|
I can now answer raymo's question about finer slits: Yesterday I made a 55mm one with 0.9mm slits for my 135, f/2.8 lens and a 58mm one requested by a well known Victorian astro imager, also with 0.9 slits. Tomorrow night I hope to test mine on the sky.
cheers,
Stefan
Last edited by Stefan Buda; 17-05-2015 at 10:48 AM.
|