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Primer - Eyepiece projection with a webcam

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14 replies to this topic

#1
legion48

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I've been asked quite a lot recently about how to do EP projection. Well, here's how I do it.:icon_eek:


PRIMER - EYEPIECE PROJECTION WITH A WEBCAM


1. Prepare the webcam. The webcam is setup in exactly the same way as for prime focus photography – lens removed and nose piece and any filters attached.


2. Place the eyepiece of choice into the focuser. I usually use a 10mm EP.


3. Attach the eyepiece projection adaptor to the eyepiece and tighten the grub screws.


4. Turn on your scopes drives/tracking and start capture software. If you don't have drives/tracking then EP projection is going to be very difficult, if not impossible.


5. Now to find and center the target. Remove the eyepiece and eyepiece adaptor and replace with an eyepiece of choice for acquiring the target. I usually start with a 25m EP. Center the target and replace the eyepiece with a higher power eyepiece. I use a 6mm EP. Center again. Remove the eyepiece.


6. Insert the webcam into the other end of the eyepiece projection adaptor. Very carefully, you don't want to knock your target off center, insert the eyepiece end of the EP adaptor/webcam into the focuser.


7. You should see your target on screen. If not then make sure you have the gain way up on your capture software as the target is likely to be way out of focus and therefore very dim. If you still can't see anything on screen, then repeat from step 5.


The EP adapter I use:


Posted Image
Tony

* OMC-140
* Skywatcher 8 inch Newt
* Celestron C6 Newt
* 8 X 60 Bino's
* EQ5 - dual axis drives
* DFK21 Colour
* Astro Web Site: http://www.astro-images.com/
* Android apps Site: http://astro-images.com/apps.html

#2
rawhead

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Thanks for that Tony. :icon_eek:
Where did you get your EP adapter?

Cheers

Jon
Jon Posted Image
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#3
legion48

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I can't remember Jon. I've been searching the web but I can't find one like mine.:rolleyes:
Tony

* OMC-140
* Skywatcher 8 inch Newt
* Celestron C6 Newt
* 8 X 60 Bino's
* EQ5 - dual axis drives
* DFK21 Colour
* Astro Web Site: http://www.astro-images.com/
* Android apps Site: http://astro-images.com/apps.html

#4
Macavity

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Good stuff. :)

For Baader Hyperion users:
Adapter: T2 innen / 1,25" Steck innen - 1,25" Zubehör an T2 - Teleskop-Express: DER Astroshop + Fotografie + Naturbeobachtung :rolleyes:
But all they need for a first go...
Chris / Macavity

Skywatchers: ST102, MAK150. TS 8" / F4 Photo-Newt for Video Astronomy
Alexanders Obsy, HEQ5, Watec 120N+, Baader Hypes, TS HR Planetaries...

#5
Brinders

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Good stuff. :eek:

For Baader Hyperion users:
Adapter: T2 innen / 1,25" Steck innen - 1,25" Zubehör an T2 - Teleskop-Express: DER Astroshop + Fotografie + Naturbeobachtung :)
But all they need for a first go...



Doesn't look like the same thing to me.:rolleyes:
Someone put that damned light out!

Scopes: Celestron CPC 925 GPS, Celestron Nexstar SLT GOTO Alt Az mount, WO Megrez 72 APO & TAL 150P

Cameras: Neximage CCD, 1/3" Sony chip CCD security cam and Pentax K20D DSLR

Samsung NC10 Netbook to image and control both the SLT and CPC mounts

Location: Blackpool UK (53 degrees North)

#6
themos

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How does focusing work? With the focuser or by adjusting e/p-to-webcam distance or both?

