.
05-29-2016, 05:51 PM   #19
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QuoteOriginally posted by iancx Quote
Gedra what kind of strobe do you have? Because it all depends on the flash bulb duration or to be more exact the t.5 value. For example the expensive Priolite strobes has t.5 value of 200th/sec, their flash blub stays lit long enough for the 645z shutter to travel across the sensor at amu given shutter speed without banding. Other storbes may not have a long enough flash duration to achieve HSS for all shutter speeds.

I have yet to receive my Acon r930p although I ordered them almost a month ago, but when they do come in I will be able to test them out with different strobe systems to see what kind of shutter values I can on the 645z.

Except that he says he has a 'Pentax 450', so I take that to mean a 540 speedlight.

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