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.
Because of the > 3x focal lenght extention of the FFC, you will most likely see just some rest of coma at the edges of the field. But if you place an coma corrector and an FFC in a row, the image quality will degrade in the whole field. Therefore its better to use only the FFC without coma corrector
Answer by: Baader Web Team (Admin) on Nov 18, 2019 3:28:00 PM
The Baader BCF is more open in the red part of the spectrum, means all other colours pass the filter plus some more red. This gives "normal" (daylight) photos a pink touch that you can correct in image processing
Answer by: Baader Web Team (Admin) on Nov 18, 2019 8:48:00 AM
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.
During Christmas time 2019 our offices are short-staffed from December 23rd until January 6th, 2020. Emails and phone calls on our answering machine will not be checked regularly and there may be slight delays in processing of orders and enquiries during this time. We ask for your kind understanding and wish you a merry Christmas and a happy new year 2020 with many clear skies!