About Me

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A retired Welshman living in wonderful Plymouth in SW England, I’m a family man, novice sailor and boat builder, astrophotographer and motorhomer. With a passion for all things to do with education and the sea and skies above, I have a sense of adventure and innate curiosity. I write three blogs. ‘Arwen’s Meanderings’ charts my learning to sail a self-built John Welsford designed ‘Navigator’ yawl. Look out for her accompanying YouTube channel www.YouTube.com/c/plymouthwelshboy . ‘UnderSouthWestSkies’ follows my learning journey as I take up astronomy and astrophotography; a blog for beginner’s new to these hobbies, just like me. ‘Wherenexthun’, a co-written blog with my wife Maggie, shares how we ‘newbies’ get to grips with owning ‘Bryony’ an ‘Autosleeper’s Broadway EB’ motorhome, and explores our adventures traveling the UK and other parts of Europe. Come participate in one or more of our blogs. Drop us a comment, pass on a tip, share a photo. I look forward to meeting you. Take care now and have fun. Steve (and Maggie)
Showing posts with label eqm-35-pro mount. Show all posts
Showing posts with label eqm-35-pro mount. Show all posts

Thursday, 1 May 2025

EQM-35-Pro mount update

 Go back a blog post or two and you will see that I have inherited the above mount, for free, from a very generous gentleman who was getting out of the hobby. You can read about my initial first efforts using it and the problems I encountered.


alt="Astrophotography rig on eqm=35-pro mount"

Three sessions on, I managed to get it all working last night. Guiding below 1.0. GOTO functioning spot on. Two minute images of M13 - thirty of them, just as a test case; along with calibration frames.  

alt="Screenshot of guiding data on asiair mini"

So, my initial mistakes. Guess who had both an ST-4 cable AND an EQMOD cable plugged in? Only need the one and I opted for the latter. 

Latitude and Longitude inputs in the ASIair slightly out and now corrected!  

Problems with guiding? Down to several factors - too low a gain setting. Wrong aggressiveness inputs in DEC and RA.  Had it on auto rather than either north or south (north proved better for me). 

Polar alignment went better last night. I polar aligned using the little illuminator and the reticle - without the equipment load on. Then after adding the load and counterweight, I did it using the ASIair mini and it was pretty accurate.  I managed to plate solve accurately on Vega and from that point onwards, it would slew to any target accurately and pretty much place it in the centre of my DSLR LED rear view screen. 

Simple things to put right - every night is a learning night if you are a beginner. Good job I'm a 'wing it life-long learner' type 😁

alt="Canon 800D and zenithstar 61ii with asiair mini and RVO guidescope on eqm-35-pro mount"

Now all that remains is cable management and also working out how to illuminate the reticule better. The polar illuminator is pathetic. And also how to look through the polarscope without cracking my neck, dislocating my shoulder or wrecking my knees! 

Updates:

In the post today arrived the skywatcher right angled polar scope viewer. Game changer! No more wrecked neck and knees. 

And here is my first ever image of M13 and the first one taken on this new to me mount. 

alt="Globular cluster M13"

Shooting data: Zenithstar 61ii with field flattener; Canon 800D. ASIair mini with ZWO 120mm mini guide cam on a RVO 32mm guide scope. Power was a Celestron Lithium Pro PowerTank. 30 x 120" at ISO 800 on a moonless night with 12 each of flat, bias and dark calibration frames. 
Not a bad first! I messed up the core but lesson learned - shorter light exposure times and more of them for stacking. Software used - SIRIL, GraXpert and Affinity Photo.