Re: Pssst...Wanna See Some Ronchi Pics?

Ed T wrote:
Here's a website with comparative Ronchi test photos for refractors. The main site is here:

http://homepage3.nifty.com/cz_telesco/

The refractor tests are here:

http://homepage3.nifty.com/cz_telesco/refracter_test.htm



Wow - that Zeiss as100 looks like a piece of junque, and the foucault pic on the APQ, what's with that diagonal scoring?

And that Pentax 12.5 f/6.4 ed! It looks terrible! I wonder what stars look like through it - zonal, poorly corrected, you can see the concentric circles from the mechanical grinding. Am I mistaken here? That lens looks like...well, crap.

The Intes has a pretty scary figure, too.

Lot of surprises. Who woulda guessed that an AP155 had dog biscuit?

What an interesting site. WHo did the testing?

Thanks for the look - Chris
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