Quote:
Originally Posted by JA
That's a wonderful image Mat 
I'd love to know if it was shot wide open with the Nikkor or at what stop, if you could advise?
Best
JA |
Thanks JA! I use a 3D printed aperture mask on the front element which stops the lens down slightly to f/3. I found this helped tighten the stars a little and reduced some diffraction effects from lens clips. I am also using 5nm filters so being at f/3 should help negate any signal loss from band shift. As a result, I don’t think I am losing much imaging speed with the mask when using the narrowband filters. I probably should do a bit more testing to see if an even smaller mask would have the same effect.