"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
Clear skies, Erik
Visual astronomer since 1978.
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
--------------------Clear Skies, PJ Refl.- 203/1420; Refr.- 110/616, 75/500; Bino.- 15X60, 10X50, 8X30 __________________________________________________
Quote:They're marked 10x/22 B (B for brillenträger, eyeglass user).
Very nice report and congratulations on the Zeiss eyepiece find! I've been using Zeiss aspheric orthos for solar viewing for several years now and they yield a very fine image, with excellent contrast. I purchased them through APM, but they are in the Zeiss microscope housings. Here is a pic:
"Life is too short to miss the beauty of heavens."
Quote:I already played with the idea to use these 3-element eyepieces for binoviewed planetary observations in my 6" f/7.33 APO refractor, along with Baader's FFC or the A-P BARCON.
I checked on CN some older threads on the 3-element Zeiss microscope eyepieces and their use in astronomical telescopes. All reviewers reported that these 3-element microscope eyepieces are indeed very sharp on-axis, but complained a quite noticeable pin-cushion distortion at the very edge. What is your observation on this matter?
Quote: So if yours have diopters... are you sure it's only 3 elements?
Quote:You haven't actually said "3 elements" but Scott99 and Stephan refer to 3 elements. I know there is a 3 element version but I would imagine it doesn't have a diopter.
Quote: Quote: So if yours have diopters... are you sure it's only 3 elements? I don't know how many elements they have. Have I said something about that? I can't remember! That's not to say that I haven't! All I know is that they perform as if there wasn't anything in there at all, except a magical window into space itself. Clear skies!Thomas, Denmark
Quote: I thought the APM ones were the same optics regardless of whether they focus or not, but there's no way to confirm it for these old ones. Some of them might be a different design.
Takahashi FS128, TSA 102, FSQ106N, Losmandy GM-8, Baader Mark V, Leica ASPH, Takahashi, Ethos and Panoptic eyepieces.
Quote: someone used a small green laser shined into the eyepiece to reveal the different lenses.
Quote:It appears to be the same as these Zeiss eps, marketed as 27mm eps by BW Optik:
Zeiss advertisement from BW Optik
Quote: It appears to be the same as these Zeiss eps, marketed as 27mm eps by BW Optik:
Quote: OK, Thomas perhaps they are fine polish but are they also multicoated for astro observing?
Quote: Aren't you glad you decided to buy these
While the same, they are definitely not 27mm, but 25mm, as they should be, if they are 10x microscope eyepieces...
Only on close scrutiny did the Zeiss show a slightly sharper, cleaner image. It was subtle, but it was real. The full effect only shows up when you binoview with them.