Issue with T5i view finder when shooting stars.

Lemming51 wrote:

patsies62 wrote:

I briefly read some of the comments but I need to clarify one major mistake I made in this post.

1) I am talking about live view not the view finder... Sorry for the stupid silly confusion...

2) As far as the lens settings and what I was shooting at this is the information

Lens: 70-200MM f/4 L
Focal Length : 200MM
ISO: 1600
Shutter speed varied from 30-45 seconds.

I was using a skyguider pro and trying to verify it was tracking well and that I was indeed aligned with Polaris so I tried a few shots at 45 seconds and I increased the ISO to 3200 a shot a few shots at a shutter of 5-10 seconds. I finally shot a shot of 45 seconds at ISO 3200 and I got my the live view to stop working. The screen went totally dark. ...

+ 1 to Helen's response. It sounds to me that you have Long Exposure Noise Reduction enabled. pp. 127-128 of the 700D/T5i instruction manual. Whether using the viewfinder or live view it takes a 2nd exposure with the shutter curtains closed for the same length of time as your initial exposure. Shooting with the viewfinder, it remains dark because the mirror is up. Shooting with live view the monitor is completely black because the 2nd noise reduction exposure is with the shutter curtains closed.

Thanks - that saved me a long, waffly sequel (my style, unfortunately!!) adding that it could still be Long Exposure NR in live view too.  The OP's fear of overheating probably needn't be too much of a concern to them - long exposures do generate more heat (and hot pixels), but the camera would probably cut out to protect itself from damage (which is I suppose another potential reason for the live view cutting off, actually).