Quote:
Originally Posted by raymo
The f/5 statement could be misleading to newbies Doug. The f number is irrelevant; it's just the construction. My f/5 has enough back focus.
I understand your frustration from earlier posts in other threads, and sympathise with you. I don't recall how much more back focus you need,
would a low profile focuser not be enough? Whoops, sorry, gone off subject.
raymo
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Good point, I'm guesstimating 25-35mm so. Just for interest, can you measure how long your F5's tube length is.