One of the reasons I chose the RASA was that, due to my personal circumstances, I don't go out for observation often. That's 8 nights of observation for a single object, which is unfeasible for me. That means, to get the same result I get in a single night with the RASA, I should need 8 times longer exposure time with my previous 72ED. Compared to the 72mm on the 72ED, it's a big difference.ĭoing the math, the RASA has a light gathering capacity almost 8 times higher than the 72ED. However, the RASA has an aperture of 204mm, which makes its focal ratio f2.0. The RASA 8 "has a focal length very similar to that of the 72ED, which allows me to continue photographing objects similar to those I have been capturing until now. In this case it is a Schmidt Cassegrain design telescope, but the camera is placed where the secondary mirror would go, at the front of the telescope. The Celestron RASA (Rowe-Ackermann Schmidt Astrograph) 8 "is a telescope from the group of so-called "astrographs" characterized by a great capacity for capturing light. However, I needed to update the telescope.Īfter examining various options and talking a lot with my colleagues, I decided that the best option for me was the 8-inch Celestron RASA. I already owned the rest of the equipment, as I had dedicated cameras for capture and guiding, guide scope, off-axis guider. In this article I will talk about this second configuration.Īfter I had been looking for some gear for a while, my colleague Raúl put his EQ6 Pro up for sale, so even though I was looking for a HEQ5, I eventually bought his mount and thus had a mount with a higher load capacity. The main equipment: I wanted the other equipment to be powerful regardless of size or weight (as long as the increase in size / weight was justified by an increase in equipment performance).The portable equipment: One of them would be a light equipment using the AZ-GTi and following the line of maximizing performance while minimizing the weight and volume of the equipment.I decided that I wanted to have two astrophotography equipments: Since I was unable to do astrophotography during confinement in 2020 and early 2021, I used that time to study different combinations of equipment. A graph of test results for your specific filter is included for your reference–a valuable service unique to Astrodon.NOTA: This article has been published in Issue 96 of Amateur Astrophotography Magazine Every filter is individually tested for light transmission.Maintains a more neutral color balance than other light pollution imaging filters, perfect for imaging colorful nebulae and galaxies.Provides over 90% transmission at critical wavelengths. Selectively removes unwanted light pollution while allowing more overall light transmission to pass through to the sensor.Custom fit to drop into RASA’s optical window, so you get optimum optical performance even with the addition of the filter.Take beautiful images of deep-sky objects from light-polluted suburban locations with the Rowe-Ackermann Schmidt Astrograph (RASA) using this all-new light pollution suppression filter designed by Celestron and Astrodon, the leading astroimaging filter company.No matter which camera you use, this filter’s generous 72 mm diameter allows it to easily accommodate today’s largest sensors. Get the most out of your Celestron Rowe-Ackermann Schmidt Astrograph, even under light-polluted skies, with this Light Pollution Imaging Filter, custom-designed for RASA by Celestron and Astrodon.
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