Help With Dark band

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mant01
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Location: Durham, UK

Help With Dark band

Post by mant01 »

Ive recently picked up a Canon 80D and having some issues when stacking. I keep getting dark banding on the lower half of the image. For example I did a stack of 200 and 11 of them had the band across the middle. The images were shot at 1/100 with 9 seconds between each shot with 2 flashes. Could it be the shutter is bad? it was brand new so dont understand whats happening. Any help appreciated.

Image

Image

ChrisR
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Post by ChrisR »

Hmmm. How are you triggering your flashes?
Chris R

mant01
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Post by mant01 »

Im using triggers for the flashes, the camera is attached to an electronic rail and the stack started though a laptop.

ChrisR
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Post by ChrisR »

I was wondering if one of the triggers mistimes things.
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mant01
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Post by mant01 »

Do you think that could cause it? the flashes are on either side so I would of thought the line would be from top to bottom down the middle? Ive no idea. The triggers and flashes are just cheap ones.

ChrisR
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Post by ChrisR »

The shutter goes vertically. If the curtain were still there for one of the flashes because it was late, the pic would be darker.
Chris R

mant01
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Post by mant01 »

So you think its a trigger issue and not a shutter one then. I have spares so can try switching things up.

mawyatt
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Post by mawyatt »

Setup details and flash & radio triggers settings/brands would help Chris and others looking into your issues.

Best,

Mike

mant01
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Location: Durham, UK

Post by mant01 »

The set up is a Canon 80D on a RS-90 P rail, 1/100, f4, mag 4.1, mpe 65mm, 2 cheap YN flashes at 1/16 and basic on off triggers.

mawyatt
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Post by mawyatt »

What brand & model triggers?

mant01
Posts: 111
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Post by mant01 »


mawyatt
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Post by mawyatt »

Interesting, I just posted something about RF Triggers today.

https://www.photomacrography.net/forum/ ... hp?t=36246

These Neewers are similar to the ones referenced operating at 433MHz!!

Best,

Mike

mant01
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Location: Durham, UK

Post by mant01 »

Thank you for the info, guess I'll need to change over for better results if it is the triggers causing the issue

rjlittlefield
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Post by rjlittlefield »

Or just use a longer shutter open time, to avoid cutting off part of the delayed strobe's flash.

--Rik

mant01
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Post by mant01 »

rjlittlefield wrote:Or just use a longer shutter open time, to avoid cutting off part of the delayed strobe's flash.

--Rik
I did try a little slower but I'll drop down further and see if that fixes it, thanks

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