Pattern in image ASI1600mm Pro

astrobug

This is a stack of 20 image of 180 sec on unity gain with a H Alpha filter.

I get some kind of horizontal pattern.

I used APT and PHD2 with randon dithering.

The picture on the left side is mine and on the right side is from someone else with the same septup.

Any suggestions?

I get the same result with and without the calibration frames.

astrobug

It can be best see in the flats.

Are these all dead pixels?

jbarabas

Hi,

I am having the same issue I amafraid... My ASI1600 MM Pro is practically new, after my first sessions I could never process my images without this strange noise pattern ( I also used unity gain ). Could it be better to use the HDR setting instead ?

astrobug

Maybe I'm wrong but do we get this patterns only on the early pro version?

Sam@ZWO

it looks like sensor problem

you can exchange new one from dealer

sorry about this issue, its really hard to check out such problem

astrobug

Thx Sam for the fast repair of my camera. With the bad weather of this week I could only do some falts and they are now good. I hope to do some real life shoots soon.

kotztar

Wow! I have one of the early MM PRO versions, never realized there was such a faulty device sold.

ZWo Team - I have sent a separate email to the support group today, haven't received a response yet.

In context, I sold my 1600mm pro to someone yesterday already having another 1600 mm pro. On comparing his subs to mine, he noticed a lot of dead pixels like the one reported in this thread. Now the camera is back to me :

See for comparison.

image (3).png