[bojan]

I wanted to take a series of images (10 minutes apart) of the next Moon eclipse, using intervalometer.. but unfortunately none of my 3 timers can be programmed to take bursts of 2 exposures (required to activate mirror lock-up), with delay of say 10 minutes between them. And MLU is a must...despite my EQ6 is very sturdy, and my Russian-built MTO is very heavy, images are blurred in vertical direction if mirror lock-up is not used.

Of course, I can program the timer to release shutter every 5 minutes, which will result in image taken every 10 minutes (first and every odd release will be "spend" to move the mirror up, the second (and every subsequent even release) will be used for taking image). I am guessing this modus operandi mat drain the battery before the eclipse is over....

The other solution is to modify one of the timers - I only need to add input connector (another 2.5mm stereo socket), so I can activate the sequence (2 exposures say couple of seconds apart) from another timer every 10 minutes.

This modification could be very useful for photometry of fast transients (exoplanets for example), when bursts of exposures could be stacked to increase SNR.

I will try to do the mod in the next couple of days.. will report how it went after eclipse.