I initially started all this with a Coronado 90III single stack. I live at 8000asl in Colorado and seemed to barely get on band with the SMIII, it definitely did not seem to pass through the doppler band . The CA was pretty unusable for visual observing or imaging.
Next decided that a Lunt Modular would be more to my liking. It took a few weeks but was happy and proud that Lunt would build and test a scope during this time in the covid. I figure I am lucky enough to be working, Hydroelectric communication and instrumentation is essential, so I would share the wealth.
I received the big box with the LS100mt, a second box is due to be delivered withing the next hour or so. I modified my home made LX80 dovetail to fit the Lunt. Mounted the scope and took a look. The pressure tuner was still tuned much of the way in. It only took a couple turns to get on band and another turn or so to pass through the Doppler band, 2 or 3 more turns to bottom out and all proms disappeared. Very good views for sure with the 27mm and the 21-7mm zoom. Next took off the solar single stack and feather touch focuser and put on the crayford and 45° terrestrial viewer. I was pointed at a camping area a mile or so away. The focus was perfectly on a Ruby Throated Humming bird about 25 yards out, absolutly stunning color and clarity. Racked the focus to a truck in the camping area and could make out the Colorado license plate and a man riding a bicycle wearing a mask. Daytime Moon was pretty good. Viewing was fair.
Connected the Sony A7RIV by flipping around a 1.25" eyepiece mount from a projection adapter and screwing a Sony E mount bayonet on. Focused through the Sony viewfinder. The attached photo of the scope shows the configuration. Vignetting prominently displayed in the snapshots from the moon and sun. Un-edited full res at 60 megapixel images on photobucket. I am working with some 16 image raw pixelshift shots but at 2 gig per set it is a bit time consuming working with them. That method may not work but thought I would give it a shot. I think I can get rid of the vignetting by making a 2" to Sony E-mount, the bottle neck should then be the 34mm blocking filter in the filter stack. I am very patently waiting, ahem, for the doublestack box to arrive via UPS. Out For Delivery seems to turn into Encountered a Natural Disaster frequently at this altitude in Colorado, lol.
So here are a few things on my short list.
1. POE Gige 5 port hub for BFLY-PGE-50A2C-CS (not the higher frame rate black/white I wanted but was priced right and terrestrial use)
2. Adapter for 2" to Sony E-Mount
3. 2" 34mm+ 2x and 3x or variable teleconverter (going to try the Sony GM 1.7 and 2.0 teleconverters I have in the camera bag)
4. 2" eyepieces, please suggest some good ones.
5. New mount to support the 30-40 pounds of scope and track day and night for DSO/planetary astrophotography
Edited by chemman, 01 July 2020 - 12:42 PM.