So, I've built a barn door tracker:
and I was astonished that pictures just got better:
That's Alcor and Mizar, and in the top right part, the fuzzy thing is the Pinwheel Galaxy (M101). It's a single exposure (30 s, +1.5 EV --> ISO 6400), shot with my Sony Alpha 6000 and a Varexon 135 mm f=2.8 lens.
Though I'm now able to reduce motion blur, the pictures still look... interesting. I made the pictures on a parking lot though, with some street lamps some 150 ft away.
And here are three exposures stacked (same 30 s, same ISO 6400), with a very interesting motion blur.
Are there any suggestions for my next steps? Is there a way to further improve the sharpness of the images? (I guess I have to weigh down the tripod a bit more, even when I'm careful not to shake the contraption.)
My other lenses are:
- Speedmaster 35 mm f=0.95 (truly great but gets blurry at the edges at wide apertures)
- Minolta 50 mm f=1.7
- Osawa MC 28 mm f=2.8
- a 500 mirror lens, f=8 (talk about dark images...)