Rob Tak EM200, TEC 140 And if the dam breaks open many years too soon, And if there is no room upon the hill And if your head explodes with dark forebodings too, I'll see you on the dark side of the moon.
CPC 9.25 TV 76, 102, NP 101 Unitron 114 Gibraltar mount Half Hitch Mk III SolarMax 90 .7A/B15 Coronado PST Eyepieces from the sublime to the ridiculous
Quote:HelloMy name is Ennio (from Italy). I apologize if I do not write correctly. I need help to choose to buy second hand TV102 or NP101. I read many reviews about these wonderful refractors. I think the NP101 is generally better because it is shorter and correct TV102, but I'm not sure that it is better to see the planets and double stars (sharp and clear) because the TV102 has only two lenses and a longer focal length of the NP101.Thanks.
Clear skies, Erik
Visual astronomer, main instruments:
Matthias Wirth 16" f/5 Takahashi FS-102 NSV on EM-10 Celestron 1983 C5
Zeiss, TeleVue and Celestron eyepieces
Nikon 18x70 IF-WP Zeiss Victory FL 7x42 Zeiss Victory FL 10x32
Quote:For la200 and Jon Isaacs that have NP101.I understand that some NP101, have different diffraction images. Rings in intra focal images are clear, but in the extra focal images rings can not be seen clearly.May depend on the optical design or is spherical aberration?
SLAP Observer --- TMB130SS, SV102V(LOMO Lens), SV80ED Deluxe "The only thing necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke. "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell "The measure of a man’s greatness is not determined by what he accomplishes for himself, but by what he accomplishes for others.” -- Some Bald Guy
“I am the only person to ever ace a 1951 USAF resolution test. My 'to observe' list says 'done'. I do not use charts or atlases when I starhop; men do not use maps. One of my sketches won an SBIG deep sky imaging contest. I am the life of star parties I have never attended. I never say anything looks like a faint fuzzy - not even a faint fuzzy. Pilots aim green laser pointers at me. Don Pensack proofreads my CN forum posts.” - The Most Interesting Astronomer in the Universe
17.5" Dob "Beta Version"
NP 127 on a CG-5 and CGEM DX
25x100 and assorted other binos
Naglers, Ethos and various others.
Quote:This is one of a star test NP101. As you can see the pictures intra / extra are very different.
Quote:Though he may not be a fan, Jim seems to be outvoted by the many favorable reviews and enthusiastic users of the NP101. Bill
Rob ... my avatar pic is me ... on a good day! ********************** SV-105T Canon 12x36 IS binos Pan 22 Nag 12T2 Delos 8 XCEL-LX 7mm Nag 5T6 Previous Scopes: .... many apos and a few dobs!
Quote:2) the 102 is shorter and lighter than a 101 with a Barlow.
Quote:...the big thing about the NP-101 is that it does it all, 15x to 300x with zero field curvature...
The Helderberg Observatory Altamont, NY