more mask testing

More testing. Used a Christmas ornament for my false star and reflected a single white LED off it. This creates more of a pin-point source. And it dimmed the light.

I had a more difficult time seeing the diffraction patterns in this case. I didn't even try the Bahtinov Grabber (BG) application. I just assumed it would not have enough data to work with.

Do the "arms" or supports in the Y need to be thicker? These wires are probably about 0.5mm. Or less. Maybe I should go a bit thicker...

Now, admittedly, I did not have the camera mounted in a steady fashion. So the movement in the image, especially at 200%, on the Live View was a little distracting.

I also learned an important lesson in this test. Removing the mask, which was taped to the lens hood, caused the focus to change. That probably means I'll need to not affix the mask to the lens. Perhaps I'd have to employ an early idea, to suspended it in front. Tonight, I wondered what would happen if it was windy.

Or maybe build a loose fitting cylinder. Not so loose that the centre of the mask is out of alignment... I didn't necessarily need to use a full cylinder. Perhaps a half tube. Half pipe! Just so it sits on the lens, nicely centred, and can be gently lifted off. Yep. That's it. Half cylinder...

So, for the next test, I'll add a half-cylinder or an over-sized full cylinder support, stabilise the camera, and try the BG software regardless.