14" f/4.5 dob. 6" f/8 dob.
--------------------Clear Skies, PJ Refl.- 203/1420; Refr.- 110/616, 75/500; Bino.- 15X60, 10X50, 8X30 __________________________________________________
“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
Quote:With the Pentax SMC orthos, you always have to be careful that there is no dust specks between the lenses. They had a reputation for these and I purchased two that had them....very annoying. That fact may shy some buyers away.
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674If it ain't broke, fix it 'til it is.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:The XO 5.1mm and 2.5mm are about the same price as some of these SMC Orthos. I hear the XO's are better performers. Personally, I can vouch for the XO's, but have never used the SMC Orthos.Mike
Jeff Morgan - Wile E. Coyote School of Telescope Making
Rodger EON 80 Tak TSA-102 EON 120 Orion Apex 127mm Meade AR6 Tak FS-152 Celestron Nexstar 6SE and 8SE Celestron 9.25" SCT Meade 10" LX50 Celestron 11" SCT Celestron 14" SCT 16" Teeter/Zambuto 20" f/5 Obsession Classic Zeiss Conquest HD 10X42 Astro Physics Premium 15X70 Oberwork 20X80 Deluxe III Oberwork BT 100-45 Complete set of Baader Genuine Orthos Zeiss Diascope eyepiece 12mm, 68AFOV, Great eye relief (sharpest, highest contrast eyepiece I own, just awesome) etc., etc.
Quote:Some observers prefer the XO to the Pentax Ortho. Some prefer the Pentax Ortho to the XO. Some say the XO is at the level of the ZAO. Some even prefer the XO to the ZAO!
Quote:Interesting. I never knew what SMC stood for.
Quote:I've owned a set of ZAO's, several Pentax SMC's and the 5mm XO. I still have the XO. Personally, I feel it's the best 5mm of those I've used.
Quote: As a further note: the 5mm XO was advertised to have "smc full-surface multi-layer lens coating". So I guess it's a Pentax SMC too.
Quote:Yep, premium glass prices have been on a crazy tear in the past 5 years. Other than the Nagler zoom, everything here seems to have appreciated 50% in the 3 years since I started my long-term planetary optics comparo (making it bloody expensive to complete some of the sets!).
At this rate, this little set will be worth $1.2 million when I retire in 30 years. Sweet (insanity).
Quote:Some observers prefer the XO to the Pentax Ortho. Some prefer the Pentax Ortho to the XO. Some say the XO is at the level of the ZAO. Some even prefer the XO to the ZAO! Mike
Quote:I prefer the XOs to the ZAO IIs in the 4 and 6mm range. The ZAO II 10 and 16 are wonderful though. I have yet to figure out why one needs any of this stuff with the XWs sitting there in the same box. The recreational value consists mostly, methinks, in being able to enter a discussion such as this. GN
Quote:I had read that the ZAO-II 4 was the weakest of the series.
Quote:I think I'll pass on the 10 and 16, also. Too long a focal length in my primary scopes for planet/lunar unless I Barlow, and then what's the point of simple glass?
Quote:Quote:I think I'll pass on the 10 and 16, also. Too long a focal length in my primary scopes for planet/lunar unless I Barlow, and then what's the point of simple glass?True, but a barlowed ZAO has 6 elements in 3 groups, six air-glass surfaces. The XO's unbarlowed have 5 or 6 elements depending on fl, 3 groups, and six air-glass surfaces as well.
Quote:I prefer the XOs to the ZAO IIs in the 4 and 6mm range.