OPFA-3 for Celestron 2" SC-Thread #2458143 can be attached directly onto the 2" SC-thread on the back of all Celestron Schmidt-Cassegrains.
OPFA-2 for 2" eyepiece clamps #2458142 fit's into all 2" eyepiece clamps and is the probably the most versatile option.
OPFA-1 for 1 ¼" eyepiece clamps #2458141 fits into 1.25" eyepiece clamps.
If possible, we'd recommend OPFA-2 (easier handling, sturdier than a 1.25" eyepiece clamp) or OPFA-3 (the sturdiest version, holds even heavy cameras safe, but has to be screwed onto the telescope). OPFA-1 and OPFA-2 should only be used with good eyepiece clamps which have a sturdy clamping ring instead of only one simple clamping screw pressing onto the eyepiece/OPFA.
Answer by: Baader Web Team (Admin) on Aug 15, 2022 1:20:00 PM
The 2", 24 turns-per-inch thread does not appear to be a standard thread in any of the UNF, UNC or Whitworth lists. All threads have dimensional tolerances (permitted dimensional deviations). The standards, such as ISO 965 for metric threads or ASME/ANSI B1.1 for Unified National threads, specify these. How are the permitted dimensional deviations defined for this product please? My reason for asking is that I want to be very sure that £2000 worth of camera equipment held in place by this product will not fall off. The consequences could be serious.
We do cut this thread according to the Celestron directives which are not to be published. We are authorized Celestron Distributor since 45 years and please be restassured that we know how to cut that 2" thread - as long as it will be fitted onto a Celestron-OTA.
Answer by: Baader Web Team (Admin) on Aug 12, 2022 12:44:00 PM
That’s great, thank you. My adaptor arrived this morning and I have attached it to the telescope. It works just fine, does not “jiggle” or “wiggle” and I applied as much force as I dared to try to pull it off. It didn’t even almost pull off.
I am pleased to hear that you and Celestron have shared a detailed specification. I don’t need to know what’s in it. The fact that there is one is enough to reassure me.
Thank you very much.
Answer by: Dr. Jane Clark on Aug 16, 2022 9:39:00 AM
Hello, I'm looking for a taller focus travel. I have a LX200 12' and I'm asking myself if 30mm focus travel will be enough. In fact, I've seen the RT version and I'm asking myself if the RT focuser won't fit onto my LX200.
I have an other question, which adapter do you recommend to be used between my LX and that focuser ?
Please check the dimensions before to avoid a possible collition. The inner Tube of the RT Model has a diameter of 63mm, please see: https://www.baader-planetarium.com/en/downloads/dl/file/id/28/product/2858/bds_rt_dimensions_technical_drawing.pdf
Usually you mount the SC modell and focus with the original focus knob to a range that you can focus all your accessories furthermore with the Diamond Steeltrack SC. Please hold in mind that Meade sometimes uses sligtly different tolerances for the thread, We had some trouble with it in
the past. Which adapter you need for your telescope depends the thread you have. For the Steel Tracks you can find all dimensions under the Link
Answer by: Baader Web Team (Admin) on Aug 11, 2022 10:11:00 AM
I'm traying to search for a flattener, reducer to use with my Meade ACF 12" and give me the best result with an APSC sensor (3,76µ/px). I can see that the Alan Gee Telecompressor has been not developed to support airy disc sizes less that 8 micron.
Then my question is ¿wich is the best reducer to adapt to this combination ACF + APSC (3,76µ/px)?
We are very sorry in this case we cannot give a recommendation because our reducers are designed for SC telescopes. We never tried them with ACF telescopes. Please ask the manufacturer of your telescope which reducer works best.
Answer by: Baader Web Team (Admin) on Aug 8, 2022 12:40:00 PM
Our company exists now for more than 50 years. In this time, more than 15.000 Baader Planetariums (the first patented product of our company) help all over the world to give students an understanding of astronomical correlations. In our own manufactory, more than 500 observatory domes have been produced and delivered turnkey-ready. Instruments and telescope accessories from "Baader" are known for their high qualities by many astronomers and universities. We consider it our duty and obligation, not only to sell telescopes, but an indivdually selected telescope system, that brings you a lifetime of joy.