Has anyone tried the Optec F3.3 maxfield telecompressor on their LX200R scope? I want to get my F10 down to about F3.3 to use with my video camera. Optec states it should not be used with chip sizes larger than 11mm but my camera has a chip size of 8mm. Any one tried this reducer and thier LX200 R scope?
Sounds to me that it will work OK. Your chip is 8mm, so there should be no vignetting.
One thing to consider is mounting a small refractor scope with an illuminated reticle eyepiece in it, piggybacked on the top of your SCT OTA. With the refractor as a "super finder", collimated with the SCT OTA, you will find it much easier to keep the object centered on the chip.
Hope it works out for you.
-------------------- Matthew Ota
10 inch Meade LX250GPS SCT (LX50/LX200GPS clone) f6.3-Orion 80ED, ETX-90 OTA, Coronado Helios 1 H-alpha Solar Telescope
Cassini Huygens Saturn Observation Campaign
New Hampshire Astronomical Society
Quote: Sounds to me that it will work OK. Your chip is 8mm, so there should be no vignetting.
I use a Meade f/3.3 on my 12" LX200 Classic and vignetting is evident but resolved with good 'flats'. I've even pushed the 'speed' to f/2.6 with extension tubes [I'm using a tiny Starlight Xpress Lodestar CCD] where vignetting obviously becomes more of a problem but again sorted with good flats. In this mode the native 3000mm fl is reduced to ~800mm and the fov increased dramatically with some slight loss of image quality
Be advise the actual f/ratio is much effected by the precise separation of focal reducer from sensor - a few millimeters makes a great difference - don't assume you can just screw it in and get f/3.3.
I check the actual fov [various ways to do this] to determine the new reduced focal length then calc the new F/ratio by dividing the scope aperture into the new focal length
Previous
Index
Next
Threaded
Edit
Reply
Quote
[Re: 
