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M27 (APM 2,7x+LPS test)

Technical card

Imaging telescope or lens: TS Optics UNC 8" f/4

Imaging camera: Canon EOS 600D astrodon

Mount: ORION Atlas EQG

Guiding telescope or lens: Borg Mini 50mm

Guiding camera: QHY5L-II Mono

Focal reducer: APM 2,7X comacorr barlow

Software: PixInsight

Filter: Hutech IDAS 2" LPS D1

Resolution: 3066x2310

Dates: Aug. 21, 2015

Frames: 20x300"

Integration: 1.7 hours

Avg. Moon age: 5.73 days

Avg. Moon phase: 32.79%

Astrometry.net job: 758067

RA center: 299.903 degrees

DEC center: 22.710 degrees

Pixel scale: 0.408 arcsec/pixel

Orientation: 83.630 degrees

Field radius: 0.217 degrees

Locations: Pic de l'Huile, La Table, 73, France

Description

It was just a test of a mount of my 2,7x APM barlow on an extension ring as a support for my 2" IDAS LPS filter. Stars are not round at all, but the autoguiding was good. So, it demonstrates, I think, that my tilt problem is not solved, and has even been amplified by this mount! The direction of the aberration of the stars is the same of the apparent tilt distorsion on my wide field pictures. Now, I think that I know were to put some spacers!

Comments

Author

bzizou
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M27 (APM 2,7x+LPS test), bzizou