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Contains:  Ring nebula in Lyra, M 57, NGC 6720, IC 1296
Getting plate-solving status, please wait...
M57 FF View, 


M57 FF View

M57 FF View

Technical card

Imaging telescope or lens:C11

Imaging camera:Nikon DAW Modified D750


Guiding telescope or lens:C11

Guiding camera:Lacerta MGEN VEr2 Lacerta

Focal reducer:Starizona SCT Corrector LF

Software:DeepSky Stacker 3.3.4Photoshop CS 3 Photoshop CS3

Filter:Optolong L-Pro 2" Nikon T-Ring

Accessories:TS Optics M68 OAGLacerta Mgen V2 Autoguider

Resolution: 5179x3276

Dates:July 4, 2017

Frames:Optolong L-Pro 2" Nikon T-Ring: 21x120" ISO400

Integration: 0.7 hours

Darks: ~35

Flats: ~20

Bias: ~270

Avg. Moon age: 10.56 days

Avg. Moon phase: 81.28%

Bortle Dark-Sky Scale: 7.00

Mean SQM: 18.50

Temperature: 16.00 job: 1642917

RA center: 283.422 degrees

DEC center: 33.161 degrees

Pixel scale: 0.585 arcsec/pixel

Orientation: -27.162 degrees

Field radius: 0.498 degrees

Locations: Meldert @Home, Hoegaarden, Vlaams Brabant, Belgium

Data source: Backyard


Testing the C11 and the Starizona on the new EQ8, with a new TS M68 OAG. Need to tweak the OAG distance / focus and the Starizona distance. According to Starizona the Corrector/Sensor distance should be 134.5mm but currently @ 139,5mm also unsure on sensor 'squareness' to the focal axis.

C11 resulting focus = 2010mm @ F7,2

There was a 77% Moon almost hiding the famous galaxy

Full Frame View no cropping

Also 'first' of the L-Pro Nikon T-Ring with integrated LPS filter

I used ISO400 for a change, but I don't see much advantage in it, probably going to change back to ISO800 next time.

This image was scaled 75% (@ full resolution)



License: Attribution-NonCommercial-NoDerivs Creative Commons


  • M57 FF View, 


  • Final
    M57 FF View, 




A new test under a moon of 92% very severe gradient had to be removed Continued testing of the optical train and OAG ; border slightly cropped Several reflections visible no doubt from the Optolong LPS, not sure what is the source : Lyra star or M57 itself

Sky plot

Sky plot


M57 FF View,