Klantbeoordelingen
Fantastic upgrade for old C14 SCT
Beoordeling van Talder aan 28.05.2026 23:39:08( 5 / 5 )
Since Optec times with old small sensor camera's I couldn't find a good large focal reducer for my C14 with full-frame capable illumination circle.
The relatively recent Starizona 3.3" 0.7x reducer suddenly allows true full frame camera view with my C14 with limited distortion in the corners.
There is some vignetting (light dropoff) and OAG views off-axis not too good, but compensated by doubled light gathering power per pixel.
It's perfectly possible to flatfield dark background images, with some slight dropoff in the corners, but overall : FANTASTIC UPGRADE for old C14.
When comparing images at f/11 and now f/7.5 with the Starizona I can effectively detect a gain by a factor 2. The limiting magnitude of same exposure time is clearly better.
Finally possible to image with full frame camera and no worries.
One caveat, you need a 3.3" SCT to M68 or smaller thread adapter because the Starizona keeps 3.3" backend SCT thread.
Overall matching of the recommended backfocus distance of 146 mm for my camera with M68 extension rings was spot on, no tilt,
Image measured FWHM was better than 0.7x improvement, so really corrects SCT, really amazing product.
Happy Customer!
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