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Been using 6” , 8” , 10” and 12” Newts for years
Built my own Carbon 8” and 10” back in early 2022 using a Klaus Helmerich blank Carbon tube and GSO parts.
By the way mine are all f5’s
8” cost me around $1250 and the 10” cost me around $1500 nearly 3 years ago
I’d never touch an f4 as too many folk have had issues with entry level f4’s. In fact there’s a current post about this very issue. If I was ever going f4 it would be high end premium commercial stuff.
The 8” sits on a SW EQ6-R pro mount ( guiding around 0.40 to 0.50 ) top mount a real workhorse
The 10” sits on a SW EQ8- R pro mount ( overkill ) guiding around 0.50 to 0.70 ) these mounts have inherent backlash and hard to tune out.
Imaging cameras ZWO2600MC ( not used much these days )
Use mainly my ZWO2600MM with Antlia LRGB pro and Antlia Ha Oiii and Sii 3nm filters
The benefits of f4 compared to f5 are minimal ( the camera does all the work )
Image scales are 0.77 arcsec per pixel for the 8” and 0.62 arcsec per pixel for the 10” so oversampling gives me plenty of flexibility in processing
My subs in Sydney under B8 skies are generally 20 to 30 sec for Broadband and 120 sec to 180 sec for Narrowband
Down at my Dome subs for Broadband are 60 sec to 120 sec
Narrowband between 90 sec to 120 sec
My 8” Carbon newt images under B8 heavy LP in Sydney
My 10” Carbon newt images under dark B3 skies in my Dome on the south coast NSW.
Both hold collimation really well ( only check it once in a while but it’s normally fine every time I check )
My images are on Astrobin
Clear Skies
Martin
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