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Peter,
I had a HEQ5 for 3 years and 2 off EQ6-R mounts for the past 2 years
From experience you will want to eventually take longer exposures rather than be limited to 45 to 60 sec unguided
Remember the HEQ5 is a low end mount and no matter how well you polar align you will be limited to around 60 sec unless you guide
This mount when polar aligned and guiding can easily push 5 min exposures
The HEQ5 is Astrophotography rated to about 9kg max ( you de rate them for long exposure AP outdoors on a tripod )
Estimated payload with guiding
ED100 3kg
Camera 0.70kg
Adapters 0.10kg
Guide scope and camera 1.5kg
Mounting bar 1 kg
Cables 0.20kg drag
Dew straps 0.10kg
Total 6.6kg
So the above set up “including guiding equipment “ is within the maximum recommended AP payload of the HEQ5 mount
Hope the above is useful
Martin
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