I bought two of these for solar eclipse / transit watching with my children and have seen the transit of mercury from a professional observatory in Georgia (Europe). When the oil ran out in the generators, the telescopes were closed down and I got the only transit picture from the national observatory of Abastumani! In Turkey, I was invited to view a £6000 hydrogen alpha telescope as the eclipse started - look! There are four sunspots!! No I said, looking at my £40 cardboard telescope, there are 6 sunspots - there were indeed - sometimes simplicity in the optical pathway leads to clearer images. Every year for over a decade I instructed my Science and Society class in the Kilkenny Baha'i Summer School to observe the sun with their own eyes - through this marvelous little wonder that is a small but very accurate lens / mirror and a projection telescope that folds to a pizza box. Its traveled the world and just captured a Mercury Transit 11/11/19. Brilliant.
Even if it mechanically is possible, it will have one big disadvantage: T-2 has 42mm aperture, 2" Is 50mm. Means, you step down the aperture of the prism so that you will experience a vignetted field when viewing with long focal length eyepieces
Answer by: Baader Web Team (Admin) on Apr 8, 2021 9:18:00 AM
I have an ETX-125 (Mak) with a Wegat back. The output port is technically an SCT thread 2-24 (2’’ diameter, UNF 24 thread).
I also own a Diamond Steelrack SC which has a 2’’ 1.0 (metric) thread.
The threads are incompatible despite both being called SCT.
Do you sell an adapter from thread UNF24 to 1.0 ? otherwise what are my options ?
The ETX 125 is a MAK (Maksutov Cassegrain) and not an SC (Schmidt Cassegrain). These are different optical and mechanical system. Therefore both have different threads on the rear end - and most accessories that are especially designed for SC do not fit to MAK telescopes. This is the case for our SteelStrack Focusers. The MAK has not enough focus travel in the focusing mechanism to move the focus far enough out to get a sharp image when the SteelTrack is attached. Therefore we do not offer adaptors for attaching the focuser to the MAK - it simply makes no sense, the combination will not work. Unfortunately we do not know about another focuser that works on an ETX MAK
Answer by: Baader Web Team (Admin) on Apr 7, 2021 2:24:00 PM
If this is attached to the T-2 1C prism diagonal, will the nosepiece of a 1.25" eyepiece touch the prism surface? I'm concerned because the measured nosepiece length is 26mm, while the stated length of this clamp is only 20mm.
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