Josef “Jeff” Sipek

2015 Lunar Eclipse

You may remember that there was a lunar eclipse back on September 27th, 2015. That evening, I set up our 90mm refractor telescope (1000mm focal length, f/11) in the driveway and spend a fair amount of time sitting on the ground. I used a t-mount adapter to mount my Nikon D70 instead of an eyepiece—effectively using the telescope as a big lens. (This is called prime focus photography.) Every minute, I took a shot of the moon hoping to make a collage. It took me nine months, but I finally remembered to do it.

(4 MB full size image—8750 by 1750 pixels)

To keep the overall image aspect ratio reasonable, I ended up using every sixth image. Therefore, each step is six minutes apart and the whole sequence spans about 42 minutes. Each of the photos was taken at ISO 1600, which the D70’s CCD does not handle very well, hence the noise.

I am looking forward to the next total lunar eclipse. It should be a whole lot easier to do with a modern camera like the D750. Sadly, it will be a while before there is another total lunar eclipse on the east coast of United States.


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