HELP please!!

[emyliano2000]

Hi guys.

I just discovered something with my Canon 700d.

Tuesday was my first ever success @ DSO imaging and I noticed something in my long exposure shots.

I didn't know what it was, I thought that maybe my CLS clip in filter was dirty or maybe there's something on my primary mirror.

It came up to my head about 15 min ago to take a 5 min exposure in absolute darkness to see if I get the same thing on the shot. Here is the result.

The camera has been modified from brand new (not by me) and I haven't done anything to it.

If someone has some knowledge of what can this be please help me. If something went wrong during the modification process I need to send it back.

Here's 2 of the subs (altered with so I can accentuate the problem) taken by me on Tuesday.

[Thalestris24]

Hmm looks like light leaking in from somewhere - is your viewfinder covered?

Louise

[emyliano2000]

Yes, it is. I put the camera with the cap on in a closed box, in a dark cupboard.

[ecuador]

Is the LiveView turned on by any chance?

[emyliano2000]

The camera was on live view but the screen was closed and when it's closed it turns off.

[Mick J]

'Amp Glow'  ?

Whatever possibly heat from circuit board or battery ?  are you using standard battery or powered via a cable is possible.  If this is the cause then you have to learn about dark's an things. As above live view creates heat as well.

[emyliano2000]

Yesterday I took some more shots not in live mode (22 x 5min) with the screen closed and I got the same thing in the shots.

[emyliano2000]

Just now, Mick J said:

Whatever possibly heat from circuit board or battery ?

Outside I use it with a power cord but the one that I just took now it was on battery and just turned on before I took the shot.

[emyliano2000]

I'll go take a 2 min dark shot without the live view and with a different battery .

[ecuador]

Just to make sure, also use the DISP button to have the display forced off. I've only ever seen this sort of amp glow on a Canon due to an LCD...

Oh, and you don't have a lens on, right?

[Thalestris24]

Batteries generate a lot of heat This might be of interest: 

 

[ecuador]

4 minutes ago, Thalestris24 said:

Batteries generate a lot of heat This might be of interest: 

 

Isn't this the wrong side though?

[Thalestris24]

7 minutes ago, ecuador said:

Isn't this the wrong side though?

You'll probably find it's not! The glow you have seems to have some texture - I'm wondering if there's an led on somewhere. It's been discussed on CN and I think an led might have been the culprit: http://www.cloudynights.com/topic/537623-canon-t5i-700d-amp-glow/

[emyliano2000]

here are 2 shots taken with an intervalometer  with the camera wrapped up in a black t-shirt  and powered with a battery.

1st 1 is 5 min @ 12800 ISO and the second one 30 sec @ 12800 ISO

[emyliano2000]

The AMP glow should come up with such a high ISO on a 5 min exposure, shouldn't it?

[emyliano2000]

I think the AMP glow is coming from the red LED that stays on during the exposures. I covered it with some electrical tape.

I'm taking another 5 min shot at 12800 ISO with the camera cap on, viewfinder covered and LCD off in a moderate dark environment (just like outside in my back garden)

I'll post the result in a few min.

 

[emyliano2000]

And here's the result

No AMP glow, right?

[emyliano2000]

10 minutes ago, Thalestris24 said:

You'll probably find it's not! The glow you have seems to have some texture - I'm wondering if there's an led on somewhere. It's been discussed on CN and I think an led might have been the culprit: http://www.cloudynights.com/topic/537623-canon-t5i-700d-amp-glow/

Thanks for that Louise.

Emil.

[Thalestris24]

I'm not certain but there may be a setting which switches the led off

[emyliano2000]

Just now, Thalestris24 said:

I'm not certain but there may be a setting which switches the led off

I'll have to check it out. In the mean time I think it's time for me to shoot off to bed, and keep the tape on the LED, got work tomorrow

[emyliano2000]

I have one more question. 

Should the flat frames be white? When I'm taking mine they turn out a really light blue. I used the white t-shirt method and a really bright white LED light, actually 2, to see the difference, and in both circumstances they are blue? Does it make any difference? 

[Thalestris24]

Hi

It's probably because of your clip filter. It doesn't make any difference. You don't want your flats too bright.

Louise

[emyliano2000]

No, they're  not too bright.

Thanks again Louise ?.

[happy-kat]

Flats histogram should be in the middle I understand. same iso same focus just alter the exposure length to get the histogram where you want it.

[MARS1960]

24 minutes ago, emyliano2000 said:

No, they're  not too bright.

Thanks again Louise ?.

They don't want to be to dark either.

I set my camera to AV put my scope up against my laptop with notepad selected and adjust F-ratio till the histogram is at 50%, this is optimal.