Quote:
Originally Posted by PRejto
Here is at least one example of EP projection:
https://www.cloudynights.com/topic/7...io-2021-09-10/
I'm no expert in planetary imaging but I suspect that using a 4x barlow may prove very difficult! I noticed for example that a user of a C14 Edge uses a 2.5 barlow and achieved terrific results. The larger aperture would support this resolution and short exposures due to the greater light gathering ability. At 5,000mm FL on your scope I suspect you would need longer exposures (less lucky seeing!) and rather perfect seeing. I was able to take some satisfactory images with my TEC140 and 2-3X barlows but these couldn't compete with large aperture mirrored OTAs.
Peter |
Thanks Peter. Yes I reckoned using prime focus would need a significant Barlow and shutter speeds would be very slow. That’s what made me think of EP projection instead. The image always seems so bright with an eyepiece that sometimes you even need a filter so I thought magnification plus brightness was the winnimg combination.