This Blog is about solar viewing and imaging.
DISCLAIMER : NOTE! Viewing the sun can be extremely dangerous! The information provided here is meant only as a description of what one or two people have done. The reader accepts all responsibility and liability associated with the use of any information provided here, as it is possible that important precautionary information may be left out. Neither Bill nor Mike is responsible for damage resulting from using the information and ideas herein!
I have had the opportunity to try the Quark in 4 different scopes so far , an Orion ST 80 F/5 ACRO , A SkyWatcher 100mm F/9 APO and these images were taken with a Williams Optics 110mm F/5.9 Semi APO Megrez All images are DMK 31.
First up AR 2061 & 2066 activity
A prom shot first at fill focal length
And again with 0.5 reducer mounted to the camera
This one was taken with the Quark in my Celestron 103 F/10 ACRO at 4200mm F/L
I wanted to wait until I had had some time with the new Quark before I posted any thoughts . The one I purchased is the chromosphere model and I have used it two times now . This filter has a 4.2 telecentric barlow so I figured using this with my long tube refractors could be iffy . The solution was an Orion Short tube 80 . At 400mm F/L the Quark bumps this up to 1680mm . My Moonlight focuser's are easily adapted to other scopes so I mounted one of them to the new solar weapon .. This is the configuration I used for the first images
I use my scopes more for imaging than I do for viewing but what I saw through the eyepiece was impressive , the field is quite narrow compared to my SM 60 but the details were every bit as good . where it exceeds the SM 60 is in the even lighting and absence of any sweet spot .
So far I have found this to be quite an imaging friendly filter . On scopes up to 80mm nothing else is required , just drop it into the diagonal and you are good to go . I tried using it with and without a 0.5 focal reducer on the camera and had no issues bringing the scope to focus . With the 4.2 built in barlow this does not cover too much area and gets you in pretty close so I wanted to see if a reducer would work for a more backed out view . Here are 2 images with the 0.5 F/R mounted to my DMK 21
AR 2058 , 2060 with AR 2061 just off the limb
Where all the action is , AR 2055 & friends
Now a shot of AR 2055 without the reducer
Even though this is not the prominence model it doesn't do a bad job
For comparison I took many of the same shots using my SkyWatcher / PST mod . There a couple of things to consider here , one is that I have had more experience imaging with this combination and two is that the SkyWatcher offers has a 100mm aperture with more than twice the focal length . here are the comparison shots
I wanted to try the Quark in my SkyWatcher and removed the blocking filter and 2" to 1 1/4" adaptor and put the 2" diagonal and Quark in it's place so this image is my SkyWatcher / PST mod double stacked with the Quark at a whopping 3780mm focal length !! I am surprised it turned out as good as it did .
Note ; All images were done with a DMK 21
May 16 update
I had another go with the Quark on May 13 . This time I removed the mod from my SkyWatcher 100 F/9 and used this scope with my DMK 31 for these images . Using this scope with the Quark and it's built in 4.2 barlow lenses brings the focal length up to 3780mm and was pushing the scope to it's limits . These being test shots I did not worry about identifying them .
My 2" Eyepiece Adapter
Daystar recommends using longer focal length eyepieces with the Quark . I have a couple of long F/L eyepieces but they are in a 2" format . I have always wanted to view the sun through a 2" eyepiece so I made a simple adapter so I could mount a 2" SCT visual back to my Quark and allow me to try 2" ep's with it .
Antares 2" visual back with the adapter
Assembled 2" adapter
2" Adapter installed in place of the original 1 1/4" one