LPI FOCAL REDUCER Last updated: 31 December 2004

Subject:	tips for a Home Made LPI Focal Reducer
Sent:	Wednesday, December 29, 2004 00:39:56
From:	Dimitri zilber (zilberd@yahoo.fr)
I'm the happy owner of an ETX 90EC, a skywatcher 80/400 and a skywatcher
newton 130/900.

Last month I bought an LPI imager in order du complete my EOS D30 whitch
is a little heavy for my telescopes.

I am really pleased whith the camera but found that a wider FOV should
have been better.

Because of christmas I really can't spend much much money on a real
focal reducer so I've made one with the front lens of my old 8*21
viewfinder.

English is not my language so I put some photos in the mail for
explanations.










There are some samples of the moon (between two snow showers) and of a
street light about 50meters away. The acquisition has been made with
K3CCDTools in AVI mode.









No post traitment, bmp to jpeg with XnView, and BMP extraction with
AVItoBMP

Clear Skies,
Dimitri

thank you for posting my idea

here's a new pic of the moon that I did yesterday with the focal reducer
attach to the LPI





It is much better than my first try...

Capture in AVI with K3CCD 474 frames
Processing with registax 75 frames selected
and a little wavelet applied

regards

Dimitri Zilber

I take another pic witch was in CIF mode and also with the focal
recucer.
This time the frame rate was 15fps witch is not bad at all (almost like
a TuCam)
and the FOV is almost the same as the LPI without the focal reducer.





I think that I have found my new configuration for imaging saturn
tonight :
CIF mode (352*288) with the focal reducer
at 15fps the atmospheric disturbance was much lighter
than at 2fps

Dimitri

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