Secondary and spider vein reflections appearing in my telescope images

Ritchey-Chrétien Calibration Optics Help Needed Vignetting
3 replies•101 views
Christopher Gomez avatar
Christopher Gomez avatar

Hi all

Seeing if anyone has run into the issue if having flat frames that show the shadowing and spider veins of the secondary on the RC telescopes. Mine is the IOptron version but other brands may be the same. I know with the newer models, the baffling extension was not an issue and not needed but this has me scratching my head! Is this due to the baffling issues? Light leaks? Reflections?

Any help is appreciated

Thanks,

Chris Gomez

📷 L Flat Frame defects.jpgL Flat Frame defects.jpg

L Flat Frame defects.jpg

📷 L Flat Frame.jpgL Flat Frame.jpg

L Flat Frame.jpg

Engaging
andrea tasselli avatar
andrea tasselli avatar
Reflection. Are you using a flattener/reducer by any chance?
Christopher Gomez avatar
Christopher Gomez avatar

Yes, this is the Flattener im using, which is suposed to be designed to work with RCs. I used it with my RC10 in the past and didn’t have that issue.

https://www.firstlightoptics.com/reducersflatteners/ts-3-m68-flattener-for-f8-rc-telescopes.html

andrea tasselli avatar
andrea tasselli avatar
Remove and check with a flat. The reflection should disappear.
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