Takahashi FC100 f7.4 vs f9
Last year takahashi released a limited edition new version of the fc100, the fc100dl which was f9 rather than f7.4 for the existing fc100df.
On the face of it these two scopes are very similar but I've been mulling over whether there would be any noticeable difference for planetary observing. I know the f9 will be better but would I be able to tell the difference?
Any thoughts?
Last night, during 3h, I compared my TSA 102 to the brand new FC100-DF of a friend of mine. On Jupiter quickly (with GRS transit !) before it was too low, Mars, Saturn and some close doubles, plus after that some deep sky... We both do only visual... couldn't tell any difference at all when magnification was the same, BUT when we arrived on site, his refractor was on temperature 15 minutes before mine, and is 1.5 kg or so... a real traveler solution. But visually only, really, impossible to see