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Firstly Bob, were you talking about an EQ5 or an HEQ5? The HEQ5 has
a max payload about 40% more than the EQ5.
I bought the 8" OTA used, so have no idea whether it has an oversized
secondary. I may be wrong, but I think the f/5 was made with either vis or imaging in mind, but the f/4 was made primarily for imaging. Someone
else can probably answer your question better than me.
My f/5 is fine for vis, as good optically as my 10" f4.7 Dob.
Sorry for the slight diversion Stefan.
raymo
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