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FORUMS Photography Talk by Genre Astronomy & Celestial Talk
Thread started 25 Jun 2017 (Sunday) 19:50
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Doing long exposure tests weird band across image.

 
Mike ­ Photo
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Boston, Ma
Jun 25, 2017 19:50 |  #1

Hi all,

Im new to Astrophotography and Im reviewing a long exposure tracker. I did some test shots and on one squence of shots I got this weird band of yellow across the screen. Is this some sort of light leak or something with the sensor?

Any info would be great thanks.

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Archibald
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Jun 25, 2017 20:09 |  #2

You got me guessing...

Can't see any yellow band.

??


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Mike ­ Photo
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Jun 25, 2017 20:11 |  #3

There I made it easier to see.

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Archibald
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Jun 25, 2017 20:26 |  #4

Yes, I can see it now.

Only on some shots?


Hasselblad 500 C/M with 80mm/2.8 Zeiss Planar (trying to sell it); Pentax Spotmatic F with 28/3.5, 50/1.4, 50/1.8, 135/3.5; Canon digital gear
C&C always welcome.
Picture editing OK

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Mike ­ Photo
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Jun 28, 2017 22:51 |  #5

Well I thought it was only one sequence but if I boost the exposure of some others its there just really faint. It seems to be more obvious in this shot though. I shot some more tonight and its there again. I also thought maybe it was from live view but i turned it off and that didnt help.


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MIKE PHOTO
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Lenses: Canon 70-200 L, Canon 50 1.4, Canon EF-S 18-55 3.5-5.6 II(reversed element for macro), Sigma Art 18-35 1.8, Tamron 24-70 2.8

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Celestron
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Texas USA
Jun 29, 2017 17:24 |  #6

The only time I have seen banding similar to this is when I had high line wires hanging in front of my view . In any of your software do you have any debanding steps you can use ?




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Davenn
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Sydney, Australia
Sep 08, 2017 03:59 |  #7

Mike Photo wrote in post #18389440 (external link)
Well I thought it was only one sequence but if I boost the exposure of some others its there just really faint. It seems to be more obvious in this shot though. I shot some more tonight and its there again. I also thought maybe it was from live view but i turned it off and that didnt help.


Knowing your thread is a few months old

did you resolve this ?

if not, I would suggest that you do some shots with the lens cap on and see if it's still there

then take the lens off the camera and put on the dust cap that goes over the body opening

if still there ... then it's pointing to possibly a sensor problem


Dave


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Doing long exposure tests weird band across image.
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