250 mm F/20 Toro Kutter telescope by Rik ter Horst

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06-Dec-2012

250 mm F/20 Toro Kutter telescope

Sketch of my 250 mm F/20 Toro Kutter telescope as built around 1998, which makes use of a torical secondary instead of a weak corrector lens to eliminate astigmatism and coma

LG Electronics LG-P990
1/50s f/2.8 at 4.5mm iso100 hide exif

Full EXIF Info
Date/Time	06-Dec-2012 12:02:34
Make	LG
Model	LG-P990
Flash Used	No
Focal Length	4.5 mm
Exposure Time	1/50 sec
Aperture	f/2.8
ISO Equivalent	100
Exposure Bias	0.00
White Balance	0
Metering Mode	center weighted (2)
JPEG Quality
Exposure Program	0
Focus Distance	0.000 m

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