First test of the new CaK filter and first impressions are promising, exposure time is pretty much halved which is always a bonus, not sure if I have a faint reflection to deal with or it was haze / high cloud earlier. There appears to be no blurring of detail, although the image was taken in between shower clouds so seeing was far from ideal. Taken with the 60mm scope at f16 at both the filter and also the chip.