SCOPES: CPC1100; AT66ED; EdgeHD 8";SVR90T RAPTOR
MOUNTS: CGEM; Vixen GP2; iOptron Sky Tracker; Celestron AVX
CAMERAS: Canon 60D;Lodestar
EYEPIECES:TV N31T5;Delos14;Delos8;Pan27; PL20;PL25;PL32;TMB9
The Lord sits enthroned above the circle of the earth...He stretched out the heavens like a canopy.
Quote: 2/ do they know these actual specs.
Quote:As a consumer of these some of these products one feels slightly disappointed with the companies who sell them. They sell these products with the specifications as claimed by them. There are some reasonable large discrepancies.
Quote:This measures are really impressives.I would like to add some questions to the topic, about "why" this is happening to some production lines:1) Bad engennering?2) Quality control failure?3) Intentional diaphragm of the optics to hide some distortions?4) Reduce price when using internal components below the needed specs?5) Other?
Quote: I assume that the Garrett Signature series has the same aperture mismeasurement problems.
Quote:I assume that the Garrett Signature series has the same aperture mismeasurement problems. Also-is there reason to assume that the higher end big binoculars and/or binoviewers are rated correctly? JS
Quote:Well FWIW, I also checked both a Fujinon 16x70 and the Oberwerk Ultra 15x70. Both checked out to readings of 69mm and 70mm aperture. Based on the previous, my measures are good to within 1mm.edz
Binoculars: Miyauchi Saturn III - 33/39/50/71/150x100, WO 22x70ED, Fujinon 16x70 FMT-SX Pentax 10x50 PCF-V, 10x43 DCF-SP, 6.5x21 Papilio
Nikon 10x35 EII, 7x35 E, 8x30 EII, 8x23CF AS Diplomat
B&L 7x26 Custom
Scopes: C9.25, TMB130SS/FT, SV80S-LOMO 80/480
Quote: Orion too, for a while) advertised it as 15x63,
The night sky is the canvas....
My optics are the brush....
The Milky Way is the masterpiece
reductio ad absurdum of epistomology is solipsism....
Quote: How much of this is due to deliberate vignetting of the light cone from the objectives and how much is from undersized prisms?
Quote: Quote: How much of this is due to deliberate vignetting of the light cone from the objectives and how much is from undersized prisms? I describe that in detail up above.edz
Quote:I was about to purchase a pair of 25x100s or 28s. But this has stopped me for the moment.For those of us who are beginning in this hobby, what are the rea$onable alternatives? Or are there none, really? I assume that the Garrett Signature series has the same aperture mismeasurement problems. Also-is there reason to assume that the higher end big binoculars and/or binoviewers are rated correctly? Of course, one solution is to simply live with the knowledge of what the specs actually are, bite the bullet and move on... Thanks-JS
Quote:Not knowing any better might be a blessing.
Quote:Quote:Not knowing any better might be a blessing. Yeah I suspect this may be one of those times where "ignorance is bliss" for the folks that own these. Nevertheless, I have been hanging out here long enough to expect to see a flood of giants showing up on Astromart or the S&S forum. clear skies,Rick
Quote:I won't be selling mine. Not yet anyway.edz
Quote: now there's an endorsement
Quote:In the GO 20x80 the back end of the objective tube wall inside diameter is not open enough all the way around to allow all the objective light thru to the prism. On some sides it intrudes into the light cone and cuts off the aperture. But then where the light does pass the tube wall, then it hits the prism aperture. So we have tube wall interference and prism aperture that is too small for the location of the prisms in the light cone.
Tim -- Colorado
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"Me? Crazy? Oh, yeah. Crazy like an ox!"