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Eyepiece projection adaptor

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#1 bouffetout

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Posted 29 November 2012 - 10:49 AM

Hi there all ! I have a Canon T3 hooked on my 8SE with "T-ring" and a "T-adaptor. I would like to be able to Photograph the planets and close-ups of the moon. I think there is an adaptor that fits to the T-ring in wich I could place different 1.25" eyepieces so I could magnify to my likings...Is that thing any good ,does it loose quality because light is going through an eyepiece before hiting the T3 captor ??? Or does it cause vignetting ??
Thank you !
Maxx

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#2 NeilMac

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Posted 29 November 2012 - 12:03 PM

Yes it can, probably depending on the setup as to how bad it can be.
This is from using a 25mm inserted into the adapter.

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#3 Greg K.

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Posted 29 November 2012 - 01:41 PM

A barlow might be a better option.

#4 mmalik

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Posted 29 November 2012 - 02:19 PM

does it loose quality because light is going through an eyepiece before hitting the T3 captor?


Yes; prime is much better than projection. As suggested above, Barlow type magnification will be better.

Some planetary/lunar imaging info in this... doc.

This... will be even better for magnification; well-tested and widely used. This one is 2"; there might be a 1.25" version as well.

Assembled...

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#5 bouffetout

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Posted 29 November 2012 - 02:48 PM

Thank you sir ! I think with my 9mm it would'nt be good enough !

#6 bouffetout

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Posted 29 November 2012 - 02:58 PM

I get it now! Since I have already a televue 2x barlow lens,
all I need is a 2" adaptor to fit my T-ring...but 2x is surely
not enough for planetary,a 5x barlow would be a lot better !!!
Did I understand O.K.
Thank you !
Maxx

#7 mike3362

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Posted 29 November 2012 - 03:53 PM

I have not been able to get a picture of a planet with my 10mm eyepiece. I keep trying, but end up using a 2x Barlow.
The moon was easy with my 10mm.

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#8 mike3362

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Posted 29 November 2012 - 03:55 PM

The picture of Jupiter is with a 2x Barlow.

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#9 mmalik

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Posted 29 November 2012 - 05:06 PM

2x is surely not enough for planetary 5x Barlow would be a lot better !!! Did I understand O.K.


Not exactly; if you are able to get movie crop 640 mode on a DSLR, 2x is plenty. Read the doc link I sent above (appendix section). See this... example if it helps. Thx

#10 AdirondackAstro

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Posted 29 November 2012 - 05:13 PM

I have the Orion Variable Universal Camera Adapter... it works decently, but the main issues are:
1 - It adds quite a bit of weight to the telescope.
2 - I used it for moon and sunspots, but the images after stacking were very grainy and hard to pull out any detail without the grain being unbearable.

My 12.5mm eyepiece seemed to be about as much magnification as I could put in it... I would also suggest looking into a barlow instead of projection adapters.

I haven't really used it much since my first few trial runs. May sell it off to try and get some of my $50 back.

#11 bouffetout

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Posted 29 November 2012 - 05:24 PM

The link you gave me leads me to a PDF file of Image Plus
processing instructions..?? And I have verified and my Canon T3 does not have the crop movie option :nonono: I will go
with a webcam then...

#12 jsc2501

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Posted 29 November 2012 - 05:57 PM

I have had some success with the following combo. I attach the lens from my 2X barlow directly to my T adapter, it screws in just like a filter. I then use backyard EOS at 5X magnification.

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#13 bouffetout

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Posted 29 November 2012 - 06:23 PM

That's a nice photo man !

#14 bouffetout

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Posted 29 November 2012 - 06:24 PM

Thanks for the info my friend !

#15 bouffetout

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Posted 29 November 2012 - 06:27 PM

Thanks for the info my friend !
pretty pic of Jupiter ,I like it !

#16 mmalik

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Posted 30 November 2012 - 01:59 AM

The link you gave me leads me to a PDF file of Image Plus processing instructions..?? And I have verified and my Canon T3 does not have the crop movie option :nonono: I will go with a webcam then...


Yes, 'Appendix I' of the PDF talks about some DSLR settings for planetary imaging; 'Appendix F' talks about lunar/planetary image processing.

Here... is another of moon pics of the given x2/640 movie crop setup.

#17 bouffetout

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Posted 30 November 2012 - 02:34 AM

I tried but my kit doesn'fit together :(
Thank for helping !
Maxx






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