CaK Full Disk 16th April

I was exploring a bit with some of the spacings of the different optical elements of my homebrew CaK filter on wednesday with some positive results; increasing the spacing has the effect of throwing the ghost images more out of focus which makes them less noticeable in the original image.  I hope to be able to try and take this idea a bit further over the coming days as believe this idea has got a bit of potential.  Despite the poor seeing conditions associated with living in the urban heat island that is the West Midlands, the little 40mm scope running at f20 had no problem with the boiling atmosphere and delivered a cracking result showing what our star looks like at 393nm wavelength in the ultra violet.