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Internal reflection with barlow projection

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#1 Jason_L

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Posted 27 September 2020 - 09:43 PM

I started out with eyepiece projection many years ago with film. I took break for about 15 years, and I'm been reading that barlows are now popular for projection instead of eyepieces. I recently got some pretty good images using my Meade 2x barlow, but I later noticed significant internal reflections when I took some images of the moon last night. Attached is an example. I then tried my trusty SMC Pentax XP-14 eyepiece (from my film years) and I have no internal reflections. I'm shooting with a Meade 12" SCT LX200 classic and a Canon 5DIV (full frame).

 

Is the Meade 2x barlow just a bad item for projection imaging? Why do so many people use barlows instead of eyepieces?

 

Jason



#2 Avgvstvs

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Posted 27 September 2020 - 10:00 PM

I think the Meade barlow is pretty ordinary

I use a TV powermate and Celestron Luminos 2" barlow

They give me good results



#3 wrnchhead

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Posted 27 September 2020 - 11:15 PM

"It's only taken 138,000 Centuries to produce you, don't think you are not special"

Wouldn't that be 138,000,000 centuries?



#4 Jason_L

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Posted 30 September 2020 - 04:21 PM

I use a TV powermate and Celestron Luminos 2" barlow

Thanks. Sounds like most people don't have the internal reflection problem.




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