12" f/5  Dobsonian · 80mm f/6 triplet · 114mm f/8 Newtonian · 10x50 Bresser · 15x70 Revelation

PCVC740K · SPC900NC diy LX · modded 450D · Atik 16ic
300mm f/4.5 · 200mm f/2.8L · 135 mm f/3.5 · 55mm f/1.8 · 18-55mm f/3.5-5.6
TV 2.5x Barlow · Nagler 12mm · TMB 3.2mm · Ortho 9/7/5mm · Lumicon OIII · Baader UHC-S · Astronomik CLS EOS-clip
EQ6 Syntrek/EQMOD · diy Autoguided EQ1 · diy ASCOM focuser · Binoflex ST50


#7
beamish

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Thanks for that Tony. :rolleyes:
Where did you get your EP adapter?

Cheers

Jon


Super-lite eyepiece projection coupler for webcams here

CCD and Webcam Accessories

thats where I got mine ( about time I gave it a go ! )

Hope that helps

Karlo

Karlo



a scope or two , a mount, a camera some bits and apparently no time :(


#8
Brinders

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Super-lite eyepiece projection coupler for webcams here

CCD and Webcam Accessories

thats where I got mine ( about time I gave it a go ! )

Hope that helps

Karlo


Ah, that looks like the one! :rolleyes:
Someone put that damned light out!

Scopes: Celestron CPC 925 GPS, Celestron Nexstar SLT GOTO Alt Az mount, WO Megrez 72 APO & TAL 150P

Cameras: Neximage CCD, 1/3" Sony chip CCD security cam and Pentax K20D DSLR

Samsung NC10 Netbook to image and control both the SLT and CPC mounts

Location: Blackpool UK (53 degrees North)

#9
Macavity

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Doesn't look like the same thing to me.:rolleyes:

Oh, it is definitely for Hyperion eyepieces only (Sorry for any confusion) but adapts the rear e.p. thread to a Webcam. May highlight the ease with which Hyp users might use these (useful thread) ideas. :)
Chris / Macavity

Skywatchers: ST102, MAK150. TS 8" / F4 Photo-Newt for Video Astronomy
Alexanders Obsy, HEQ5, Watec 120N+, Baader Hypes, TS HR Planetaries...

#10
legion48

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How does focusing work? With the focuser or by adjusting e/p-to-webcam distance or both?


Both but I've felt no need to use anything but the focuser.
Tony

* OMC-140
* Skywatcher 8 inch Newt
* Celestron C6 Newt
* 8 X 60 Bino's
* EQ5 - dual axis drives
* DFK21 Colour
* Astro Web Site: http://www.astro-images.com/
* Android apps Site: http://astro-images.com/apps.html

#11
beamish

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Tony, might seem like a daft question but does the webcam have it's original lens in or not ?


Karlo

Karlo



a scope or two , a mount, a camera some bits and apparently no time :(


#12
legion48

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PRIMER - EYEPIECE PROJECTION WITH A WEBCAM


1. Prepare the webcam. The webcam is setup in exactly the same way as for prime focus photography – lens removed and nose piece and any filters attached.

:rolleyes:
Tony

* OMC-140
* Skywatcher 8 inch Newt
* Celestron C6 Newt
* 8 X 60 Bino's
* EQ5 - dual axis drives
* DFK21 Colour
* Astro Web Site: http://www.astro-images.com/
* Android apps Site: http://astro-images.com/apps.html

#13
beamish

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:rolleyes:

Karlo



a scope or two , a mount, a camera some bits and apparently no time :(


#14
legion48

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I can't remember Jon. I've been searching the web but I can't find one like mine.:rolleyes:


Found it.:) Here's the adaptor I use:
Astro Engineering AC412 Super-lite eyepiece projection coupler for webcams
Tony

* OMC-140
* Skywatcher 8 inch Newt
* Celestron C6 Newt
* 8 X 60 Bino's
* EQ5 - dual axis drives
* DFK21 Colour
* Astro Web Site: http://www.astro-images.com/
* Android apps Site: http://astro-images.com/apps.html

#15
todd8137

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Any chance you could post a pic with ep,dmk and adapter attached to ep ?
Pat
16" Reflector Oldham Optics Mirror set 1/4 waveC 9.25' SCT C GEM Pier Mounted in obsycables,[color=#00ff00]Filters, yes to many to list all baader some astronomics<p>




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