Astromelb
06-11-2018, 04:49 PM
FOR SALE - MEADE FIELD DE-ROTATOR MODEL 1220
Suits all LX200 and RCX400/ LX400 models (including the 16").
Clearing stuff from my astronomy collection that I will never use.
If you want to do long exposure photo or CCD imaging (over 5 minutes) in altazimuth mode without a wedge, you can correct for field rotation (which results from the scope not rotating on the same axis that the earth does) with the #1220 Field De-Rotator. Attaches to the rear cell of your telescope to precisely counter the effects of altazimuth-induced field rotation. For 7", 8", 10", 12" and 14" LX200 and RCX400/LX400 models including 16".
The #1220 Field De-Rotator attaches to the rear cell of your telescope and plugs into an RS232 port. Digital data fed from the telescope's microporcessor to the #1220 Field De-Rotator permit precise and continuous update of the de-rotation required to maintain pinpoint star images throughout the field. The effect is that even during the longest CCD or photographic exposures, the telescope acts as if it were precisely equatorially mounted.
Price $ 100
Pickup from Bentleigh, Melbourne - or shipment $ 20 nationally via Australia Post.
Thanks for looking.
Suits all LX200 and RCX400/ LX400 models (including the 16").
Clearing stuff from my astronomy collection that I will never use.
If you want to do long exposure photo or CCD imaging (over 5 minutes) in altazimuth mode without a wedge, you can correct for field rotation (which results from the scope not rotating on the same axis that the earth does) with the #1220 Field De-Rotator. Attaches to the rear cell of your telescope to precisely counter the effects of altazimuth-induced field rotation. For 7", 8", 10", 12" and 14" LX200 and RCX400/LX400 models including 16".
The #1220 Field De-Rotator attaches to the rear cell of your telescope and plugs into an RS232 port. Digital data fed from the telescope's microporcessor to the #1220 Field De-Rotator permit precise and continuous update of the de-rotation required to maintain pinpoint star images throughout the field. The effect is that even during the longest CCD or photographic exposures, the telescope acts as if it were precisely equatorially mounted.
Price $ 100
Pickup from Bentleigh, Melbourne - or shipment $ 20 nationally via Australia Post.
Thanks for looking.