Since my name made their "invitation to join" list my spam receipts in my email have increased considerably. Some in German, which I neither read or speak....
Yes, I have noticed more junk stuff now that you mention it. I do not use spam filters, just delete subject line emails you know you don't want to open. tony ...
My invitation came recently from a fellow on another Yahoo group. I've never communicated with him before, and haven't posted on that group for probably 3-4...
I figure that just from a common sense standpoint, and their own security, people would understand that providing a third party with passwords is a no-no. If...
Does it matter where in the rear of the optical train the dioptrx goes? What about putting it on the front of the diagonal or the bottom of the eyepiece? I am...
... Would anyone care to explain the results of the testing, for those of us who neither read German nor really understand what all the pretty pictures mean?...
... PV 1/6.2 wave RMS 1/41.5 Strehl 0.977 Means extremely fine performer but not exceptional. I like to see tests on AP and TEC refractors performed by the...
"extremely fine performer but not exceptional"? That sounds almost contradictory. What is the bottom line for a visual observer? Can one expect a spectacular...
... The best place is on the eye lens of the eyepiece. The astigmatism you are trying to correct is in your eye, so you want the correction lens near the eye....
... Bill, Yes - I would say the views would be quite nice, bordering on spectacular if the lens had cooled and the seeing was decent. I do not think you'd be...
... telescope available off the shelf and its this good. > Paul ... But what does "mass produced" mean in this context? My impression is that Takahashi sells...
... Available "off the shelf" or nearly so. TAK does not manufacture these in the classical sense like AP or TEC. The lenses are made in a factory to some...
Thanks. Someone wrote off list to confirm the same point. This is unfortunate, because it would be nice to make a dioptrx adapter that screwed in at the...
... I should have used different wording here, "extremely fine performer but not perfect". The tested TAO has a Strehl of .977 which means 2.3% of incoming...
... I agreed with Vahe. I tested between TEC140 and TOA 130F side by side shootout with Mars since of this year. I found like Yuri said, it will different when...
... Unless you used a 130mm aperture stop on the TEC, the TEC140 clearly had an edge due to its larger aperture. Your observation that it was "more clear,...
... I agree with this. Aperture surely contributed to the differences between the telescopes unless a mask was used. Moreover, I think it would be quite...
Paul Leuba , in part ... Paul, I think Vahe nailed it when he wrote... "You can probably see the difference between the two only in a side by side shootout on...
Noticeable yes - dramatic, absolutely not. In terms of resolution both .977 and .99 will give you the maximum possible from a given aperture, where the .99...
... As far as is practical I suspect few could see a difference visually. At this point individual bias (or expectations if that sounds more palatable) would...
Greg; There wqas a company, run by a dispensing optician amateur astronomer, that used to do astigmatism correctors designed to screw onto the nosepiece of...
http://celestialwonders.com/galaxies/NGC7331_20081002_LUM.jpg This is 5.5 hrs, fl 2800mm (.66 arc seconds per pixel, according to Frank Barrett, who took it,...
I have a Pentax 6mm eyepiece #70203 which has been on the shelf for 20 years. It has an illuminated reticle and internal battery compartment. The eyepiece is...
Guys This is nitpicking in my view. I would happy to own either scope with 0.97 or 0.99 Strehl. The tolerances between scopes of the same manufacturer are...
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