My first CaK image

[krakatoa1883]

Having used a Quark calcium for two years I eventually decided to try some CaK imaging. From the European Lunt dealer I found a good offer for a straight-through B600, which I preferred to the diagonal version as it has a shorter optical path (I have also a H-alpha BF1200 ST and indeed it is more versatile for imaging).

Although this CaK unit is the smallest of the series I have been able to get a full disc by using of my 150mm f/5 refractor (750mm F.L.) with aperture reduced to 75mm. However for FD imaging I prefer to use of a Skywatcher 72ED (420mm F.L.). I tried to capture some prominences but I am still not satisfied, have to find the best processing procedure yet. These are my first CaK images, comments and suggestions would be much welcomed. All images with N up and W right.

2019-07-14-1500-RB-CaK-fulldisc.jpg (86.31 KiB) Viewed 1154 times

2019-07-13-1429-RB-CaK-proms.jpg (25.84 KiB) Viewed 1154 times

2019-07-13-0628-RB-CaK-prominence.jpg (14.89 KiB) Viewed 1154 times

[marktownley]

This is excellent Raf!

[Carbon60]

A very nice FD, Raf. Beautifully even illumination across the disk.

Stu.

[banjo]

Excellent!!
Paul

[MAURITS]

Excellent Raf.

[krakatoa1883]

Thanks to all, this CaK device is indeed definitively more funny than my calcium Quark

I noted that the filter is recommended up to 100mm aperture, I suppose an ERF is required for larger refractors but the 2" tube end has no thread for my blue CCD filter, is there any way to make an adaptation ?

[Montana]

Wow!! you managed to get some lovely proms and that is a difficult challenge, great shots

Alexandra

[krakatoa1883]

Thanks Alexandra, very kind

[highfnum]

excellent first