Tele Vue TRF-2008 Field flattener

Sky Watcher Equinox Pro 80mm OTA + Tele Vue TRF-2008 field flattener + QHY10 camera & William Optics 66mm OTQ with T7C guide camera + TS OAG/flip mirror on HEQ5 Pro & focus points on both scopes with these cameras 20/9/2019

Sky Watcher Equinox Pro 80mm OTA + Tele Vue TRF-2008 field flattener + QHY10 camera & William Optics 66mm OTQ with T7C guide camera + TS OAG/flip mirror on HEQ5 Pro & focus points on both scopes with these cameras 20/9/2019:

     

Focusing QHY10 with Tele Vue TRF-2008 Reducer-flattener in situ for first time during day on Sky Watcher Equinox Pro 80mm OTA

I added my Tele Vue TRF-2008 Reducer-flattener into the imaging train for my QHY10 camera on my Sky Watcher Equinox Pro 80mm telescope today. As first step, I decided to try focusing it during the day. This needed me to reduce the aperture by 70% with aperture mask as well using minimum 1/10000 second exposure setting in Nebulosity 4 for the camera and also aim as the darkest part of the daytime garden.

Following image shows bottom garden in focus with QHY10 only attached to telescope:

In the following image, I added in my Tele Vue TRF-2008 Reducer-flattener and TS Optics off axis guider/flip mirror together into the imaging train – as you can see I could not obtain focus even when the focuser was fully racked in as far as it would go (needed to go in not out – could see focus improve as I did so):

Finally, in this image, you can see that I obtained focus with the Tele Vue TRF-2008 Reducer-flattener and QHY10 but without the TS Optics off axis guider/flip mirror, so sadly I won’t be able to use the TS OAG/FM with the TRF-2008 and my QHY10:

Focus was achieved at the end of the garden with QHY10 and Tele Vue TRF-2008 Reducer-flattener with a setting of 17mm on the focus tube of the Equinox 80mm OTA. Note 35mm of T2-adapters were used as spacer between the TRF-2008 and QHY10 as advised in the TRF-2008 manual.

Next step is to try focusing at night and find alternative way of finding my objects than the TS OAG/FM as I am keen to use the TRF-2008.

Andy