T3i 600D Mirror lock-up not working with BYE 3.1.13

[rtemen]

I need to take many very fast exposures.

It is suggested that the problem I am having with my flats is that there might be mirror mechanism shaking or timing.

It suggested that I set a mirror lock-up for a second or two before the shot to see if that settles the problem down.

Here is what is happening with my process:

1. I enable mirror lock-up on my camera
2. I set the mirror lock-up to one second
3. I hit Start Capture
4. In 30 to 45 seconds the mirror goes up
5. In another 30 to 45 seconds, it sounds like the camera takes the shot
6. In 59 seconds, I get an error message that the download has timed out
7. At this point the progress clock at the top right keeps spinning and BYE is locked up and I have to kill it because after many minutes it will not respond
8. I even try Aborting, and nothing will wake it up.

Any suggestions?

Rich

 

[astroman133]

Given the appearance of the flat frame that was taken when the secondary mirror was in place, I am going to guess that the problem with flats taken when the Hyperstar lens is in place is that the severe vignetting is being caused by the dew shield. It should be relatively simple to remove the dew shield and hold the light panel behind the camera while taking a flat. This assumes that the light panel is large enough to illuminate the full FOV.

[rtemen]

Hi, Rick. It has been a while.

I just now found this entry.  My dew shield is flat black inside and out. 
Would you still think this could be an issue?

[astroman133]

I don't think that the vignetting is due to reflection off the inside of the dew shield. It is that the field-of-view of the Hyperstar is larger than the diameter of the dew shield. If there is a significant distance from the back of the camera to the flat panel, your least expensive option could be to shorten the dew shield to bring the flat panel closer to the back of the camera. However, if this doesn't provide a solution you may have to buy a new dew shield. So it may be worthwhile to find a way to avoid using the dew shield  to hold the flat panel in place as an alternative.

[rtemen]

Hi, Rick.

I put another flat in the Google Drive. It Starts with Feb_21.
Let me know if you can see this one.
Rather than my light panel and dew shield, I pointed it at my photo studio's white screen.

See if you can tell anything different.

[astroman133]

It still seems as though there is too much darkening around the four sides of the image.