martes, agosto 30, 2011

Four eyepieces for the collection

I have recently bought four new eyepieces:

University Optics Konïg MK-70 25mm, 70º:


Vixen LV 30mm 60º

Astro-Tech Titan Type II ED 40mm 68º:



University Optics Konïg MK-70 25mm, 70º:

Stats:
Type: Misc Wide Angle / Multi Coated
Focal: 25mm
Barrel size: 2"
aFOV: 70º
Field Stop: 29mm
Eye Lens: 24.5mm
Eye relief: 20mm
Elements: 7
ExitPupilsf5=5,f7=3.6mm,f10=2.5 

I tested it last night. I think thast it is the most versatile of all my eyepieces.

Astro-Tech Titan Type II ED 40mm 68º:



Stats:
Type: 
Focal: 40mm
Barrel size: 2"
aFOV: 68º
Field Stop: 29mm
Eye Lens: 32mm
Eye relief: 14mm
Elements: 6



This is a 40mm 2" Wide Field with 68º AFOV. It's clear that it could not be as a 100º AFOV, but I guess it is enough for a 40mm.



Vixen LV 30mm 60º:


Stats:
Type: 
Focal: 30mm
Barrel size: 2"
aFOV: 60º
Field Stop: 31,4mm
Eye Lens: ?
Eye relief: 20mm
Elements: 7



As well as the Astro-tech, a 60º AFOV for an 30mm should be enough, at least for my (almost) 37 years old eyes :)


Televue Radian 14mm 60º:


Stats:
Type: Radian
Focal: 14mm
Barrel size: 1,25"
aFOV: 60º
Field Stop: 14,4mm
Eye Lens: ?
Eye relief: 20mm
Elements: 6

To be tested......






Keep in mind that all of them will be used (for the moment) with a LX90 8", with a focal length of 2003mm and f/10.